Merge v7.1.5linux-rolling-stable

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

52 files changed, 918 insertions, 284 deletions

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 6e59b8f63e41..641a180fb35f 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -37,6 +37,7 @@ TARGETS += filesystems/fat
 TARGETS += filesystems/overlayfs
 TARGETS += filesystems/statmount
 TARGETS += filesystems/mount-notify
+TARGETS += filesystems/nsfs
 TARGETS += filesystems/fuse
 TARGETS += filesystems/move_mount
 TARGETS += filesystems/empty_mntns
@@ -85,7 +86,6 @@ TARGETS += net/ppp
 TARGETS += net/rds
 TARGETS += net/tcp_ao
 TARGETS += nolibc
-TARGETS += nsfs
 TARGETS += pci_endpoint
 TARGETS += pcie_bwctrl
 TARGETS += perf_events
diff --git a/tools/testing/selftests/bpf/README.rst b/tools/testing/selftests/bpf/README.rst
index 776fbe3cb8f9..37164322a102 100644
--- a/tools/testing/selftests/bpf/README.rst
+++ b/tools/testing/selftests/bpf/README.rst
@@ -77,7 +77,7 @@ In case of linker errors when running selftests, try using static linking:
 
 .. code-block:: console
 
-  $ LDLIBS=-static PKG_CONFIG='pkg-config --static' vmtest.sh
+  $ LDLIBS=-static EXTRA_LDFLAGS=-static PKG_CONFIG='pkg-config --static' vmtest.sh
 
 .. note:: Some distros may not support static linking.
 
diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_attr_size.c b/tools/testing/selftests/bpf/prog_tests/bpf_attr_size.c
new file mode 100644
index 000000000000..32159dc64da8
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_attr_size.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2026 Google LLC */
+#include <linux/bpf.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <test_progs.h>
+#include <cgroup_helpers.h>
+#include "cgroup_skb_direct_packet_access.skel.h"
+
+#define OLD_QUERY_SIZE		offsetofend(union bpf_attr, query.prog_cnt)
+#define FULL_QUERY_SIZE		offsetofend(union bpf_attr, query.revision)
+
+static void test_query_size_boundaries(void)
+{
+	struct cgroup_skb_direct_packet_access *skel;
+	struct bpf_link *link = NULL;
+	union bpf_attr attr;
+	int cg_fd = -1;
+	int err;
+
+	skel = cgroup_skb_direct_packet_access__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_load"))
+		return;
+
+	cg_fd = test__join_cgroup("/attr_size_cg");
+	if (!ASSERT_GE(cg_fd, 0, "join_cgroup"))
+		goto cleanup;
+
+	link = bpf_program__attach_cgroup(skel->progs.direct_packet_access,
+					  cg_fd);
+	if (!ASSERT_OK_PTR(link, "cg_attach"))
+		goto cleanup;
+
+	memset(&attr, 0, sizeof(attr));
+	attr.query.target_fd = cg_fd;
+	attr.query.attach_type = BPF_CGROUP_INET_INGRESS;
+	attr.query.revision = 0xdeadbeefdeadbeefULL;
+
+	err = syscall(__NR_bpf, BPF_PROG_QUERY, &attr, OLD_QUERY_SIZE);
+	if (ASSERT_OK(err, "query_old_size")) {
+		ASSERT_EQ(attr.query.prog_cnt, 1, "prog_cnt_written_old");
+		ASSERT_EQ(attr.query.revision, 0xdeadbeefdeadbeefULL,
+			  "revision_not_written_old");
+	}
+
+	memset(&attr, 0, sizeof(attr));
+	attr.query.target_fd = cg_fd;
+	attr.query.attach_type = BPF_CGROUP_INET_INGRESS;
+
+	err = syscall(__NR_bpf, BPF_PROG_QUERY, &attr, FULL_QUERY_SIZE);
+	if (!ASSERT_OK(err, "query_full_size"))
+		goto cleanup;
+
+	ASSERT_EQ(attr.query.prog_cnt, 1, "prog_cnt_written");
+	ASSERT_GT(attr.query.revision, 0, "revision_written");
+
+cleanup:
+	if (link)
+		bpf_link__destroy(link);
+	if (cg_fd >= 0)
+		close(cg_fd);
+	cgroup_skb_direct_packet_access__destroy(skel);
+}
+
+void test_bpf_attr_size(void)
+{
+	if (test__start_subtest("query_size_boundaries"))
+		test_query_size_boundaries();
+}
diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_nf.c b/tools/testing/selftests/bpf/prog_tests/bpf_nf.c
index 215878ea04de..4b06a5490714 100644
--- a/tools/testing/selftests/bpf/prog_tests/bpf_nf.c
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_nf.c
@@ -5,6 +5,8 @@
 #include "test_bpf_nf.skel.h"
 #include "test_bpf_nf_fail.skel.h"
 
+#define CT_OPTS_ERROR_GUARD 0x12345678
+
 static char log_buf[1024 * 1024];
 
 struct {
@@ -119,6 +121,10 @@ static void test_bpf_nf_ct(int mode)
 	ASSERT_EQ(skel->bss->test_einval_reserved_new, -EINVAL, "Test EINVAL for reserved in new struct not set to 0");
 	ASSERT_EQ(skel->bss->test_einval_netns_id, -EINVAL, "Test EINVAL for netns_id < -1");
 	ASSERT_EQ(skel->bss->test_einval_len_opts, -EINVAL, "Test EINVAL for len__opts != NF_BPF_CT_OPTS_SZ");
+	ASSERT_EQ(skel->bss->test_einval_len_opts_small_lookup, CT_OPTS_ERROR_GUARD,
+		  "Test no error write for lookup opts__sz before error field");
+	ASSERT_EQ(skel->bss->test_einval_len_opts_small_alloc, CT_OPTS_ERROR_GUARD,
+		  "Test no error write for alloc opts__sz before error field");
 	ASSERT_EQ(skel->bss->test_eproto_l4proto, -EPROTO, "Test EPROTO for l4proto != TCP or UDP");
 	ASSERT_EQ(skel->bss->test_enonet_netns_id, -ENONET, "Test ENONET for bad but valid netns_id");
 	ASSERT_EQ(skel->bss->test_enoent_lookup, -ENOENT, "Test ENOENT for failed lookup");
diff --git a/tools/testing/selftests/bpf/prog_tests/fill_link_info.c b/tools/testing/selftests/bpf/prog_tests/fill_link_info.c
index e40114620751..f589eefbf9fb 100644
--- a/tools/testing/selftests/bpf/prog_tests/fill_link_info.c
+++ b/tools/testing/selftests/bpf/prog_tests/fill_link_info.c
@@ -469,7 +469,7 @@ verify_umulti_link_info(int fd, bool retprobe, __u64 *offsets,
 
 		ASSERT_EQ(info.uprobe_multi.pid, getpid(), "info.uprobe_multi.pid");
 		ASSERT_EQ(info.uprobe_multi.count, 3, "info.uprobe_multi.count");
-		ASSERT_EQ(info.uprobe_multi.flags & BPF_F_KPROBE_MULTI_RETURN,
+		ASSERT_EQ(info.uprobe_multi.flags & BPF_F_UPROBE_MULTI_RETURN,
 			  retprobe, "info.uprobe_multi.flags.retprobe");
 		ASSERT_EQ(info.uprobe_multi.path_size, strlen(path) + 1, "info.uprobe_multi.path_size");
 		ASSERT_STREQ(path_buf, path, "info.uprobe_multi.path");
diff --git a/tools/testing/selftests/bpf/prog_tests/htab_update.c b/tools/testing/selftests/bpf/prog_tests/htab_update.c
index ea1a6766fbe9..0a28d4346924 100644
--- a/tools/testing/selftests/bpf/prog_tests/htab_update.c
+++ b/tools/testing/selftests/bpf/prog_tests/htab_update.c
@@ -23,7 +23,7 @@ static void test_reenter_update(void)
 	if (!ASSERT_OK_PTR(skel, "htab_update__open"))
 		return;
 
-	bpf_program__set_autoload(skel->progs.bpf_obj_free_fields, true);
+	bpf_program__set_autoload(skel->progs.bpf_obj_cancel_fields, true);
 	err = htab_update__load(skel);
 	if (!ASSERT_TRUE(!err, "htab_update__load") || err)
 		goto out;
@@ -50,7 +50,7 @@ static void test_reenter_update(void)
 	/*
 	 * Second update: replace existing element with same key and trigger
 	 * the reentrancy of bpf_map_update_elem().
-	 * check_and_free_fields() calls bpf_obj_free_fields() on the old
+	 * check_and_cancel_fields() calls bpf_obj_cancel_fields() on the old
 	 * value, which is where fentry program runs and performs a nested
 	 * bpf_map_update_elem(), triggering -EDEADLK.
 	 */
diff --git a/tools/testing/selftests/bpf/prog_tests/linked_list.c b/tools/testing/selftests/bpf/prog_tests/linked_list.c
index 6f25b5f39a79..62d974a1987f 100644
--- a/tools/testing/selftests/bpf/prog_tests/linked_list.c
+++ b/tools/testing/selftests/bpf/prog_tests/linked_list.c
@@ -131,13 +131,14 @@ end:
 	linked_list_fail__destroy(skel);
 }
 
-static void clear_fields(struct bpf_map *map)
+static void clear_fields(struct bpf_program *prog)
 {
-	char buf[24];
-	int key = 0;
+	LIBBPF_OPTS(bpf_test_run_opts, opts);
+	int ret;
 
-	memset(buf, 0xff, sizeof(buf));
-	ASSERT_OK(bpf_map__update_elem(map, &key, sizeof(key), buf, sizeof(buf), 0), "check_and_free_fields");
+	ret = bpf_prog_test_run_opts(bpf_program__fd(prog), &opts);
+	ASSERT_OK(ret, "clear_fields");
+	ASSERT_OK(opts.retval, "clear_fields retval");
 }
 
 enum {
@@ -170,31 +171,31 @@ static void test_linked_list_success(int mode, bool leave_in_map)
 	ASSERT_OK(ret, "map_list_push_pop");
 	ASSERT_OK(opts.retval, "map_list_push_pop retval");
 	if (!leave_in_map)
-		clear_fields(skel->maps.array_map);
+		clear_fields(skel->progs.clear_map_list);
 
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.inner_map_list_push_pop), &opts);
 	ASSERT_OK(ret, "inner_map_list_push_pop");
 	ASSERT_OK(opts.retval, "inner_map_list_push_pop retval");
 	if (!leave_in_map)
-		clear_fields(skel->maps.inner_map);
+		clear_fields(skel->progs.clear_inner_map_list);
 
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.global_list_push_pop), &opts);
 	ASSERT_OK(ret, "global_list_push_pop");
 	ASSERT_OK(opts.retval, "global_list_push_pop retval");
 	if (!leave_in_map)
-		clear_fields(skel->maps.bss_A);
+		clear_fields(skel->progs.clear_global_list);
 
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.global_list_push_pop_nested), &opts);
 	ASSERT_OK(ret, "global_list_push_pop_nested");
 	ASSERT_OK(opts.retval, "global_list_push_pop_nested retval");
 	if (!leave_in_map)
-		clear_fields(skel->maps.bss_A);
+		clear_fields(skel->progs.clear_global_nested_list);
 
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.global_list_array_push_pop), &opts);
 	ASSERT_OK(ret, "global_list_array_push_pop");
 	ASSERT_OK(opts.retval, "global_list_array_push_pop retval");
 	if (!leave_in_map)
-		clear_fields(skel->maps.bss_A);
+		clear_fields(skel->progs.clear_global_array_list);
 
 	if (mode == PUSH_POP)
 		goto end;
@@ -204,19 +205,19 @@ ppm:
 	ASSERT_OK(ret, "map_list_push_pop_multiple");
 	ASSERT_OK(opts.retval, "map_list_push_pop_multiple retval");
 	if (!leave_in_map)
-		clear_fields(skel->maps.array_map);
+		clear_fields(skel->progs.clear_map_list);
 
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.inner_map_list_push_pop_multiple), &opts);
 	ASSERT_OK(ret, "inner_map_list_push_pop_multiple");
 	ASSERT_OK(opts.retval, "inner_map_list_push_pop_multiple retval");
 	if (!leave_in_map)
-		clear_fields(skel->maps.inner_map);
+		clear_fields(skel->progs.clear_inner_map_list);
 
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.global_list_push_pop_multiple), &opts);
 	ASSERT_OK(ret, "global_list_push_pop_multiple");
 	ASSERT_OK(opts.retval, "global_list_push_pop_multiple retval");
 	if (!leave_in_map)
-		clear_fields(skel->maps.bss_A);
+		clear_fields(skel->progs.clear_global_list);
 
 	if (mode == PUSH_POP_MULT)
 		goto end;
@@ -226,19 +227,19 @@ lil:
 	ASSERT_OK(ret, "map_list_in_list");
 	ASSERT_OK(opts.retval, "map_list_in_list retval");
 	if (!leave_in_map)
-		clear_fields(skel->maps.array_map);
+		clear_fields(skel->progs.clear_map_list);
 
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.inner_map_list_in_list), &opts);
 	ASSERT_OK(ret, "inner_map_list_in_list");
 	ASSERT_OK(opts.retval, "inner_map_list_in_list retval");
 	if (!leave_in_map)
-		clear_fields(skel->maps.inner_map);
+		clear_fields(skel->progs.clear_inner_map_list);
 
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.global_list_in_list), &opts);
 	ASSERT_OK(ret, "global_list_in_list");
 	ASSERT_OK(opts.retval, "global_list_in_list retval");
 	if (!leave_in_map)
-		clear_fields(skel->maps.bss_A);
+		clear_fields(skel->progs.clear_global_list);
 end:
 	linked_list__destroy(skel);
 }
diff --git a/tools/testing/selftests/bpf/prog_tests/map_kptr.c b/tools/testing/selftests/bpf/prog_tests/map_kptr.c
index 03b46f17cf53..ec6f2f2e8308 100644
--- a/tools/testing/selftests/bpf/prog_tests/map_kptr.c
+++ b/tools/testing/selftests/bpf/prog_tests/map_kptr.c
@@ -51,7 +51,6 @@ static void test_map_kptr_success(bool test_run)
 	ret = bpf_map__update_elem(skel->maps.array_map,
 				   &key, sizeof(key), buf, sizeof(buf), 0);
 	ASSERT_OK(ret, "array_map update");
-	skel->data->ref--;
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.test_map_kptr_ref3), &opts);
 	ASSERT_OK(ret, "test_map_kptr_ref3 refcount");
 	ASSERT_OK(opts.retval, "test_map_kptr_ref3 retval");
@@ -59,49 +58,42 @@ static void test_map_kptr_success(bool test_run)
 	ret = bpf_map__update_elem(skel->maps.pcpu_array_map,
 				   &key, sizeof(key), pbuf, cpu * sizeof(buf), 0);
 	ASSERT_OK(ret, "pcpu_array_map update");
-	skel->data->ref--;
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.test_map_kptr_ref3), &opts);
 	ASSERT_OK(ret, "test_map_kptr_ref3 refcount");
 	ASSERT_OK(opts.retval, "test_map_kptr_ref3 retval");
 
 	ret = bpf_map__delete_elem(skel->maps.hash_map, &key, sizeof(key), 0);
 	ASSERT_OK(ret, "hash_map delete");
-	skel->data->ref--;
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.test_map_kptr_ref3), &opts);
 	ASSERT_OK(ret, "test_map_kptr_ref3 refcount");
 	ASSERT_OK(opts.retval, "test_map_kptr_ref3 retval");
 
 	ret = bpf_map__delete_elem(skel->maps.pcpu_hash_map, &key, sizeof(key), 0);
 	ASSERT_OK(ret, "pcpu_hash_map delete");
-	skel->data->ref--;
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.test_map_kptr_ref3), &opts);
 	ASSERT_OK(ret, "test_map_kptr_ref3 refcount");
 	ASSERT_OK(opts.retval, "test_map_kptr_ref3 retval");
 
 	ret = bpf_map__delete_elem(skel->maps.hash_malloc_map, &key, sizeof(key), 0);
 	ASSERT_OK(ret, "hash_malloc_map delete");
-	skel->data->ref--;
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.test_map_kptr_ref3), &opts);
 	ASSERT_OK(ret, "test_map_kptr_ref3 refcount");
 	ASSERT_OK(opts.retval, "test_map_kptr_ref3 retval");
 
 	ret = bpf_map__delete_elem(skel->maps.pcpu_hash_malloc_map, &key, sizeof(key), 0);
 	ASSERT_OK(ret, "pcpu_hash_malloc_map delete");
-	skel->data->ref--;
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.test_map_kptr_ref3), &opts);
 	ASSERT_OK(ret, "test_map_kptr_ref3 refcount");
 	ASSERT_OK(opts.retval, "test_map_kptr_ref3 retval");
 
 	ret = bpf_map__delete_elem(skel->maps.lru_hash_map, &key, sizeof(key), 0);
 	ASSERT_OK(ret, "lru_hash_map delete");
-	skel->data->ref--;
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.test_map_kptr_ref3), &opts);
 	ASSERT_OK(ret, "test_map_kptr_ref3 refcount");
 	ASSERT_OK(opts.retval, "test_map_kptr_ref3 retval");
 
 	ret = bpf_map__delete_elem(skel->maps.lru_pcpu_hash_map, &key, sizeof(key), 0);
 	ASSERT_OK(ret, "lru_pcpu_hash_map delete");
-	skel->data->ref--;
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.test_map_kptr_ref3), &opts);
 	ASSERT_OK(ret, "test_map_kptr_ref3 refcount");
 	ASSERT_OK(opts.retval, "test_map_kptr_ref3 retval");
@@ -175,7 +167,7 @@ void serial_test_map_kptr(void)
 		ASSERT_OK(kern_sync_rcu(), "sync rcu");
 		wait_for_map_release();
 
-		/* Observe refcount dropping to 1 on synchronous delete elem */
+		/* Observe refcount dropping to 1 on map release. */
 		test_map_kptr_success(true);
 	}
 
diff --git a/tools/testing/selftests/bpf/prog_tests/raw_tp_writable_reject_bad_access.c b/tools/testing/selftests/bpf/prog_tests/raw_tp_writable_reject_bad_access.c
new file mode 100644
index 000000000000..b8538fc4fc3f
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/raw_tp_writable_reject_bad_access.c
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <test_progs.h>
+#include "test_kmods/bpf_testmod.h"
+#include "bpf_util.h"
+
+static void check_attach_reject(const struct bpf_insn *program, size_t prog_len)
+{
+	LIBBPF_OPTS(bpf_prog_load_opts, opts);
+	char error[4096];
+	int bpf_fd, tp_fd;
+
+	opts.log_level = 2;
+	opts.log_buf = error;
+	opts.log_size = sizeof(error);
+
+	bpf_fd = bpf_prog_load(BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE, NULL, "GPL v2",
+			       program, prog_len, &opts);
+	if (!ASSERT_GE(bpf_fd, 0, "prog_load"))
+		return;
+
+	tp_fd = bpf_raw_tracepoint_open("bpf_testmod_test_writable_bare_tp", bpf_fd);
+	ASSERT_EQ(tp_fd, -EINVAL, "bpf_raw_tracepoint_open");
+	if (tp_fd >= 0)
+		close(tp_fd);
+
+	close(bpf_fd);
+}
+
+void test_raw_tp_writable_reject_bad_access(void)
+{
+	const struct bpf_insn program[] = {
+		/* r6 is our tp buffer */
+		BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
+		/* one byte beyond the end of the writable context */
+		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_6,
+			    sizeof(struct bpf_testmod_test_writable_ctx)),
+		BPF_EXIT_INSN(),
+	};
+
+	const struct bpf_insn negative_var_off_program[] = {
+		BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
+		/* make var_off negative, but keep the effective access offset non-negative */
+		BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
+		/* one byte beyond the end of the writable context */
+		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_6,
+			    sizeof(struct bpf_testmod_test_writable_ctx) + 8),
+		BPF_EXIT_INSN(),
+	};
+
+	if (test__start_subtest("past_end"))
+		check_attach_reject(program, ARRAY_SIZE(program));
+
+	if (test__start_subtest("negative_var_off_past_end"))
+		check_attach_reject(negative_var_off_program,
+				    ARRAY_SIZE(negative_var_off_program));
+}
diff --git a/tools/testing/selftests/bpf/prog_tests/raw_tp_writable_reject_nbd_invalid.c b/tools/testing/selftests/bpf/prog_tests/raw_tp_writable_reject_nbd_invalid.c
deleted file mode 100644
index 216b0dfac0fe..000000000000
--- a/tools/testing/selftests/bpf/prog_tests/raw_tp_writable_reject_nbd_invalid.c
+++ /dev/null
@@ -1,43 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include <test_progs.h>
-#include <linux/nbd.h>
-#include "bpf_util.h"
-
-void test_raw_tp_writable_reject_nbd_invalid(void)
-{
-	__u32 duration = 0;
-	char error[4096];
-	int bpf_fd = -1, tp_fd = -1;
-
-	const struct bpf_insn program[] = {
-		/* r6 is our tp buffer */
-		BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
-		/* one byte beyond the end of the nbd_request struct */
-		BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_6,
-			    sizeof(struct nbd_request)),
-		BPF_EXIT_INSN(),
-	};
-
-	LIBBPF_OPTS(bpf_prog_load_opts, opts,
-		.log_level = 2,
-		.log_buf = error,
-		.log_size = sizeof(error),
-	);
-
-	bpf_fd = bpf_prog_load(BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE, NULL, "GPL v2",
-			       program, ARRAY_SIZE(program),
-			       &opts);
-	if (CHECK(bpf_fd < 0, "bpf_raw_tracepoint_writable load",
-		  "failed: %d errno %d\n", bpf_fd, errno))
-		return;
-
-	tp_fd = bpf_raw_tracepoint_open("nbd_send_request", bpf_fd);
-	if (CHECK(tp_fd >= 0, "bpf_raw_tracepoint_writable open",
-		  "erroneously succeeded\n"))
-		goto out_bpffd;
-
-	close(tp_fd);
-out_bpffd:
-	close(bpf_fd);
-}
diff --git a/tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c b/tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c
index d2c0542716a8..1737eba34323 100644
--- a/tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c
+++ b/tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c
@@ -57,6 +57,7 @@ void test_percpu_hash_refcounted_kptr_refcount_leak(void)
 		    .data_size_in = sizeof(pkt_v4),
 		    .repeat = 1,
 	);
+	LIBBPF_OPTS(bpf_test_run_opts, syscall_opts);
 
 	cpu_nr = libbpf_num_possible_cpus();
 	if (!ASSERT_GT(cpu_nr, 0, "libbpf_num_possible_cpus"))
@@ -87,8 +88,11 @@ void test_percpu_hash_refcounted_kptr_refcount_leak(void)
 	if (!ASSERT_EQ(opts.retval, 2, "opts.retval"))
 		goto out;
 
-	err = bpf_map__update_elem(map, &key, sizeof(key), values, values_sz, 0);
-	if (!ASSERT_OK(err, "bpf_map__update_elem"))
+	fd = bpf_program__fd(skel->progs.clear_percpu_hash_kptr);
+	err = bpf_prog_test_run_opts(fd, &syscall_opts);
+	if (!ASSERT_OK(err, "bpf_prog_test_run_opts"))
+		goto out;
+	if (!ASSERT_EQ(syscall_opts.retval, 1, "syscall_opts.retval"))
 		goto out;
 
 	fd = bpf_program__fd(skel->progs.check_percpu_hash_refcount);
diff --git a/tools/testing/selftests/bpf/prog_tests/verifier.c b/tools/testing/selftests/bpf/prog_tests/verifier.c
index 06cd24e37b3f..e67140c24b74 100644
--- a/tools/testing/selftests/bpf/prog_tests/verifier.c
+++ b/tools/testing/selftests/bpf/prog_tests/verifier.c
@@ -77,6 +77,7 @@
 #include "verifier_precision.skel.h"
 #include "verifier_prevent_map_lookup.skel.h"
 #include "verifier_private_stack.skel.h"
+#include "verifier_ptr_to_buf.skel.h"
 #include "verifier_raw_stack.skel.h"
 #include "verifier_raw_tp_writable.skel.h"
 #include "verifier_reg_equal.skel.h"
@@ -225,6 +226,7 @@ void test_verifier_or_jmp32_k(void)           { RUN(verifier_or_jmp32_k); }
 void test_verifier_precision(void)            { RUN(verifier_precision); }
 void test_verifier_prevent_map_lookup(void)   { RUN(verifier_prevent_map_lookup); }
 void test_verifier_private_stack(void)        { RUN(verifier_private_stack); }
+void test_verifier_ptr_to_buf(void)           { RUN(verifier_ptr_to_buf); }
 void test_verifier_raw_stack(void)            { RUN(verifier_raw_stack); }
 void test_verifier_raw_tp_writable(void)      { RUN(verifier_raw_tp_writable); }
 void test_verifier_reg_equal(void)            { RUN(verifier_reg_equal); }
diff --git a/tools/testing/selftests/bpf/prog_tests/verifier_log.c b/tools/testing/selftests/bpf/prog_tests/verifier_log.c
index c01c0114af1b..4542bb586d72 100644
--- a/tools/testing/selftests/bpf/prog_tests/verifier_log.c
+++ b/tools/testing/selftests/bpf/prog_tests/verifier_log.c
@@ -317,6 +317,7 @@ static void verif_btf_log_subtest(bool bad_btf)
 	res = load_btf(&opts, true);
 	ASSERT_EQ(res, -ENOSPC, "half_log_fd");
 	ASSERT_EQ(strlen(logs.buf), 24, "log_fixed_25");
+	strscpy(op_name, "log_fixed", sizeof(op_name));
 	ASSERT_STRNEQ(logs.buf, logs.reference, 24, op_name);
 
 	/* validate rolling verifier log logic: try all variations of log buf
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_task_vmas.c b/tools/testing/selftests/bpf/progs/bpf_iter_task_vmas.c
index d64ba7ddaed5..d7fb561ed4fb 100644
--- a/tools/testing/selftests/bpf/progs/bpf_iter_task_vmas.c
+++ b/tools/testing/selftests/bpf/progs/bpf_iter_task_vmas.c
@@ -52,7 +52,7 @@ SEC("iter/task_vma") int proc_maps(struct bpf_iter__task_vma *ctx)
 		bpf_d_path(&file->f_path, d_path_buf, D_PATH_BUF_SIZE);
 
 		BPF_SEQ_PRINTF(seq, "%08llx ", vma->vm_pgoff << 12);
-		BPF_SEQ_PRINTF(seq, "%02x:%02x %u", MAJOR(dev), MINOR(dev),
+		BPF_SEQ_PRINTF(seq, "%02x:%02x %llu", MAJOR(dev), MINOR(dev),
 			       file->f_inode->i_ino);
 		BPF_SEQ_PRINTF(seq, "\t%s\n", d_path_buf);
 	} else {
diff --git a/tools/testing/selftests/bpf/progs/cpumask_success.c b/tools/testing/selftests/bpf/progs/cpumask_success.c
index 0e04c31b91c0..774706e7b058 100644
--- a/tools/testing/selftests/bpf/progs/cpumask_success.c
+++ b/tools/testing/selftests/bpf/progs/cpumask_success.c
@@ -866,7 +866,7 @@ int BPF_PROG(test_populate, struct task_struct *task, u64 clone_flags)
 	 * access NR_CPUS, the upper bound for nr_cpus, so we infer
 	 * it from the size of cpumask_t.
 	 */
-	if (nr_cpus < 0 || nr_cpus >= CPUMASK_TEST_MASKLEN * 8) {
+	if (nr_cpus < 0 || nr_cpus > CPUMASK_TEST_MASKLEN * 8) {
 		err = 3;
 		goto out;
 	}
diff --git a/tools/testing/selftests/bpf/progs/file_reader.c b/tools/testing/selftests/bpf/progs/file_reader.c
index 462712ff3b8a..aa2c05cce2b3 100644
--- a/tools/testing/selftests/bpf/progs/file_reader.c
+++ b/tools/testing/selftests/bpf/progs/file_reader.c
@@ -50,7 +50,7 @@ int on_open_expect_fault(void *c)
 		goto out;
 
 	local_err = bpf_dynptr_read(tmp_buf, user_buf_sz, &dynptr, user_buf_sz, 0);
-	if (local_err == -EFAULT) { /* Expect page fault */
+	if (local_err == -EFAULT || local_err == 0) { /* Expect page fault or success */
 		local_err = 0;
 		run_success = 1;
 	}
diff --git a/tools/testing/selftests/bpf/progs/htab_update.c b/tools/testing/selftests/bpf/progs/htab_update.c
index 195d3b2fba00..62c1b1325ec2 100644
--- a/tools/testing/selftests/bpf/progs/htab_update.c
+++ b/tools/testing/selftests/bpf/progs/htab_update.c
@@ -22,8 +22,8 @@ struct {
 int pid = 0;
 int update_err = 0;
 
-SEC("?fentry/bpf_obj_free_fields")
-int bpf_obj_free_fields(void *ctx)
+SEC("?fentry/bpf_obj_cancel_fields")
+int bpf_obj_cancel_fields(void *ctx)
 {
 	__u32 key = 0;
 	struct val value = { .payload = 1 };
diff --git a/tools/testing/selftests/bpf/progs/linked_list.c b/tools/testing/selftests/bpf/progs/linked_list.c
index 421f40835acd..fa97faa5358b 100644
--- a/tools/testing/selftests/bpf/progs/linked_list.c
+++ b/tools/testing/selftests/bpf/progs/linked_list.c
@@ -290,6 +290,77 @@ int test_list_in_list(struct bpf_spin_lock *lock, struct bpf_list_head *head)
 	return list_in_list(lock, head, true);
 }
 
+#define MAX_LIST_CLEAR_NODES 256
+
+static __always_inline
+int clear_list(struct bpf_spin_lock *lock, struct bpf_list_head *head)
+{
+	struct bpf_list_node *n;
+	int i;
+
+	for (i = 0; i < MAX_LIST_CLEAR_NODES; i++) {
+		bpf_spin_lock(lock);
+		n = bpf_list_pop_front(head);
+		bpf_spin_unlock(lock);
+		if (!n)
+			return 0;
+		bpf_obj_drop(container_of(n, struct foo, node2));
+	}
+	return 1;
+}
+
+SEC("syscall")
+int clear_map_list(void *ctx)
+{
+	struct map_value *v;
+
+	v = bpf_map_lookup_elem(&array_map, &(int){0});
+	if (!v)
+		return 1;
+	return clear_list(&v->lock, &v->head);
+}
+
+SEC("syscall")
+int clear_inner_map_list(void *ctx)
+{
+	struct map_value *v;
+	void *map;
+
+	map = bpf_map_lookup_elem(&map_of_maps, &(int){0});
+	if (!map)
+		return 1;
+	v = bpf_map_lookup_elem(map, &(int){0});
+	if (!v)
+		return 1;
+	return clear_list(&v->lock, &v->head);
+}
+
+SEC("syscall")
+int clear_global_list(void *ctx)
+{
+	return clear_list(&glock, &ghead);
+}
+
+SEC("syscall")
+int clear_global_nested_list(void *ctx)
+{
+	return clear_list(&ghead_nested.inner.lock, &ghead_nested.inner.head);
+}
+
+SEC("syscall")
+int clear_global_array_list(void *ctx)
+{
+	int ret;
+
+	ret = clear_list(&glock_c, &ghead_array[0]);
+	if (ret)
+		return ret;
+	ret = clear_list(&glock_c, &ghead_array[1]);
+	if (ret)
+		return ret;
+	return clear_list(&glock_c, &ghead_array_one[0]);
+}
+
 SEC("tc")
 int map_list_push_pop(void *ctx)
 {
diff --git a/tools/testing/selftests/bpf/progs/refcounted_kptr.c b/tools/testing/selftests/bpf/progs/refcounted_kptr.c
index c847398837cc..9837dccfc141 100644
--- a/tools/testing/selftests/bpf/progs/refcounted_kptr.c
+++ b/tools/testing/selftests/bpf/progs/refcounted_kptr.c
@@ -615,13 +615,31 @@ int percpu_hash_refcount_leak(void *ctx)
 	struct map_value *v;
 	int key = 0;
 
-	v = bpf_map_lookup_elem(&percpu_hash, &key);
+	v = bpf_map_lookup_percpu_elem(&percpu_hash, &key, 0);
 	if (!v)
 		return 0;
 
 	return __insert_in_list(&head, &lock, &v->node);
 }
 
+SEC("syscall")
+int clear_percpu_hash_kptr(void *ctx)
+{
+	struct node_data *n;
+	struct map_value *v;
+	int key = 0;
+
+	v = bpf_map_lookup_percpu_elem(&percpu_hash, &key, 0);
+	if (!v)
+		return 0;
+
+	n = bpf_kptr_xchg(&v->node, NULL);
+	if (!n)
+		return 0;
+	bpf_obj_drop(n);
+	return probe_read_refcount();
+}
+
 SEC("tc")
 int check_percpu_hash_refcount(void *ctx)
 {
diff --git a/tools/testing/selftests/bpf/progs/test_bpf_nf.c b/tools/testing/selftests/bpf/progs/test_bpf_nf.c
index 076fbf03a126..df43649ecb78 100644
--- a/tools/testing/selftests/bpf/progs/test_bpf_nf.c
+++ b/tools/testing/selftests/bpf/progs/test_bpf_nf.c
@@ -10,6 +10,8 @@
 #define EINVAL 22
 #define ENOENT 2
 
+#define CT_OPTS_ERROR_GUARD 0x12345678
+
 #define NF_CT_ZONE_DIR_ORIG (1 << IP_CT_DIR_ORIGINAL)
 #define NF_CT_ZONE_DIR_REPL (1 << IP_CT_DIR_REPLY)
 
@@ -19,6 +21,8 @@ int test_einval_reserved = 0;
 int test_einval_reserved_new = 0;
 int test_einval_netns_id = 0;
 int test_einval_len_opts = 0;
+int test_einval_len_opts_small_lookup = 0;
+int test_einval_len_opts_small_alloc = 0;
 int test_eproto_l4proto = 0;
 int test_enonet_netns_id = 0;
 int test_enoent_lookup = 0;
@@ -124,6 +128,28 @@ nf_ct_test(struct nf_conn *(*lookup_fn)(void *, struct bpf_sock_tuple *, u32,
 	else
 		test_einval_len_opts = opts_def.error;
 
+	opts_def.error = CT_OPTS_ERROR_GUARD;
+	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		       sizeof(opts_def.netns_id));
+	if (ct) {
+		bpf_ct_release(ct);
+		test_einval_len_opts_small_lookup = -EINVAL;
+	} else {
+		test_einval_len_opts_small_lookup = opts_def.error;
+	}
+
+	opts_def.error = CT_OPTS_ERROR_GUARD;
+	ct = alloc_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
+		      sizeof(opts_def.netns_id));
+	if (ct) {
+		ct = bpf_ct_insert_entry(ct);
+		if (ct)
+			bpf_ct_release(ct);
+		test_einval_len_opts_small_alloc = -EINVAL;
+	} else {
+		test_einval_len_opts_small_alloc = opts_def.error;
+	}
+
 	opts_def.l4proto = IPPROTO_ICMP;
 	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
 		       sizeof(opts_def));
diff --git a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c
index 32127f1cd687..30f1de458669 100644
--- a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c
+++ b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c
@@ -6,6 +6,7 @@
  * modify it under the terms of version 2 of the GNU General Public
  * License as published by the Free Software Foundation.
  */
+#define BPF_NO_KFUNC_PROTOTYPES
 #include "vmlinux.h"
 #include <bpf/bpf_core_read.h>
 #include <bpf/bpf_helpers.h>
@@ -36,12 +37,10 @@ enum bpf_fou_encap_type___local {
 	FOU_BPF_ENCAP_GUE___local,
 };
 
-struct bpf_fou_encap;
-
 int bpf_skb_set_fou_encap(struct __sk_buff *skb_ctx,
-			  struct bpf_fou_encap *encap, int type) __ksym;
+			  struct bpf_fou_encap___local *encap, int type) __ksym;
 int bpf_skb_get_fou_encap(struct __sk_buff *skb_ctx,
-			  struct bpf_fou_encap *encap) __ksym;
+			  struct bpf_fou_encap___local *encap) __ksym;
 struct xfrm_state *
 bpf_xdp_get_xfrm_state(struct xdp_md *ctx, struct bpf_xfrm_state_opts *opts,
 		       u32 opts__sz) __ksym;
@@ -781,7 +780,7 @@ int ipip_gue_set_tunnel(struct __sk_buff *skb)
 	encap.sport = 0;
 	encap.dport = bpf_htons(5555);
 
-	ret = bpf_skb_set_fou_encap(skb, (struct bpf_fou_encap *)&encap,
+	ret = bpf_skb_set_fou_encap(skb, &encap,
 				    bpf_core_enum_value(enum bpf_fou_encap_type___local,
 							FOU_BPF_ENCAP_GUE___local));
 	if (ret < 0) {
@@ -820,7 +819,7 @@ int ipip_fou_set_tunnel(struct __sk_buff *skb)
 	encap.sport = 0;
 	encap.dport = bpf_htons(5555);
 
-	ret = bpf_skb_set_fou_encap(skb, (struct bpf_fou_encap *)&encap,
+	ret = bpf_skb_set_fou_encap(skb, &encap,
 				    FOU_BPF_ENCAP_FOU___local);
 	if (ret < 0) {
 		log_err(ret);
@@ -843,7 +842,7 @@ int ipip_encap_get_tunnel(struct __sk_buff *skb)
 		return TC_ACT_SHOT;
 	}
 
-	ret = bpf_skb_get_fou_encap(skb, (struct bpf_fou_encap *)&encap);
+	ret = bpf_skb_get_fou_encap(skb, &encap);
 	if (ret < 0) {
 		log_err(ret);
 		return TC_ACT_SHOT;
diff --git a/tools/testing/selftests/bpf/progs/verifier_bounds.c b/tools/testing/selftests/bpf/progs/verifier_bounds.c
index c1ae013dee29..bc431f46aafd 100644
--- a/tools/testing/selftests/bpf/progs/verifier_bounds.c
+++ b/tools/testing/selftests/bpf/progs/verifier_bounds.c
@@ -1890,25 +1890,25 @@ __naked void bounds_refinement_tnum_umax(void *ctx)
 /* This test covers the bounds deduction when the u64 range and the tnum
  * overlap only at umin. After instruction 3, the ranges look as follows:
  *
- * 0    umin=0xe00     umax=0xeff                              U64_MAX
+ * 0    umin=0xe1      umax=0xf0                               U64_MAX
  * |    [xxxxxxxxxxxxxx]                                       |
  * |----------------------------|------------------------------|
  * |    x               x                                      | tnum values
  *
- * The verifier can therefore deduce that the R0=0xe0=224.
+ * The verifier can therefore deduce that the R0=0xe1=225.
  */
 SEC("socket")
 __description("bounds refinement with single-value tnum on umin")
-__msg("3: (15) if r0 == 0xf0 {{.*}} R0=224")
+__msg("3: (15) if r0 == 0xf1 {{.*}} R0=225")
 __success __log_level(2)
 __naked void bounds_refinement_tnum_umin(void *ctx)
 {
 	asm volatile("			\
 	call %[bpf_get_prandom_u32];	\
-	r0 |= 0xe0;			\
-	r0 &= 0xf0;			\
-	if r0 == 0xf0 goto +2;		\
-	if r0 == 0xe0 goto +1;		\
+	r0 |= 0xe1;			\
+	r0 &= 0xf1;			\
+	if r0 == 0xf1 goto +2;		\
+	if r0 == 0xe1 goto +1;		\
 	r10 = 0;			\
 	exit;				\
 "	:
diff --git a/tools/testing/selftests/bpf/progs/verifier_ptr_to_buf.c b/tools/testing/selftests/bpf/progs/verifier_ptr_to_buf.c
new file mode 100644
index 000000000000..12cf24db46a0
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/verifier_ptr_to_buf.c
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <vmlinux.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+SEC("iter/bpf_map_elem")
+__description("PTR_TO_BUF: reject negative const offset")
+__failure
+__msg("invalid negative rdwr buffer offset")
+__naked void ptr_to_buf_reject_negative_const_offset(void)
+{
+	asm volatile ("r0 = 0;					\
+	 r2 = *(u64 *)(r1 + %[value_off]);			\
+	 if r2 == 0 goto l0_%=;					\
+	 r2 += -8;						\
+	 r0 = *(u64 *)(r2 + 0);					\
+l0_%=:								\
+	 exit;							\
+	"
+	:
+	: __imm_const(value_off,
+		      offsetof(struct bpf_iter__bpf_map_elem, value))
+	: __clobber_all);
+}
+
+char _license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/progs/verifier_raw_tp_writable.c b/tools/testing/selftests/bpf/progs/verifier_raw_tp_writable.c
index 14a0172e2141..4055a6443bc2 100644
--- a/tools/testing/selftests/bpf/progs/verifier_raw_tp_writable.c
+++ b/tools/testing/selftests/bpf/progs/verifier_raw_tp_writable.c
@@ -47,4 +47,20 @@ l0_%=:	/* shift the buffer pointer to a variable location */\
 	: __clobber_all);
 }
 
+SEC("raw_tracepoint.w")
+__description("raw_tracepoint_writable: reject negative const offset")
+__failure
+__msg("invalid negative tracepoint buffer offset")
+__naked void tracepoint_writable_reject_negative_const_offset(void)
+{
+	asm volatile ("					\
+	r6 = *(u64 *)(r1 + 0);				\
+	r6 += -8;					\
+	r0 = *(u64 *)(r6 + 0);				\
+	exit;						\
+"	:
+	:
+	: __clobber_all);
+}
+
 char _license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/progs/xdp_flowtable.c b/tools/testing/selftests/bpf/progs/xdp_flowtable.c
index 7fdc7b23ee74..e67daa02749d 100644
--- a/tools/testing/selftests/bpf/progs/xdp_flowtable.c
+++ b/tools/testing/selftests/bpf/progs/xdp_flowtable.c
@@ -15,7 +15,10 @@ struct bpf_flowtable_opts___local {
 	s32 error;
 };
 
-struct flow_offload_tuple_rhash *
+struct flow_offload_tuple_rhash___local {
+};
+
+struct flow_offload_tuple_rhash___local *
 bpf_xdp_flow_lookup(struct xdp_md *, struct bpf_fib_lookup *,
 		    struct bpf_flowtable_opts___local *, u32) __ksym;
 
@@ -67,7 +70,7 @@ int xdp_flowtable_do_lookup(struct xdp_md *ctx)
 {
 	void *data_end = (void *)(long)ctx->data_end;
 	struct bpf_flowtable_opts___local opts = {};
-	struct flow_offload_tuple_rhash *tuplehash;
+	struct flow_offload_tuple_rhash___local *tuplehash;
 	struct bpf_fib_lookup tuple = {
 		.ifindex = ctx->ingress_ifindex,
 	};
diff --git a/tools/testing/selftests/bpf/vmtest.sh b/tools/testing/selftests/bpf/vmtest.sh
index 2f869daf8a06..9ca802285393 100755
--- a/tools/testing/selftests/bpf/vmtest.sh
+++ b/tools/testing/selftests/bpf/vmtest.sh
@@ -382,7 +382,7 @@ main()
 	local exit_command="poweroff -f"
 	local debug_shell="no"
 
-	while getopts ':hskl:id:j:' opt; do
+	while getopts ':hsl:id:j:' opt; do
 		case ${opt} in
 		l)
 			LOCAL_ROOTFS_IMAGE="$OPTARG"
diff --git a/tools/testing/selftests/drivers/net/hw/tso.py b/tools/testing/selftests/drivers/net/hw/tso.py
index bb675e3dac88..abc575e4b340 100755
--- a/tools/testing/selftests/drivers/net/hw/tso.py
+++ b/tools/testing/selftests/drivers/net/hw/tso.py
@@ -187,28 +187,24 @@ def query_nic_features(cfg) -> None:
         cfg.wanted_features.add(f["name"])
 
     cfg.hw_features = set()
-    hw_all_features_cmd = ""
     for f in features["hw"]["bits"]["bit"]:
         if f.get("value", False):
-            feature = f["name"]
-            cfg.hw_features.add(feature)
-            hw_all_features_cmd += f" {feature} on"
-    try:
-        ethtool(f"-K {cfg.ifname} {hw_all_features_cmd}")
-    except Exception as e:
-        ksft_pr(f"WARNING: failure enabling all hw features: {e}")
-        ksft_pr("partial gso feature detection may be impacted")
+            cfg.hw_features.add(f["name"])
 
     # Check which features are supported via GSO partial
     cfg.partial_features = set()
     if 'tx-gso-partial' in cfg.hw_features:
+        seg_features = {f for f in cfg.hw_features if "segmentation" in f}
+        ethtool(f"-K {cfg.ifname} " +
+                " ".join(f"{f} on" for f in seg_features))
+
         ethtool(f"-K {cfg.ifname} tx-gso-partial off")
 
         no_partial = set()
         features = cfg.ethnl.features_get({"header": {"dev-index": cfg.ifindex}})
         for f in features["active"]["bits"]["bit"]:
             no_partial.add(f["name"])
-        cfg.partial_features = cfg.hw_features - no_partial
+        cfg.partial_features = seg_features - no_partial
         ethtool(f"-K {cfg.ifname} tx-gso-partial on")
 
     restore_wanted_features(cfg)
diff --git a/tools/testing/selftests/ftrace/test.d/00basic/test_ownership.tc b/tools/testing/selftests/ftrace/test.d/00basic/test_ownership.tc
index e71cc3ad0bdf..6d00d3c0f493 100644
--- a/tools/testing/selftests/ftrace/test.d/00basic/test_ownership.tc
+++ b/tools/testing/selftests/ftrace/test.d/00basic/test_ownership.tc
@@ -6,7 +6,7 @@
 original_group=`stat -c "%g" .`
 original_owner=`stat -c "%u" .`
 
-local mount_point=$(get_mount_point)
+mount_point=$(get_mount_point)
 
 mount_options=$(get_mnt_options "$mount_point")
 
diff --git a/tools/testing/selftests/ftrace/test.d/00basic/trace_marker_raw.tc b/tools/testing/selftests/ftrace/test.d/00basic/trace_marker_raw.tc
index 8e905d4fe6dd..f985ff391463 100644
--- a/tools/testing/selftests/ftrace/test.d/00basic/trace_marker_raw.tc
+++ b/tools/testing/selftests/ftrace/test.d/00basic/trace_marker_raw.tc
@@ -36,15 +36,23 @@ make_str() {
 
 	data=`printf -- 'X%.0s' $(seq $cnt)`
 
-	printf "${val}${data}"
+	# Return escape-sequence text (e.g. "\003\000..."); the caller
+	# converts to binary. Shell command substitution strips NUL bytes,
+	# so the binary form cannot survive being captured into a variable.
+	printf '%s' "${val}${data}"
 }
 
 write_buffer() {
 	id=$1
 	size=$2
 
-	# write the string into the raw marker
-	make_str $id $size > trace_marker_raw
+	str=`make_str $id $size`
+	len=`printf "$str" | wc -c`
+	# Pipe through dd to ensure a single atomic write() syscall
+	# on architectures with 64K pages, where shell's printf builtin
+	# uses stdio buffering which may split the output into multiple
+	# writes.
+	printf "$str" | dd of=trace_marker_raw bs=$len iflag=fullblock
 }
 
 
diff --git a/tools/testing/selftests/gpio/.gitignore b/tools/testing/selftests/gpio/.gitignore
index ededb077a3a6..16f74de479f1 100644
--- a/tools/testing/selftests/gpio/.gitignore
+++ b/tools/testing/selftests/gpio/.gitignore
@@ -2,3 +2,4 @@
 gpio-mockup-cdev
 gpio-chip-info
 gpio-line-name
+gpio-cdev-uaf
diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
index 50ec9e0406ab..357c6eb5ff5e 100644
--- a/tools/testing/selftests/hid/Makefile
+++ b/tools/testing/selftests/hid/Makefile
@@ -24,7 +24,7 @@ CXX ?= $(CROSS_COMPILE)g++
 
 HOSTPKG_CONFIG := pkg-config
 
-CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
+CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT) $(KHDR_INCLUDES)
 CFLAGS += -I$(OUTPUT)/tools/include
 
 LDLIBS += -lelf -lz -lrt -lpthread
diff --git a/tools/testing/selftests/hid/hid_bpf.c b/tools/testing/selftests/hid/hid_bpf.c
index 1e979fb3542b..b851339308c2 100644
--- a/tools/testing/selftests/hid/hid_bpf.c
+++ b/tools/testing/selftests/hid/hid_bpf.c
@@ -86,6 +86,20 @@ static void load_programs(const struct test_program programs[],
 	self->skel = hid__open();
 	ASSERT_OK_PTR(self->skel) TEARDOWN_LOG("Error while calling hid__open");
 
+	/*
+	 * Disable all struct_ops maps by default so libbpf does not autoload
+	 * programs referenced by maps that are unrelated to the current test.
+	 */
+	bpf_object__for_each_map(iter_map, *self->skel->skeleton->obj) {
+		if (bpf_map__type(iter_map) == BPF_MAP_TYPE_STRUCT_OPS) {
+			err = bpf_map__set_autocreate(iter_map, false);
+			ASSERT_OK(err) TH_LOG("can not disable struct_ops map '%s'",
+					      bpf_map__name(iter_map));
+		}
+
+		bpf_map__set_autoattach(iter_map, false);
+	}
+
 	for (int i = 0; i < progs_count; i++) {
 		struct bpf_program *prog;
 		struct bpf_map *map;
@@ -102,6 +116,10 @@ static void load_programs(const struct test_program programs[],
 		ASSERT_OK_PTR(map) TH_LOG("can not find struct_ops by name '%s'",
 					  programs[i].name + 4);
 
+		err = bpf_map__set_autocreate(map, true);
+		ASSERT_OK(err) TH_LOG("can not enable struct_ops map '%s'",
+				      programs[i].name + 4);
+
 		/* hid_id is the first field of struct hid_bpf_ops */
 		ops_hid_id = bpf_map__initial_value(map, NULL);
 		ASSERT_OK_PTR(ops_hid_id) TH_LOG("unable to retrieve struct_ops data");
@@ -109,13 +127,6 @@ static void load_programs(const struct test_program programs[],
 		*ops_hid_id = self->hid.hid_id;
 	}
 
-	/* we disable the auto-attach feature of all maps because we
-	 * only want the tested one to be manually attached in the next
-	 * call to bpf_map__attach_struct_ops()
-	 */
-	bpf_object__for_each_map(iter_map, *self->skel->skeleton->obj)
-		bpf_map__set_autoattach(iter_map, false);
-
 	err = hid__load(self->skel);
 	ASSERT_OK(err) TH_LOG("hid_skel_load failed: %d", err);
 
@@ -887,6 +898,17 @@ TEST_F(hid_bpf, test_rdesc_fixup)
 	ASSERT_EQ(rpt_desc.value[4], 0x42);
 }
 
+TEST_F(hid_bpf, test_rdesc_fixup_get_data_overflow)
+{
+	const struct test_program progs[] = {
+		{ .name = "hid_rdesc_fixup_get_data_overflow" },
+	};
+
+	LOAD_PROGRAMS(progs);
+
+	ASSERT_EQ(self->skel->bss->get_data_overflow_check, 1);
+}
+
 static int libbpf_print_fn(enum libbpf_print_level level,
 			   const char *format, va_list args)
 {
diff --git a/tools/testing/selftests/hid/progs/hid.c b/tools/testing/selftests/hid/progs/hid.c
index 5ecc845ef792..b21fbb13c926 100644
--- a/tools/testing/selftests/hid/progs/hid.c
+++ b/tools/testing/selftests/hid/progs/hid.c
@@ -13,6 +13,7 @@ struct attach_prog_args {
 
 __u64 callback_check = 52;
 __u64 callback2_check = 52;
+__u64 get_data_overflow_check;
 
 SEC("?struct_ops/hid_device_event")
 int BPF_PROG(hid_first_event, struct hid_bpf_ctx *hid_ctx, enum hid_report_type type)
@@ -240,6 +241,20 @@ struct hid_bpf_ops rdesc_fixup = {
 	.hid_rdesc_fixup = (void *)hid_rdesc_fixup,
 };
 
+SEC("?struct_ops.s/hid_rdesc_fixup")
+int BPF_PROG(hid_rdesc_fixup_get_data_overflow, struct hid_bpf_ctx *hid_ctx)
+{
+	if (!hid_bpf_get_data(hid_ctx, 2 /* offset */, ~0ULL /* size */))
+		get_data_overflow_check = 1;
+
+	return 0;
+}
+
+SEC(".struct_ops.link")
+struct hid_bpf_ops rdesc_fixup_get_data_overflow = {
+	.hid_rdesc_fixup = (void *)hid_rdesc_fixup_get_data_overflow,
+};
+
 SEC("?struct_ops/hid_device_event")
 int BPF_PROG(hid_test_insert1, struct hid_bpf_ctx *hid_ctx, enum hid_report_type type)
 {
diff --git a/tools/testing/selftests/landlock/scoped_signal_test.c b/tools/testing/selftests/landlock/scoped_signal_test.c
index d8bf33417619..2d37d0c06c06 100644
--- a/tools/testing/selftests/landlock/scoped_signal_test.c
+++ b/tools/testing/selftests/landlock/scoped_signal_test.c
@@ -249,12 +249,12 @@ TEST_F(scoped_domains, check_access_signal)
 		_metadata->exit_code = KSFT_FAIL;
 }
 
-enum thread_return {
-	THREAD_INVALID = 0,
-	THREAD_SUCCESS = 1,
-	THREAD_ERROR = 2,
-	THREAD_TEST_FAILED = 3,
-};
+/* clang-format off */
+#define THREAD_INVALID		((void *)0)
+#define THREAD_SUCCESS		((void *)1)
+#define THREAD_ERROR		((void *)2)
+#define THREAD_TEST_FAILED	((void *)3)
+/* clang-format on */
 
 static void *thread_sync(void *arg)
 {
@@ -262,15 +262,15 @@ static void *thread_sync(void *arg)
 	char buf;
 
 	if (read(pipe_read, &buf, 1) != 1)
-		return (void *)THREAD_ERROR;
+		return THREAD_ERROR;
 
-	return (void *)THREAD_SUCCESS;
+	return THREAD_SUCCESS;
 }
 
 TEST(signal_scoping_thread_before)
 {
 	pthread_t no_sandbox_thread;
-	enum thread_return ret = THREAD_INVALID;
+	void *ret = THREAD_INVALID;
 	int thread_pipe[2];
 
 	drop_caps(_metadata);
@@ -285,7 +285,7 @@ TEST(signal_scoping_thread_before)
 	EXPECT_EQ(0, pthread_kill(no_sandbox_thread, 0));
 	EXPECT_EQ(1, write(thread_pipe[1], ".", 1));
 
-	EXPECT_EQ(0, pthread_join(no_sandbox_thread, (void **)&ret));
+	EXPECT_EQ(0, pthread_join(no_sandbox_thread, &ret));
 	EXPECT_EQ(THREAD_SUCCESS, ret);
 
 	EXPECT_EQ(0, close(thread_pipe[0]));
@@ -295,7 +295,7 @@ TEST(signal_scoping_thread_before)
 TEST(signal_scoping_thread_after)
 {
 	pthread_t scoped_thread;
-	enum thread_return ret = THREAD_INVALID;
+	void *ret = THREAD_INVALID;
 	int thread_pipe[2];
 
 	drop_caps(_metadata);
@@ -310,7 +310,7 @@ TEST(signal_scoping_thread_after)
 	EXPECT_EQ(0, pthread_kill(scoped_thread, 0));
 	EXPECT_EQ(1, write(thread_pipe[1], ".", 1));
 
-	EXPECT_EQ(0, pthread_join(scoped_thread, (void **)&ret));
+	EXPECT_EQ(0, pthread_join(scoped_thread, &ret));
 	EXPECT_EQ(THREAD_SUCCESS, ret);
 
 	EXPECT_EQ(0, close(thread_pipe[0]));
@@ -327,20 +327,20 @@ void *thread_setuid(void *ptr)
 	char buf;
 
 	if (read(arg->pipe_read, &buf, 1) != 1)
-		return (void *)THREAD_ERROR;
+		return THREAD_ERROR;
 
 	/* libc's setuid() should update all thread's credentials. */
 	if (getuid() != arg->new_uid)
-		return (void *)THREAD_TEST_FAILED;
+		return THREAD_TEST_FAILED;
 
-	return (void *)THREAD_SUCCESS;
+	return THREAD_SUCCESS;
 }
 
 TEST(signal_scoping_thread_setuid)
 {
 	struct thread_setuid_args arg;
 	pthread_t no_sandbox_thread;
-	enum thread_return ret = THREAD_INVALID;
+	void *ret = THREAD_INVALID;
 	int pipe_parent[2];
 	int prev_uid;
 
@@ -367,7 +367,7 @@ TEST(signal_scoping_thread_setuid)
 	EXPECT_EQ(arg.new_uid, getuid());
 	EXPECT_EQ(1, write(pipe_parent[1], ".", 1));
 
-	EXPECT_EQ(0, pthread_join(no_sandbox_thread, (void **)&ret));
+	EXPECT_EQ(0, pthread_join(no_sandbox_thread, &ret));
 	EXPECT_EQ(THREAD_SUCCESS, ret);
 
 	clear_cap(_metadata, CAP_SETUID);
@@ -400,6 +400,24 @@ static int setup_signal_handler(int signal)
 	return sigaction(SIGURG, &sa, NULL);
 }
 
+/*
+ * MSG_OOB might be disabled in the kernel via the CONFIG_AF_UNIX_OOB
+ * switch, so this function can be used for probing for its availability.
+ */
+static bool has_af_unix_oob(void)
+{
+	bool available = false;
+	int sp[2];
+
+	if (socketpair(AF_UNIX, SOCK_STREAM, 0, sp) == 0) {
+		available = (send(sp[0], ".", 1, MSG_OOB) == 1);
+		close(sp[0]);
+		close(sp[1]);
+	}
+
+	return available;
+}
+
 /* clang-format off */
 FIXTURE(fown) {};
 /* clang-format on */
@@ -462,6 +480,9 @@ TEST_F(fown, sigurg_socket)
 	int pipe_parent[2], pipe_child[2];
 	pid_t child;
 
+	if (!has_af_unix_oob())
+		SKIP(return, "CONFIG_AF_UNIX_OOB / MSG_OOB not available");
+
 	memset(&server_address, 0, sizeof(server_address));
 	set_unix_address(&server_address, 0);
 
@@ -559,4 +580,186 @@ TEST_F(fown, sigurg_socket)
 		_metadata->exit_code = KSFT_FAIL;
 }
 
+/*
+ * Checks that LANDLOCK_SCOPE_SIGNAL is enforced on the asynchronous SIGIO
+ * delivery path (fcntl(F_SETOWN)) when the file owner is a process group.
+ *
+ * A sandboxed process sitting at the head of its process group's PID hlist (the
+ * default position right after fork()) used to escape the fcntl(F_SETOWN,
+ * -pgrp) domain recording: pid_task(pgrp, PIDTYPE_PGID) resolved to the process
+ * itself, so the same-thread-group exemption skipped recording its Landlock
+ * domain.  At SIGIO time that domain was then unset and the signal fanned out
+ * to every group member, including non-sandboxed processes outside the domain.
+ */
+TEST(sigio_to_pgid_members)
+{
+	int trigger[2], sync_child[2];
+	char buf;
+	pid_t child;
+	int status, i;
+
+	drop_caps(_metadata);
+
+	/*
+	 * Isolates the test in its own process group so the SIGIO fan-out stays
+	 * bounded to this parent and the child forked below.
+	 */
+	ASSERT_EQ(0, setpgid(0, 0));
+
+	/* The non-sandboxed parent is the protected (out-of-domain) target. */
+	ASSERT_EQ(0, setup_signal_handler(SIGURG));
+	signal_received = 0;
+
+	ASSERT_EQ(0, pipe2(trigger, O_CLOEXEC));
+	ASSERT_EQ(0, pipe2(sync_child, O_CLOEXEC));
+
+	child = fork();
+	ASSERT_LE(0, child);
+	if (child == 0) {
+		/*
+		 * The child inherits the parent's new process group and, just
+		 * attached with hlist_add_head_rcu(), is now the head of the
+		 * pgid hlist: this is the case that used to skip the recording.
+		 */
+		EXPECT_EQ(0, close(sync_child[0]));
+
+		/* In-domain positive control: the child must be signaled. */
+		ASSERT_EQ(0, setup_signal_handler(SIGURG));
+		signal_received = 0;
+
+		create_scoped_domain(_metadata, LANDLOCK_SCOPE_SIGNAL);
+
+		/* Owns the SIGIO source for the whole process group. */
+		ASSERT_EQ(0, fcntl(trigger[0], F_SETSIG, SIGURG));
+		ASSERT_EQ(0, fcntl(trigger[0], F_SETOWN, -getpgrp()));
+		ASSERT_EQ(0, fcntl(trigger[0], F_SETFL, O_ASYNC));
+
+		/* Fans SIGURG out to every member of the process group. */
+		ASSERT_EQ(1, write(trigger[1], ".", 1));
+
+		/*
+		 * The sandboxed child is in its own domain and must always be
+		 * signaled: this proves the SIGIO actually fired.
+		 */
+		for (i = 0; i < 1000 && !signal_received; i++)
+			usleep(1000);
+		EXPECT_EQ(1, signal_received);
+
+		ASSERT_EQ(1, write(sync_child[1], ".", 1));
+		EXPECT_EQ(0, close(sync_child[1]));
+
+		_exit(_metadata->exit_code);
+		return;
+	}
+	EXPECT_EQ(0, close(sync_child[1]));
+	EXPECT_EQ(0, close(trigger[0]));
+	EXPECT_EQ(0, close(trigger[1]));
+
+	/* Waits for the child to generate the SIGIO. */
+	ASSERT_EQ(1, read(sync_child[0], &buf, 1));
+	EXPECT_EQ(0, close(sync_child[0]));
+
+	/* Lets a delivered-but-pending signal run our handler, if any. */
+	for (i = 0; i < 100 && !signal_received; i++)
+		usleep(1000);
+
+	/*
+	 * SCOPE_SIGNAL must block the fan-out to this non-sandboxed parent,
+	 * which is outside the child's Landlock domain.  Before the fix the
+	 * parent was signaled here.
+	 */
+	EXPECT_EQ(0, signal_received);
+
+	ASSERT_EQ(child, waitpid(child, &status, 0));
+	if (WIFSIGNALED(status) || !WIFEXITED(status) ||
+	    WEXITSTATUS(status) != EXIT_SUCCESS)
+		_metadata->exit_code = KSFT_FAIL;
+}
+
+static void *thread_setown_scoped(void *arg)
+{
+	const int fd = *(int *)arg;
+	int ruleset_fd;
+	const struct landlock_ruleset_attr ruleset_attr = {
+		.scoped = LANDLOCK_SCOPE_SIGNAL,
+	};
+
+	/* Sandboxes only this non-leader thread (no thread syncing). */
+	ruleset_fd =
+		landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0);
+	if (ruleset_fd < 0)
+		return THREAD_ERROR;
+	if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) ||
+	    landlock_restrict_self(ruleset_fd, 0)) {
+		close(ruleset_fd);
+		return THREAD_ERROR;
+	}
+	close(ruleset_fd);
+
+	/* Makes this process group own the SIGIO source. */
+	if (fcntl(fd, F_SETSIG, SIGURG) || fcntl(fd, F_SETOWN, -getpgrp()) ||
+	    fcntl(fd, F_SETFL, O_ASYNC))
+		return THREAD_ERROR;
+
+	return THREAD_SUCCESS;
+}
+
+/*
+ * Checks that the SIGIO fan-out is still delivered to the file owner's own
+ * process when fcntl(F_SETOWN, -pgrp) was issued from a sandboxed non-leader
+ * thread.
+ *
+ * The Landlock domain is recorded for a process-group owner (so out-of-domain
+ * members stay blocked, see sigio_to_pgid_members), but the kernel signals a
+ * process group through its members' thread-group leaders.  Here the leader is
+ * not sandboxed and thus has a different domain than the registering thread, so
+ * the registration-time check cannot tell that it belongs to the owner's own
+ * process.  hook_file_send_sigiotask() must recognize it through the recorded
+ * thread group and allow the delivery, matching the same-process guarantee of
+ * commit 18eb75f3af40.  Without that exemption the leader is wrongly denied and
+ * never signaled.
+ */
+TEST(sigio_to_pgid_self)
+{
+	int trigger[2];
+	pthread_t thread;
+	void *ret = THREAD_INVALID;
+	int i;
+
+	drop_caps(_metadata);
+
+	/* Bounds the SIGIO fan-out to this process. */
+	ASSERT_EQ(0, setpgid(0, 0));
+
+	/* The non-sandboxed thread-group leader is the SIGIO target. */
+	ASSERT_EQ(0, setup_signal_handler(SIGURG));
+	signal_received = 0;
+
+	ASSERT_EQ(0, pipe2(trigger, O_CLOEXEC));
+
+	/*
+	 * Registers the process-group fowner from a sibling thread that
+	 * sandboxes only itself, so its domain differs from the leader's.
+	 */
+	ASSERT_EQ(0, pthread_create(&thread, NULL, thread_setown_scoped,
+				    &trigger[0]));
+	ASSERT_EQ(0, pthread_join(thread, &ret));
+	ASSERT_EQ(THREAD_SUCCESS, ret);
+
+	/* Fans SIGURG out to the process group. */
+	ASSERT_EQ(1, write(trigger[1], ".", 1));
+
+	for (i = 0; i < 1000 && !signal_received; i++)
+		usleep(1000);
+
+	/*
+	 * Same-process delivery must always be allowed, even though the owner
+	 * was registered from a sandboxed sibling thread.
+	 */
+	EXPECT_EQ(1, signal_received);
+
+	EXPECT_EQ(0, close(trigger[0]));
+	EXPECT_EQ(0, close(trigger[1]));
+}
+
 TEST_HARNESS_MAIN
diff --git a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh
index 44f4e703deb9..a1cfd3a349db 100755
--- a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh
+++ b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh
@@ -17,6 +17,7 @@ if ! command -v killall >/dev/null 2>&1; then
 fi
 
 nr_hugepgs=$(cat /proc/sys/vm/nr_hugepages)
+trap 'echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages' EXIT INT TERM
 
 fault_limit_file=limit_in_bytes
 reservation_limit_file=rsvd.limit_in_bytes
@@ -70,7 +71,6 @@ function cleanup() {
   if [[ -e $cgroup_path/hugetlb_cgroup_test2 ]]; then
     rmdir $cgroup_path/hugetlb_cgroup_test2
   fi
-  echo 0 >/proc/sys/vm/nr_hugepages
   echo CLEANUP DONE
 }
 
@@ -94,6 +94,15 @@ function get_machine_hugepage_size() {
 }
 
 MB=$(get_machine_hugepage_size)
+if (( MB >= 1024 )); then
+        # For 1GB hugepages
+        UNIT="GB"
+        MB_DISPLAY=$((MB / 1024))
+else
+        # For 2MB hugepages
+        UNIT="MB"
+        MB_DISPLAY=$MB
+fi
 
 function setup_cgroup() {
   local name="$1"
@@ -103,11 +112,12 @@ function setup_cgroup() {
   mkdir $cgroup_path/$name
 
   echo writing cgroup limit: "$cgroup_limit"
-  echo "$cgroup_limit" >$cgroup_path/$name/hugetlb.${MB}MB.$fault_limit_file
+  echo "$cgroup_limit" > \
+	  $cgroup_path/$name/hugetlb.${MB_DISPLAY}${UNIT}.$fault_limit_file
 
   echo writing reservation limit: "$reservation_limit"
   echo "$reservation_limit" > \
-    $cgroup_path/$name/hugetlb.${MB}MB.$reservation_limit_file
+    $cgroup_path/$name/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_limit_file
 
   if [ -e "$cgroup_path/$name/cpuset.cpus" ]; then
     echo 0 >$cgroup_path/$name/cpuset.cpus
@@ -142,7 +152,7 @@ function wait_for_file_value() {
 
 function wait_for_hugetlb_memory_to_get_depleted() {
   local cgroup="$1"
-  local path="$cgroup_path/$cgroup/hugetlb.${MB}MB.$reservation_usage_file"
+  local path="$cgroup_path/$cgroup/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_usage_file"
 
   wait_for_file_value "$path" "0"
 }
@@ -150,7 +160,7 @@ function wait_for_hugetlb_memory_to_get_depleted() {
 function wait_for_hugetlb_memory_to_get_reserved() {
   local cgroup="$1"
   local size="$2"
-  local path="$cgroup_path/$cgroup/hugetlb.${MB}MB.$reservation_usage_file"
+  local path="$cgroup_path/$cgroup/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_usage_file"
 
   wait_for_file_value "$path" "$size"
 }
@@ -158,7 +168,7 @@ function wait_for_hugetlb_memory_to_get_reserved() {
 function wait_for_hugetlb_memory_to_get_written() {
   local cgroup="$1"
   local size="$2"
-  local path="$cgroup_path/$cgroup/hugetlb.${MB}MB.$fault_usage_file"
+  local path="$cgroup_path/$cgroup/hugetlb.${MB_DISPLAY}${UNIT}.$fault_usage_file"
 
   wait_for_file_value "$path" "$size"
 }
@@ -180,8 +190,8 @@ function write_hugetlbfs_and_get_usage() {
   hugetlb_difference=0
   reserved_difference=0
 
-  local hugetlb_usage=$cgroup_path/$cgroup/hugetlb.${MB}MB.$fault_usage_file
-  local reserved_usage=$cgroup_path/$cgroup/hugetlb.${MB}MB.$reservation_usage_file
+  local hugetlb_usage=$cgroup_path/$cgroup/hugetlb.${MB_DISPLAY}${UNIT}.$fault_usage_file
+  local reserved_usage=$cgroup_path/$cgroup/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_usage_file
 
   local hugetlb_before=$(cat $hugetlb_usage)
   local reserved_before=$(cat $reserved_usage)
@@ -312,8 +322,10 @@ function run_test() {
 
   cleanup_hugetlb_memory "hugetlb_cgroup_test"
 
-  local final_hugetlb=$(cat $cgroup_path/hugetlb_cgroup_test/hugetlb.${MB}MB.$fault_usage_file)
-  local final_reservation=$(cat $cgroup_path/hugetlb_cgroup_test/hugetlb.${MB}MB.$reservation_usage_file)
+  local final_hugetlb=$(cat \
+	 $cgroup_path/hugetlb_cgroup_test/hugetlb.${MB_DISPLAY}${UNIT}.$fault_usage_file)
+  local final_reservation=$(cat \
+	  $cgroup_path/hugetlb_cgroup_test/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_usage_file)
 
   echo $hugetlb_difference
   echo $reserved_difference
@@ -369,10 +381,14 @@ function run_multiple_cgroup_test() {
   reservation_failed1=$reservation_failed
   oom_killed1=$oom_killed
 
-  local cgroup1_hugetlb_usage=$cgroup_path/hugetlb_cgroup_test1/hugetlb.${MB}MB.$fault_usage_file
-  local cgroup1_reservation_usage=$cgroup_path/hugetlb_cgroup_test1/hugetlb.${MB}MB.$reservation_usage_file
-  local cgroup2_hugetlb_usage=$cgroup_path/hugetlb_cgroup_test2/hugetlb.${MB}MB.$fault_usage_file
-  local cgroup2_reservation_usage=$cgroup_path/hugetlb_cgroup_test2/hugetlb.${MB}MB.$reservation_usage_file
+  local cgroup1_hugetlb_usage=\
+	  $cgroup_path/hugetlb_cgroup_test1/hugetlb.${MB_DISPLAY}${UNIT}.$fault_usage_file
+  local cgroup1_reservation_usage=\
+	  $cgroup_path/hugetlb_cgroup_test1/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_usage_file
+  local cgroup2_hugetlb_usage=\
+	  $cgroup_path/hugetlb_cgroup_test2/hugetlb.${MB_DISPLAY}${UNIT}.$fault_usage_file
+  local cgroup2_reservation_usage=\
+	  $cgroup_path/hugetlb_cgroup_test2/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_usage_file
 
   local usage_before_second_write=$(cat $cgroup1_hugetlb_usage)
   local reservation_usage_before_second_write=$(cat $cgroup1_reservation_usage)
@@ -599,4 +615,3 @@ if [[ $do_umount ]]; then
   rmdir $cgroup_path
 fi
 
-echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages
diff --git a/tools/testing/selftests/mm/compaction_test.c b/tools/testing/selftests/mm/compaction_test.c
index 30209c40b697..e1610e2fbdf6 100644
--- a/tools/testing/selftests/mm/compaction_test.c
+++ b/tools/testing/selftests/mm/compaction_test.c
@@ -261,6 +261,9 @@ int main(int argc, char **argv)
 		mem_fragmentable_MB -= MAP_SIZE_MB;
 	}
 
+	/* Unmap every other entry in the list to create fragmentation with
+	 * locked pages before invoking check_compaction().
+	 */
 	for (entry = list; entry != NULL; entry = entry->next) {
 		munmap(entry->map, MAP_SIZE);
 		if (!entry->next)
diff --git a/tools/testing/selftests/mm/hmm-tests.c b/tools/testing/selftests/mm/hmm-tests.c
index 77fb4c5d871b..f16da3267d48 100644
--- a/tools/testing/selftests/mm/hmm-tests.c
+++ b/tools/testing/selftests/mm/hmm-tests.c
@@ -21,6 +21,7 @@
 #include <strings.h>
 #include <time.h>
 #include <pthread.h>
+#include <limits.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/mman.h>
@@ -1599,8 +1600,8 @@ TEST_F(hmm2, snapshot)
 }
 
 /*
- * Test the hmm_range_fault() HMM_PFN_PMD flag for large pages that
- * should be mapped by a large page table entry.
+ * Test the hmm_range_fault() handling of large pages (PMD or PUD)
+ * that should be mapped by a large page table entry.
  */
 TEST_F(hmm, compound)
 {
@@ -1610,6 +1611,7 @@ TEST_F(hmm, compound)
 	unsigned long default_hsize = default_huge_page_size();
 	int *ptr;
 	unsigned char *m;
+	unsigned char prot;
 	int ret;
 	unsigned long i;
 
@@ -1646,11 +1648,20 @@ TEST_F(hmm, compound)
 	ASSERT_EQ(ret, 0);
 	ASSERT_EQ(buffer->cpages, npages);
 
-	/* Check what the device saw. */
+	/*
+	 * Check what the device saw.  The region is backed by a single huge
+	 * page that the device reports either at PMD or at PUD level depending
+	 * on the configured default hugepage size.  Determine that level from
+	 * the first page and require every page in the range to match it
+	 * exactly, so that a fragmented mapping mixing levels (or a missing
+	 * large-page bit) is still caught and reported with its actual value.
+	 */
 	m = buffer->mirror;
+	prot = HMM_DMIRROR_PROT_WRITE |
+	       ((m[0] & HMM_DMIRROR_PROT_PUD) ? HMM_DMIRROR_PROT_PUD :
+						HMM_DMIRROR_PROT_PMD);
 	for (i = 0; i < npages; ++i)
-		ASSERT_EQ(m[i], HMM_DMIRROR_PROT_WRITE |
-				HMM_DMIRROR_PROT_PMD);
+		ASSERT_EQ(m[i], prot);
 
 	/* Make the region read-only. */
 	ret = mprotect(buffer->ptr, size, PROT_READ);
@@ -1661,11 +1672,17 @@ TEST_F(hmm, compound)
 	ASSERT_EQ(ret, 0);
 	ASSERT_EQ(buffer->cpages, npages);
 
-	/* Check what the device saw. */
+	/*
+	 * Check what the device saw after mprotect(PROT_READ).  Same
+	 * approach as above: determine the mapping level from the first
+	 * page and require every page to match it exactly.
+	 */
 	m = buffer->mirror;
+	prot = HMM_DMIRROR_PROT_READ |
+	       ((m[0] & HMM_DMIRROR_PROT_PUD) ? HMM_DMIRROR_PROT_PUD :
+						HMM_DMIRROR_PROT_PMD);
 	for (i = 0; i < npages; ++i)
-		ASSERT_EQ(m[i], HMM_DMIRROR_PROT_READ |
-				HMM_DMIRROR_PROT_PMD);
+		ASSERT_EQ(m[i], prot);
 
 	munmap(buffer->ptr, buffer->size);
 	buffer->ptr = NULL;
@@ -1865,6 +1882,8 @@ TEST_F(hmm, exclusive_cow)
 	unsigned long i;
 	int *ptr;
 	int ret;
+	pid_t pid;
+	int status;
 
 	npages = ALIGN(HMM_BUFFER_SIZE, self->page_size) >> self->page_shift;
 	ASSERT_NE(npages, 0);
@@ -1893,14 +1912,37 @@ TEST_F(hmm, exclusive_cow)
 	ASSERT_EQ(ret, 0);
 	ASSERT_EQ(buffer->cpages, npages);
 
-	fork();
+	pid = fork();
+	if (pid == -1)
+		ASSERT_EQ(pid, 0);
 
-	/* Fault pages back to system memory and check them. */
+	if (pid == 0) {
+		/*
+		 * Child verifies COW independently, then _exit(0)s so it does
+		 * not run the test teardown.  A failed ASSERT_* here makes the
+		 * harness abort() the child, so the parent sees
+		 * !WIFEXITED(status) below and fails in turn.
+		 */
+		for (i = 0, ptr = buffer->ptr; i < size / sizeof(*ptr); ++i)
+			ASSERT_EQ(ptr[i]++, i);
+
+		for (i = 0, ptr = buffer->ptr; i < size / sizeof(*ptr); ++i)
+			ASSERT_EQ(ptr[i], i + 1);
+
+		_exit(0);
+	}
+
+	/* Parent: also increment to verify COW works for both processes. */
 	for (i = 0, ptr = buffer->ptr; i < size / sizeof(*ptr); ++i)
 		ASSERT_EQ(ptr[i]++, i);
 
 	for (i = 0, ptr = buffer->ptr; i < size / sizeof(*ptr); ++i)
-		ASSERT_EQ(ptr[i], i+1);
+		ASSERT_EQ(ptr[i], i + 1);
+
+	/* Parent: wait for child and then free the buffer. */
+	ASSERT_EQ(waitpid(pid, &status, 0), pid);
+	ASSERT_TRUE(WIFEXITED(status));
+	ASSERT_EQ(WEXITSTATUS(status), 0);
 
 	hmm_buffer_free(buffer);
 }
@@ -2332,12 +2374,21 @@ TEST_F(hmm, migrate_partial_unmap_fault)
 	struct hmm_buffer *buffer;
 	unsigned long npages;
 	unsigned long size = read_pmd_pagesize();
+	unsigned long unmap_size;
+	unsigned long offsets[3];
 	unsigned long i;
 	void *old_ptr;
 	void *map;
 	int *ptr;
 	int ret, j, use_thp;
-	int offsets[] = { 0, 512 * ONEKB, ONEMEG };
+
+	if (!size)
+		size = TWOMEG;
+
+	unmap_size = size / 2;
+	offsets[0] = 0;
+	offsets[1] = size / 4;
+	offsets[2] = size / 2;
 
 	for (use_thp = 0; use_thp < 2; ++use_thp) {
 		for (j = 0; j < ARRAY_SIZE(offsets); ++j) {
@@ -2379,12 +2430,12 @@ TEST_F(hmm, migrate_partial_unmap_fault)
 			for (i = 0, ptr = buffer->mirror; i < size / sizeof(*ptr); ++i)
 				ASSERT_EQ(ptr[i], i);
 
-			munmap(buffer->ptr + offsets[j], ONEMEG);
+			munmap(buffer->ptr + offsets[j], unmap_size);
 
 			/* Fault pages back to system memory and check them. */
 			for (i = 0, ptr = buffer->ptr; i < size / sizeof(*ptr); ++i)
 				if (i * sizeof(int) < offsets[j] ||
-				    i * sizeof(int) >= offsets[j] + ONEMEG)
+				    i * sizeof(int) >= offsets[j] + unmap_size)
 					ASSERT_EQ(ptr[i], i);
 
 			buffer->ptr = old_ptr;
@@ -2398,12 +2449,19 @@ TEST_F(hmm, migrate_remap_fault)
 	struct hmm_buffer *buffer;
 	unsigned long npages;
 	unsigned long size = read_pmd_pagesize();
+	unsigned long offsets[3];
 	unsigned long i;
 	void *old_ptr, *new_ptr = NULL;
 	void *map;
 	int *ptr;
 	int ret, j, use_thp, dont_unmap, before;
-	int offsets[] = { 0, 512 * ONEKB, ONEMEG };
+
+	if (!size)
+		size = TWOMEG;
+
+	offsets[0] = 0;
+	offsets[1] = size / 4;
+	offsets[2] = size / 2;
 
 	for (before = 0; before < 2; ++before) {
 		for (dont_unmap = 0; dont_unmap < 2; ++dont_unmap) {
@@ -2806,38 +2864,45 @@ static inline int run_migration_benchmark(int fd, int use_thp, size_t buffer_siz
 TEST_F_TIMEOUT(hmm, benchmark_thp_migration, 120)
 {
 	struct benchmark_results thp_results, regular_results;
-	size_t thp_size = 2 * 1024 * 1024; /* 2MB - typical THP size */
+	size_t thp_size = read_pmd_pagesize();
 	int iterations = 5;
 
+	if (!thp_size)
+		thp_size = TWOMEG;
+
 	printf("\nHMM THP Migration Benchmark\n");
 	printf("---------------------------\n");
 	printf("System page size: %ld bytes\n", sysconf(_SC_PAGESIZE));
 
 	/* Test different buffer sizes */
 	size_t test_sizes[] = {
-		thp_size / 4,      /* 512KB - smaller than THP */
-		thp_size / 2,      /* 1MB - half THP */
-		thp_size,          /* 2MB - single THP */
-		thp_size * 2,      /* 4MB - two THPs */
-		thp_size * 4,      /* 8MB - four THPs */
-		thp_size * 8,       /* 16MB - eight THPs */
-		thp_size * 128,       /* 256MB - one twenty eight THPs */
+		thp_size / 4,      /* quarter THP */
+		thp_size / 2,      /* half THP */
+		thp_size,          /* single THP */
+		thp_size * 2,      /* two THPs */
+		thp_size * 4,      /* four THPs */
+		thp_size * 8,      /* eight THPs */
+		thp_size * 128,    /* one twenty eight THPs */
 	};
 
 	static const char *const test_names[] = {
-		"Small Buffer (512KB)",
-		"Half THP Size (1MB)",
-		"Single THP Size (2MB)",
-		"Two THP Size (4MB)",
-		"Four THP Size (8MB)",
-		"Eight THP Size (16MB)",
-		"One twenty eight THP Size (256MB)"
+		"Small Buffer",
+		"Half THP Size",
+		"Single THP Size",
+		"Two THP Size",
+		"Four THP Size",
+		"Eight THP Size",
+		"One twenty eight THP Size"
 	};
 
 	int num_tests = ARRAY_SIZE(test_sizes);
 
 	/* Run all tests */
 	for (int i = 0; i < num_tests; i++) {
+		/* Skip test sizes exceeding INT_MAX to avoid overflow */
+		if (test_sizes[i] > INT_MAX)
+			break;
+
 		/* Test with THP */
 		ASSERT_EQ(run_migration_benchmark(self->fd, 1, test_sizes[i],
 					iterations, &thp_results), 0);
diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c
index b8f7d92e5a35..d8be8329868f 100644
--- a/tools/testing/selftests/mm/hugepage-mremap.c
+++ b/tools/testing/selftests/mm/hugepage-mremap.c
@@ -31,7 +31,7 @@
 #define MB_TO_BYTES(x) (x * 1024 * 1024)
 
 #define PROTECTION (PROT_READ | PROT_WRITE | PROT_EXEC)
-#define FLAGS (MAP_SHARED | MAP_ANONYMOUS)
+#define FLAGS (MAP_HUGETLB | MAP_SHARED)
 
 static void check_bytes(char *addr)
 {
@@ -85,25 +85,14 @@ static void register_region_with_uffd(char *addr, size_t len)
 	if (ioctl(uffd, UFFDIO_API, &uffdio_api) == -1)
 		ksft_exit_fail_msg("ioctl-UFFDIO_API: %s\n", strerror(errno));
 
-	/* Create a private anonymous mapping. The memory will be
-	 * demand-zero paged--that is, not yet allocated. When we
-	 * actually touch the memory, it will be allocated via
-	 * the userfaultfd.
-	 */
-
-	addr = mmap(NULL, len, PROT_READ | PROT_WRITE,
-		    MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-	if (addr == MAP_FAILED)
-		ksft_exit_fail_msg("mmap: %s\n", strerror(errno));
-
-	ksft_print_msg("Address returned by mmap() = %p\n", addr);
-
-	/* Register the memory range of the mapping we just created for
-	 * handling by the userfaultfd object. In mode, we request to track
-	 * missing pages (i.e., pages that have not yet been faulted in).
+	/* Register the passed memory range for handling by the userfaultfd object.
+	 * In mode, we request to track missing pages
+	 * (i.e., pages that have not yet been faulted in).
 	 */
 	if (uffd_register(uffd, addr, len, true, false, false))
 		ksft_exit_fail_msg("ioctl-UFFDIO_REGISTER: %s\n", strerror(errno));
+
+	ksft_print_msg("Registered memory at address %p with userfaultfd\n", addr);
 }
 
 int main(int argc, char *argv[])
@@ -132,23 +121,20 @@ int main(int argc, char *argv[])
 
 	/* mmap to a PUD aligned address to hopefully trigger pmd sharing. */
 	unsigned long suggested_addr = 0x7eaa40000000;
-	void *haddr = mmap((void *)suggested_addr, length, PROTECTION,
-			   MAP_HUGETLB | MAP_SHARED | MAP_POPULATE, fd, 0);
+	void *haddr = mmap((void *)suggested_addr, length, PROTECTION, FLAGS, fd, 0);
 	ksft_print_msg("Map haddr: Returned address is %p\n", haddr);
 	if (haddr == MAP_FAILED)
 		ksft_exit_fail_msg("mmap1: %s\n", strerror(errno));
 
 	/* mmap again to a dummy address to hopefully trigger pmd sharing. */
 	suggested_addr = 0x7daa40000000;
-	void *daddr = mmap((void *)suggested_addr, length, PROTECTION,
-			   MAP_HUGETLB | MAP_SHARED | MAP_POPULATE, fd, 0);
+	void *daddr = mmap((void *)suggested_addr, length, PROTECTION, FLAGS, fd, 0);
 	ksft_print_msg("Map daddr: Returned address is %p\n", daddr);
 	if (daddr == MAP_FAILED)
 		ksft_exit_fail_msg("mmap3: %s\n", strerror(errno));
 
 	suggested_addr = 0x7faa40000000;
-	void *vaddr =
-		mmap((void *)suggested_addr, length, PROTECTION, FLAGS, -1, 0);
+	void *vaddr = mmap((void *)suggested_addr, length, PROTECTION, FLAGS, fd, 0);
 	ksft_print_msg("Map vaddr: Returned address is %p\n", vaddr);
 	if (vaddr == MAP_FAILED)
 		ksft_exit_fail_msg("mmap2: %s\n", strerror(errno));
diff --git a/tools/testing/selftests/mm/hugetlb_reparenting_test.sh b/tools/testing/selftests/mm/hugetlb_reparenting_test.sh
index 0dd31892ff67..95f517c3bd16 100755
--- a/tools/testing/selftests/mm/hugetlb_reparenting_test.sh
+++ b/tools/testing/selftests/mm/hugetlb_reparenting_test.sh
@@ -12,6 +12,8 @@ if [[ $(id -u) -ne 0 ]]; then
 fi
 
 nr_hugepgs=$(cat /proc/sys/vm/nr_hugepages)
+trap 'echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages' EXIT INT TERM
+
 usage_file=usage_in_bytes
 
 if [[ "$1" == "-cgroup-v2" ]]; then
@@ -46,6 +48,13 @@ function get_machine_hugepage_size() {
 }
 
 MB=$(get_machine_hugepage_size)
+if (( MB >= 1024 )); then
+  UNIT="GB"
+  MB_DISPLAY=$((MB / 1024))
+else
+  UNIT="MB"
+  MB_DISPLAY=$MB
+fi
 
 function cleanup() {
   echo cleanup
@@ -56,7 +65,6 @@ function cleanup() {
   rmdir "$CGROUP_ROOT"/a/b 2>/dev/null
   rmdir "$CGROUP_ROOT"/a 2>/dev/null
   rmdir "$CGROUP_ROOT"/test1 2>/dev/null
-  echo $nr_hugepgs >/proc/sys/vm/nr_hugepages
   set -e
 }
 
@@ -87,6 +95,7 @@ function assert_with_retry() {
     if [[ $elapsed -ge $timeout ]]; then
       echo "actual = $((${actual%% *} / 1024 / 1024)) MB"
       echo "expected = $((${expected%% *} / 1024 / 1024)) MB"
+      echo FAIL
       cleanup
       exit 1
     fi
@@ -96,22 +105,19 @@ function assert_with_retry() {
 }
 
 function assert_state() {
-  local expected_a="$1"
-  local expected_a_hugetlb="$2"
-  local expected_b=""
+  local expected_a_hugetlb="$1"
   local expected_b_hugetlb=""
 
-  if [ ! -z ${3:-} ] && [ ! -z ${4:-} ]; then
-    expected_b="$3"
-    expected_b_hugetlb="$4"
+  if [ ! -z ${2:-} ]; then
+    expected_b_hugetlb="$2"
   fi
 
-  assert_with_retry "$CGROUP_ROOT/a/memory.$usage_file" "$expected_a"
-  assert_with_retry "$CGROUP_ROOT/a/hugetlb.${MB}MB.$usage_file" "$expected_a_hugetlb"
+  assert_with_retry \
+	  "$CGROUP_ROOT/a/hugetlb.${MB_DISPLAY}${UNIT}.$usage_file" "$expected_a_hugetlb"
 
-  if [[ -n "$expected_b" && -n "$expected_b_hugetlb" ]]; then
-    assert_with_retry "$CGROUP_ROOT/a/b/memory.$usage_file" "$expected_b"
-    assert_with_retry "$CGROUP_ROOT/a/b/hugetlb.${MB}MB.$usage_file" "$expected_b_hugetlb"
+  if [[ -n "$expected_b_hugetlb" ]]; then
+    assert_with_retry \
+	  "$CGROUP_ROOT/a/b/hugetlb.${MB_DISPLAY}${UNIT}.$usage_file" "$expected_b_hugetlb"
   fi
 }
 
@@ -143,18 +149,17 @@ write_hugetlbfs() {
   local size="$3"
 
   if [[ $cgroup2 ]]; then
-    echo $$ >$CGROUP_ROOT/$cgroup/cgroup.procs
+    cg_file="$CGROUP_ROOT/$cgroup/cgroup.procs"
   else
     echo 0 >$CGROUP_ROOT/$cgroup/cpuset.mems
     echo 0 >$CGROUP_ROOT/$cgroup/cpuset.cpus
-    echo $$ >"$CGROUP_ROOT/$cgroup/tasks"
-  fi
-  ./write_to_hugetlbfs -p "$path" -s "$size" -m 0 -o
-  if [[ $cgroup2 ]]; then
-    echo $$ >$CGROUP_ROOT/cgroup.procs
-  else
-    echo $$ >"$CGROUP_ROOT/tasks"
+    cg_file="$CGROUP_ROOT/$cgroup/tasks"
   fi
+
+  # Spawn helper to join cgroup before exec to ensure correct cgroup accounting
+  bash -c 'echo $$ > "$1"; exec ./write_to_hugetlbfs -p "$2" -s "$3" -m 0 -o' _ \
+	  "$cg_file" "$path" "$size" & pid=$!
+  wait "$pid"
   echo
 }
 
@@ -192,21 +197,21 @@ if [[ ! $cgroup2 ]]; then
   write_hugetlbfs a "$MNT"/test $size
 
   echo Assert memory charged correctly for parent use.
-  assert_state 0 $size 0 0
+  assert_state $size 0
 
   write_hugetlbfs a/b "$MNT"/test2 $size
 
   echo Assert memory charged correctly for child use.
-  assert_state 0 $(($size * 2)) 0 $size
+  assert_state $(($size * 2)) $size
 
   rmdir "$CGROUP_ROOT"/a/b
   echo Assert memory reparent correctly.
-  assert_state 0 $(($size * 2))
+  assert_state $(($size * 2))
 
   rm -rf "$MNT"/*
   umount "$MNT"
   echo Assert memory uncharged correctly.
-  assert_state 0 0
+  assert_state 0
 
   cleanup
 fi
@@ -220,16 +225,16 @@ echo write
 write_hugetlbfs a/b "$MNT"/test2 $size
 
 echo Assert memory charged correctly for child only use.
-assert_state 0 $(($size)) 0 $size
+assert_state $(($size)) $size
 
 rmdir "$CGROUP_ROOT"/a/b
 echo Assert memory reparent correctly.
-assert_state 0 $size
+assert_state $size
 
 rm -rf "$MNT"/*
 umount "$MNT"
 echo Assert memory uncharged correctly.
-assert_state 0 0
+assert_state 0
 
 cleanup
 
@@ -240,4 +245,3 @@ if [[ $do_umount ]]; then
   rm -rf $CGROUP_ROOT
 fi
 
-echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages
diff --git a/tools/testing/selftests/mm/pkey-arm64.h b/tools/testing/selftests/mm/pkey-arm64.h
index 8e9685e03c44..c5a78a2f211d 100644
--- a/tools/testing/selftests/mm/pkey-arm64.h
+++ b/tools/testing/selftests/mm/pkey-arm64.h
@@ -130,9 +130,10 @@ static inline u64 get_pkey_bits(u64 reg, int pkey)
 static inline void aarch64_write_signal_pkey(ucontext_t *uctxt, u64 pkey)
 {
 	struct _aarch64_ctx *ctx = GET_UC_RESV_HEAD(uctxt);
+	size_t resv_size = GET_UCP_RESV_SIZE(uctxt);
 	struct poe_context *poe_ctx =
 		(struct poe_context *) get_header(ctx, POE_MAGIC,
-						sizeof(uctxt->uc_mcontext), NULL);
+						  resv_size, NULL);
 	if (poe_ctx)
 		poe_ctx->por_el0 = pkey;
 }
diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh
index c17b133a81d2..59e6eada431f 100755
--- a/tools/testing/selftests/mm/run_vmtests.sh
+++ b/tools/testing/selftests/mm/run_vmtests.sh
@@ -235,32 +235,61 @@ pretty_name() {
 run_test() {
 	if test_selected ${CATEGORY}; then
 		local skip=0
+		local LOADED_HWPOISON_INJECT_MOD=0
 
 		# On memory constrainted systems some tests can fail to allocate hugepages.
 		# perform some cleanup before the test for a higher success rate.
 		if [ ${CATEGORY} == "thp" -o ${CATEGORY} == "hugetlb" ]; then
-			if [ "${HAVE_HUGEPAGES}" = "1" ]; then
+			mem_kb=$(awk '/MemAvailable/ {print $2}' /proc/meminfo)
+			mem_Mb=$((mem_kb / 1024))
+
+			if (( $mem_Mb < 256 )); then
 				echo 3 > /proc/sys/vm/drop_caches
 				sleep 2
 				echo 1 > /proc/sys/vm/compact_memory
 				sleep 2
-			else
-				echo "hugepages not supported" | tap_prefix
-				skip=1
 			fi
 		fi
 
+		# Ensure hwpoison_inject is available for memory-failure tests
+		if [ "${CATEGORY}" = "memory-failure" ]; then
+			# Try to load hwpoison_inject if not present.
+			HWPOISON_DIR=/sys/kernel/debug/hwpoison/
+			if [ ! -d "$HWPOISON_DIR" ]; then
+				if ! modprobe -n hwpoison_inject > /dev/null 2>&1; then
+					echo "Module hwpoison_inject not found, skipping..." \
+						| tap_prefix
+					skip=1
+				else
+					modprobe hwpoison_inject > /dev/null 2>&1
+					LOADED_HWPOISON_INJECT_MOD=1
+					if [ ! -d "$HWPOISON_DIR" ]; then
+						echo "hwpoison debugfs interface not present" \
+							| tap_prefix
+						skip=1
+					fi
+				fi
+			fi
+
+		fi
+
 		local test=$(pretty_name "$*")
 		local title="running $*"
 		local sep=$(echo -n "$title" | tr "[:graph:][:space:]" -)
 		printf "%s\n%s\n%s\n" "$sep" "$title" "$sep" | tap_prefix
 
-		if [ "${skip}" != "1" ]; then
+		if [ $skip -eq 1 ]; then
+			local ret=$ksft_skip
+		else
 			("$@" 2>&1) | tap_prefix
 			local ret=${PIPESTATUS[0]}
-		else
-			local ret=$ksft_skip
 		fi
+
+		# Unload hwpoison_inject if we loaded it
+		if [ "${LOADED_HWPOISON_INJECT_MOD}" = "1" ]; then
+			modprobe -r hwpoison_inject > /dev/null 2>&1
+		fi
+
 		count_total=$(( count_total + 1 ))
 		if [ $ret -eq 0 ]; then
 			count_pass=$(( count_pass + 1 ))
@@ -270,7 +299,9 @@ run_test() {
 			count_skip=$(( count_skip + 1 ))
 			echo "[SKIP]" | tap_prefix
 			echo "ok ${count_total} ${test} # SKIP" | tap_output
-			exitcode=$ksft_skip
+			if [ $exitcode -eq 0 ]; then
+				exitcode=$ksft_skip
+			fi
 		else
 			count_fail=$(( count_fail + 1 ))
 			echo "[FAIL]" | tap_prefix
@@ -531,24 +562,7 @@ CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned
 
 CATEGORY="rmap" run_test ./rmap
 
-# Try to load hwpoison_inject if not present.
-HWPOISON_DIR=/sys/kernel/debug/hwpoison/
-if [ ! -d "$HWPOISON_DIR" ]; then
-	if ! modprobe -q -R hwpoison_inject; then
-		echo "Module hwpoison_inject not found, skipping..."
-	else
-		modprobe hwpoison_inject > /dev/null 2>&1
-		LOADED_MOD=1
-	fi
-fi
-
-if [ -d "$HWPOISON_DIR" ]; then
-	CATEGORY="memory-failure" run_test ./memory-failure
-fi
-
-if [ -n "${LOADED_MOD}" ]; then
-	modprobe -r hwpoison_inject > /dev/null 2>&1
-fi
+CATEGORY="memory-failure" run_test ./memory-failure
 
 if [ "${HAVE_HUGEPAGES}" = 1 ]; then
 	echo "$orig_nr_hugepgs" > /proc/sys/vm/nr_hugepages
diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
index 500d07c4938b..ee256afecd8f 100644
--- a/tools/testing/selftests/mm/split_huge_page_test.c
+++ b/tools/testing/selftests/mm/split_huge_page_test.c
@@ -470,13 +470,18 @@ static void split_file_backed_thp(int order)
 	char tmpfs_template[] = "/tmp/thp_split_XXXXXX";
 	const char *tmpfs_loc = mkdtemp(tmpfs_template);
 	char testfile[INPUT_MAX];
+	unsigned long size = 2 * pmd_pagesize;
+	char opts[64];
 	ssize_t num_written, num_read;
-	char *file_buf1, *file_buf2;
+	char *file_buf1 = NULL, *file_buf2 = NULL;
 	uint64_t pgoff_start = 0, pgoff_end = 1024;
 	int i;
 
 	ksft_print_msg("Please enable pr_debug in split_huge_pages_in_file() for more info.\n");
 
+	if (!tmpfs_loc)
+		ksft_exit_fail_msg("mkdtemp failed\n");
+
 	file_buf1 = (char *)malloc(pmd_pagesize);
 	file_buf2 = (char *)malloc(pmd_pagesize);
 
@@ -489,10 +494,13 @@ static void split_file_backed_thp(int order)
 		file_buf1[i] = (char)i;
 	memset(file_buf2, 0, pmd_pagesize);
 
-	status = mount("tmpfs", tmpfs_loc, "tmpfs", 0, "huge=always,size=4m");
+	snprintf(opts, sizeof(opts), "huge=always,size=%lu", size);
+	status = mount("tmpfs", tmpfs_loc, "tmpfs", 0, opts);
 
-	if (status)
-		ksft_exit_fail_msg("Unable to create a tmpfs for testing\n");
+	if (status) {
+		ksft_print_msg("Unable to create a tmpfs for testing\n");
+		goto out;
+	}
 
 	status = snprintf(testfile, INPUT_MAX, "%s/thp_file", tmpfs_loc);
 	if (status >= INPUT_MAX) {
@@ -544,10 +552,13 @@ static void split_file_backed_thp(int order)
 
 	status = umount(tmpfs_loc);
 	if (status) {
-		rmdir(tmpfs_loc);
-		ksft_exit_fail_msg("Unable to umount %s\n", tmpfs_loc);
+		ksft_print_msg("Unable to umount %s\n", tmpfs_loc);
+		goto out;
 	}
 
+	free(file_buf1);
+	free(file_buf2);
+
 	status = rmdir(tmpfs_loc);
 	if (status)
 		ksft_exit_fail_msg("cannot remove tmp dir: %s\n", strerror(errno));
@@ -560,8 +571,10 @@ close_file:
 	close(fd);
 cleanup:
 	umount(tmpfs_loc);
-	rmdir(tmpfs_loc);
 out:
+	free(file_buf1);
+	free(file_buf2);
+	rmdir(tmpfs_loc);
 	ksft_exit_fail_msg("Error occurred\n");
 }
 
diff --git a/tools/testing/selftests/mm/uffd-stress.c b/tools/testing/selftests/mm/uffd-stress.c
index 700fbaa18d44..dabaade1eaa0 100644
--- a/tools/testing/selftests/mm/uffd-stress.c
+++ b/tools/testing/selftests/mm/uffd-stress.c
@@ -491,9 +491,8 @@ int main(int argc, char **argv)
 
 	gopts->nr_pages_per_cpu = bytes / gopts->page_size / gopts->nr_parallel;
 	if (!gopts->nr_pages_per_cpu) {
-		_err("pages_per_cpu = 0, cannot test (%lu / %lu / %lu)",
-			bytes, gopts->page_size, gopts->nr_parallel);
-		usage();
+		ksft_exit_skip("pages_per_cpu = 0, cannot test (%zu / %lu / %lu)\n",
+			       bytes, gopts->page_size, gopts->nr_parallel);
 	}
 
 	bounces = atoi(argv[3]);
diff --git a/tools/testing/selftests/net/broadcast_ether_dst.sh b/tools/testing/selftests/net/broadcast_ether_dst.sh
index 334a7eca8a80..cc571f607429 100755
--- a/tools/testing/selftests/net/broadcast_ether_dst.sh
+++ b/tools/testing/selftests/net/broadcast_ether_dst.sh
@@ -44,7 +44,7 @@ test_broadcast_ether_dst() {
 	# tcpdump will exit after receiving a single packet
 	# timeout will kill tcpdump if it is still running after 2s
 	timeout 2s ip netns exec "${CLIENT_NS}" \
-		tcpdump -i link0 -c 1 -w "${CAPFILE}" icmp &> "${OUTPUT}" &
+		tcpdump -i link0 -c 1 -w "${CAPFILE}" -Z root icmp &> "${OUTPUT}" &
 	pid=$!
 	slowwait 1 grep -qs "listening" "${OUTPUT}"
 
diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh
index b3827b43782b..d46d2cec89e4 100644
--- a/tools/testing/selftests/net/lib.sh
+++ b/tools/testing/selftests/net/lib.sh
@@ -70,12 +70,33 @@ ksft_exit_status_merge()
 		$ksft_xfail $ksft_pass $ksft_skip $ksft_fail
 }
 
+timestamp_ms()
+{
+	local now
+	local seconds
+	local nanoseconds
+
+	now=$(date -u +%s:%N) || return
+	seconds=${now%:*}
+	nanoseconds=${now#*:}
+
+	if [[ $nanoseconds =~ ^[0-9]+$ ]]; then
+		nanoseconds=${nanoseconds:0:9}
+	else
+		nanoseconds=0
+	fi
+
+	echo $((seconds * 1000 + 10#$nanoseconds / 1000000))
+}
+
 loopy_wait()
 {
 	local sleep_cmd=$1; shift
 	local timeout_ms=$1; shift
+	local start_time
+	local current_time
 
-	local start_time="$(date -u +%s%3N)"
+	start_time=$(timestamp_ms) || return
 	while true
 	do
 		local out
@@ -84,7 +105,7 @@ loopy_wait()
 			return 0
 		fi
 
-		local current_time="$(date -u +%s%3N)"
+		current_time=$(timestamp_ms) || return
 		if ((current_time - start_time > timeout_ms)); then
 			echo -n "$out"
 			return 1
diff --git a/tools/testing/selftests/net/netfilter/nft_flowtable.sh b/tools/testing/selftests/net/netfilter/nft_flowtable.sh
index 7a34ef468975..08ad07500e8a 100755
--- a/tools/testing/selftests/net/netfilter/nft_flowtable.sh
+++ b/tools/testing/selftests/net/netfilter/nft_flowtable.sh
@@ -592,7 +592,7 @@ ip -net "$nsr1" link set tun0 up
 ip -net "$nsr1" addr add 192.168.100.1/24 dev tun0
 ip netns exec "$nsr1" sysctl net.ipv4.conf.tun0.forwarding=1 > /dev/null
 
-ip -net "$nsr1" link add name tun6 type ip6tnl local fee1:2::1 remote fee1:2::2
+ip -net "$nsr1" link add name tun6 type ip6tnl local fee1:2::1 remote fee1:2::2 encaplimit none
 ip -net "$nsr1" link set tun6 up
 ip -net "$nsr1" addr add fee1:3::1/64 dev tun6 nodad
 
@@ -601,7 +601,7 @@ ip -net "$nsr2" link set tun0 up
 ip -net "$nsr2" addr add 192.168.100.2/24 dev tun0
 ip netns exec "$nsr2" sysctl net.ipv4.conf.tun0.forwarding=1 > /dev/null
 
-ip -net "$nsr2" link add name tun6 type ip6tnl local fee1:2::2 remote fee1:2::1 || ret=1
+ip -net "$nsr2" link add name tun6 type ip6tnl local fee1:2::2 remote fee1:2::1 encaplimit none || ret=1
 ip -net "$nsr2" link set tun6 up
 ip -net "$nsr2" addr add fee1:3::2/64 dev tun6 nodad
 
@@ -651,7 +651,7 @@ ip -net "$nsr1" route change default via 192.168.200.2
 ip netns exec "$nsr1" sysctl net.ipv4.conf.tun0/10.forwarding=1 > /dev/null
 ip netns exec "$nsr1" nft -a insert rule inet filter forward 'meta oif tun0.10 accept'
 
-ip -net "$nsr1" link add name tun6.10 type ip6tnl local fee1:4::1 remote fee1:4::2
+ip -net "$nsr1" link add name tun6.10 type ip6tnl local fee1:4::1 remote fee1:4::2 encaplimit none
 ip -net "$nsr1" link set tun6.10 up
 ip -net "$nsr1" addr add fee1:5::1/64 dev tun6.10 nodad
 ip -6 -net "$nsr1" route delete default
@@ -670,7 +670,7 @@ ip -net "$nsr2" addr add 192.168.200.2/24 dev tun0.10
 ip -net "$nsr2" route change default via 192.168.200.1
 ip netns exec "$nsr2" sysctl net.ipv4.conf.tun0/10.forwarding=1 > /dev/null
 
-ip -net "$nsr2" link add name tun6.10 type ip6tnl local fee1:4::2 remote fee1:4::1 || ret=1
+ip -net "$nsr2" link add name tun6.10 type ip6tnl local fee1:4::2 remote fee1:4::1 encaplimit none || ret=1
 ip -net "$nsr2" link set tun6.10 up
 ip -net "$nsr2" addr add fee1:5::2/64 dev tun6.10 nodad
 ip -6 -net "$nsr2" route delete default
diff --git a/tools/testing/selftests/net/tcp_mmap.c b/tools/testing/selftests/net/tcp_mmap.c
index 4fcce5150850..2544ae35d07a 100644
--- a/tools/testing/selftests/net/tcp_mmap.c
+++ b/tools/testing/selftests/net/tcp_mmap.c
@@ -313,6 +313,8 @@ end:
 				tcp_info_get_rcv_mss(fd));
 	}
 error:
+	if (ctx)
+		EVP_MD_CTX_free(ctx);
 	munmap(buffer, buffer_sz);
 	close(fd);
 	if (zflg)
@@ -606,6 +608,8 @@ int main(int argc, char *argv[])
 		EVP_DigestFinal_ex(ctx, digest, &digest_len);
 		send(fd, digest, (size_t)SHA256_DIGEST_LENGTH, 0);
 	}
+	if (ctx)
+		EVP_MD_CTX_free(ctx);
 	close(fd);
 	munmap(buffer, buffer_sz);
 	return 0;
diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
index 30a236b8e9f7..d805a7dfbdd5 100644
--- a/tools/testing/selftests/net/tls.c
+++ b/tools/testing/selftests/net/tls.c
@@ -997,6 +997,8 @@ TEST_F(tls, splice_short)
 	char sendbuf[0x100];
 	char sendchar = 'S';
 	int pipefds[2];
+	int pipe_sz;
+	int ret;
 	int i;
 
 	sendchar_iov.iov_base = &sendchar;
@@ -1005,7 +1007,11 @@ TEST_F(tls, splice_short)
 	memset(sendbuf, 's', sizeof(sendbuf));
 
 	ASSERT_GE(pipe2(pipefds, O_NONBLOCK), 0);
-	ASSERT_GE(fcntl(pipefds[0], F_SETPIPE_SZ, (MAX_FRAGS + 1) * 0x1000), 0);
+	pipe_sz = (MAX_FRAGS + 1) * getpagesize();
+	ret = fcntl(pipefds[0], F_SETPIPE_SZ, pipe_sz);
+	if (ret < 0 && errno == EPERM)
+		SKIP(return, "insufficient pipe capacity");
+	ASSERT_GE(ret, pipe_sz);
 
 	for (i = 0; i < MAX_FRAGS; i++)
 		ASSERT_GE(vmsplice(pipefds[1], &sendchar_iov, 1, 0), 0);
diff --git a/tools/testing/selftests/net/vlan_bridge_binding.sh b/tools/testing/selftests/net/vlan_bridge_binding.sh
index e8c02c64e03a..d04caa14202d 100755
--- a/tools/testing/selftests/net/vlan_bridge_binding.sh
+++ b/tools/testing/selftests/net/vlan_bridge_binding.sh
@@ -64,7 +64,7 @@ check_operstate()
 	local expect=$1; shift
 	local operstate
 
-	operstate=$(busywait 1000 \
+	operstate=$(busywait 2000 \
 			operstate_is "$dev" "$expect")
 	check_err $? "Got operstate of $operstate, expected $expect"
 }
diff --git a/tools/testing/selftests/rseq/Makefile b/tools/testing/selftests/rseq/Makefile
index 50d69e22ee7a..aba6317f6cb8 100644
--- a/tools/testing/selftests/rseq/Makefile
+++ b/tools/testing/selftests/rseq/Makefile
@@ -5,9 +5,13 @@ CLANG_FLAGS += -no-integrated-as
 endif
 
 top_srcdir = ../../../..
+include $(top_srcdir)/scripts/subarch.include
+ARCH ?= $(SUBARCH)
+LINUX_TOOL_ARCH_INCLUDE = $(top_srcdir)/tools/arch/$(ARCH)/include
 
 CFLAGS += -O2 -Wall -g -I./ $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./ \
-	  $(CLANG_FLAGS) -I$(top_srcdir)/tools/include
+	  $(CLANG_FLAGS) -I$(top_srcdir)/tools/include \
+	  -I$(LINUX_TOOL_ARCH_INCLUDE)
 LDLIBS += -lpthread -ldl
 
 # Own dependencies because we only want to build against 1st prerequisite, but
diff --git a/tools/testing/selftests/vfio/Makefile b/tools/testing/selftests/vfio/Makefile
index 0684932d91bf..0a4cfd1a6c7e 100644
--- a/tools/testing/selftests/vfio/Makefile
+++ b/tools/testing/selftests/vfio/Makefile
@@ -1,6 +1,6 @@
 ARCH ?= $(shell uname -m)
 
-ifeq (,$(filter $(ARCH),aarch64 arm64 x86_64))
+ifeq (,$(filter $(ARCH),aarch64 arm64 x86 x86_64))
 # Do nothing on unsupported architectures
 include ../lib.mk
 else
@@ -27,10 +27,13 @@ CFLAGS += $(EXTRA_CFLAGS)
 
 LDFLAGS += -pthread
 
-$(TEST_GEN_PROGS): %: %.o $(LIBVFIO_O)
+$(TEST_GEN_PROGS): $(OUTPUT)/%: $(OUTPUT)/%.o $(LIBVFIO_O)
 	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $< $(LIBVFIO_O) $(LDLIBS) -o $@
 
 TEST_GEN_PROGS_O = $(patsubst %, %.o, $(TEST_GEN_PROGS))
+$(TEST_GEN_PROGS_O): $(OUTPUT)/%.o: %.c
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c $< -o $@
+
 TEST_DEP_FILES = $(patsubst %.o, %.d, $(TEST_GEN_PROGS_O) $(LIBVFIO_O))
 -include $(TEST_DEP_FILES)
 
diff --git a/tools/testing/selftests/vfio/lib/libvfio.mk b/tools/testing/selftests/vfio/lib/libvfio.mk
index 9f47bceed16f..f90235a1043f 100644
--- a/tools/testing/selftests/vfio/lib/libvfio.mk
+++ b/tools/testing/selftests/vfio/lib/libvfio.mk
@@ -19,11 +19,13 @@ LIBVFIO_OUTPUT := $(OUTPUT)/libvfio
 LIBVFIO_O := $(patsubst %.c, $(LIBVFIO_OUTPUT)/%.o, $(LIBVFIO_C))
 
 LIBVFIO_O_DIRS := $(shell dirname $(LIBVFIO_O) | uniq)
-$(shell mkdir -p $(LIBVFIO_O_DIRS))
+
+$(LIBVFIO_O_DIRS):
+	mkdir -p $@
 
 CFLAGS += -I$(LIBVFIO_SRCDIR)/include
 
-$(LIBVFIO_O): $(LIBVFIO_OUTPUT)/%.o : $(LIBVFIO_SRCDIR)/%.c
+$(LIBVFIO_O): $(LIBVFIO_OUTPUT)/%.o : $(LIBVFIO_SRCDIR)/%.c | $(LIBVFIO_O_DIRS)
 	$(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c $< -o $@
 
 EXTRA_CLEAN += $(LIBVFIO_OUTPUT)