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There are several places in transact_test() where we use the hardcoded
0x1000 (4k) as page size, which is not always correct for architectures
supporting multiple page sizes.
Switch to use the correct page size. Otherwise ./ksft_pagemap.sh on a
16k-page-size arm64 box fails with
$ ./ksft_pagemap.sh
[...]
# ok 96 mprotect_tests Both pages written after remap and mprotect
# ok 97 mprotect_tests Clear and make the pages written
# Bail out! ioctl failed
# # Planned tests != run tests (117 != 97)
# # Totals: pass:97 fail:0 xfail:0 xpass:0 skip:0 error:0
# [FAIL]
not ok 1 pagemap_ioctl # exit=1
# SUMMARY: PASS=0 SKIP=0 FAIL=1
1..1
Link: https://lore.kernel.org/20260628101118.35861-1-zenghui.yu@linux.dev
Fixes: 46fd75d4a3c9 ("selftests: mm: add pagemap ioctl tests")
Signed-off-by: Zenghui Yu <zenghui.yu@linux.dev>
Cc: Muhammad Usama Anjum <usama.anjum@arm.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zenghui Yu <zenghui.yu@linux.dev>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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ksft_process_madv.sh currently runs run_vmtests.sh with the mmap category.
Update it to run the process_madv category, since ksft_mmap.sh already
runs the mmap category tests.
This avoids running mmap tests twice and ensures that process_madv tests
are run through the kselftest harness.
Link: https://lore.kernel.org/20260608103224.344101-1-sarthak.sharma@arm.com
Fixes: 6ce964c02f1c ("selftests/mm: have the harness run each test category separately")
Signed-off-by: Sarthak Sharma <sarthak.sharma@arm.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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test_maps fails in the sockmap test because sockmap_verdict_prog.c
drops the packet when the first 8 bytes are not directly accessible:
if (data + 8 > data_end)
return SK_DROP;
The blamed commit removed bpf_skb_pull_data() from the stream parser
program so that the parser no longer modifies the skb. That was needed,
but it also removed an implicit side effect: bpf_skb_pull_data()
linearized enough of the skb for later direct packet access.
In this test, the send side goes through the sockmap SK_MSG path. The
skb can have skb->len == 20 while its linear area is empty, so the
verdict program sees data == data_end and drops the packet even though
the payload length is sufficient.
Keep the parser read-only, and pull the first 8 bytes in the verdict
program before reading or writing them. Reload data/data_end after
bpf_skb_pull_data() as required.
Fixes: 22a0cc10dacb ("selftests/bpf: don't modify the skb in the strparser parser prog")
Reported-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20260701071501.39628-1-jiayuan.chen@linux.dev
Closes: https://lore.kernel.org/bpf/e3a91acd-2b4d-4e93-a3bb-a0e9ee5ede0f@linux.dev/
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The mptcpify BPF prog upgrades eligible TCP sockets to MPTCP, but only
when the socket type is exactly SOCK_STREAM. Its update_socket_protocol()
hook runs on the raw type from userspace, before the socket core masks
it with SOCK_TYPE_MASK, so the type may still carry SOCK_CLOEXEC or
SOCK_NONBLOCK in its upper bits and the equality check fails.
As a result, a socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0) -- what
common libraries do by default -- is silently left as plain TCP. This
was hit in practice with curl. Since mptcpify.c is referenced as example
code for enabling MPTCP transparently, the same mistake is likely to be
copied into real deployments where it fails the same way and is hard to
diagnose.
Mask the type before comparing, mirroring the socket core. Extend the
test to also create the server with SOCK_CLOEXEC set; the same masking
is applied to start_server_addr() so a flagged type still listens.
Fixes: ddba122428a7 ("selftests/bpf: Add mptcpify test")
Signed-off-by: Guillaume Maudoux <layus.on@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://lore.kernel.org/bpf/20260630095723.564392-1-layus.on@gmail.com
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Adding tracing_multi link info tests that follow the kprobe_multi
and uprobe_multi tests logic.
Assisted-by: Codex:GPT-5
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20260629212208.895962-3-jolsa@kernel.org
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Add a regression test for the out-of-bounds bit operations on
struct mt_device.mt_io_flags.
A HID multitouch device can advertise a ContactCountMaximum far larger
than the number of contacts a single report describes, up to 255. The
driver used to keep the per-slot active state in the bits of a single
unsigned long and index set_bit()/clear_bit() by the slot number, so such
a device drove those operations out of bounds. The sticky-fingers release
timer made it fatal: mt_release_contacts() cleared one bit per slot and
overwrote the adjacent members of struct mt_device.
The new device advertises a ContactCountMaximum of 250 while exposing only
a few finger collections (a large contact count cannot be expressed with
one finger collection per contact within the HID descriptor size limit).
The test sends a single contact and lets the 100ms sticky-fingers timer
release it. A kernel without the fix panics in mt_release_contacts(); a
fixed kernel reports the release cleanly.
Signed-off-by: Trung Nguyen <trungnh@cystack.net>
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
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When lookup element from those per-CPU maps, which have special field
in their values and their value size is not equal to roundup(value_sz, 8),
the padding size of temporary non-zeroed kernel heap memory allocated by
kvmalloc should not be exposed to user space.
Without the fix:
test_map_uninit_mem_exposure:FAIL:zeroed tail bytes unexpected memory mismatch
actual:
2B 2B 2B 2B
expected:
00 00 00 00
Assisted-by: Codex:gpt-5.5
Signed-off-by: Leon Hwang <leon.hwang@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20260624155115.85196-3-leon.hwang@linux.dev
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Add a regression test for the fsuidgid_has_mapping() check in
vfs_tmpfile(). It idmaps a detached tmpfs mount so that the
caller-visible id range [0, 10000) maps onto the on-disk range
[10000, 20000) and checks that:
- a caller whose fsuid/fsgid fall outside that range cannot create an
O_TMPFILE through the mount and gets -EOVERFLOW instead of an inode
owned by (uid_t)-1;
- a mapped caller can create an O_TMPFILE, link it into the namespace,
and the ownership round-trips through the mount idmap: it is reported
as 0 through the mount and stored as 10000 on the underlying tmpfs.
The test runs entirely as root and uses setfsuid()/setfsgid() to become
the unmapped caller, so it needs no helper user. The layer directory is
world-writable so that an unmapped caller still clears the directory
permission check and reaches the fsuidgid_has_mapping() test.
Link: https://patch.msgid.link/20260615-work-idmapped-tmpfile-v1-2-754a94d81f83@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
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Add a HID-BPF regression check for hid_bpf_get_data() requests whose
size would overflow when added to the offset.
The new rdesc fixup callback asks for offset 2 and size ~0ULL, then
records whether the helper returns NULL. A vulnerable kernel returns a
non-NULL pointer because the runtime check wraps the addition. A fixed
kernel rejects the request. The callback records the helper result
without dereferencing any returned pointer.
The callback reports the helper result through BSS and returns 0
intentionally. hid_rdesc_fixup return values are consumed as report
descriptor fixup results, so a positive test-result value would be
interpreted as a replacement report descriptor size.
Also add KHDR_INCLUDES to the HID selftest build so hid_bpf.c sees the
current kernel UAPI HID definitions on systems whose installed headers do
not provide enum hid_report_type.
Fixes: 658ee5a64fcf ("HID: bpf: allocate data memory for device_event BPF programs")
Signed-off-by: Yiyang Chen <chenyy23@mails.tsinghua.edu.cn>
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
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The HID selftest skeleton contains several struct_ops maps, but each test
usually wants to load only the programs named by that test.
load_programs() disabled auto-attach for all maps, but left struct_ops
autocreate enabled. libbpf can enable autoload for programs referenced by
autocreated struct_ops maps, so an unrelated program can be loaded and fail
even when the current test does not use it.
Disable autocreate for all struct_ops maps by default, then re-enable it
only for the maps selected by the test before loading the skeleton.
Signed-off-by: Yiyang Chen <chenyy23@mails.tsinghua.edu.cn>
Fixes: f64c1a459339 ("selftests/hid: disable struct_ops auto-attach")
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
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query_nic_features() detects which offloads depend on tx-gso-partial
by enabling everything, turning tx-gso-partial off, and seeing which
active features drop out. Enabling all hw features is dangerous:
we may end up enabling rx-fcs and loopback for example. For the
ice driver we end up getting into problems with feature dependencies
so the cleanup isn't successful either, and the test exits with
rx-fcs and loopback enabled.
Scope the feature probing just to segmentation bits.
Fixes: 266b835e5e84 ("selftests: drv-net: tso: enable test cases based on hw_features")
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Daniel Zahka <daniel.zahka@gmail.com>
Link: https://patch.msgid.link/20260629233923.2151144-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The UMEM state refactor made __send_pkts() use xsk->umem for Tx
address generation. At the same time, the shared-UMEM Tx setup copies the
Rx UMEM state into a Tx-local state object and resets base_addr and
next_buffer before configuring the Tx socket.
Passing that Tx-local object to xsk_configure() makes xsk->umem point to
the zero-based Tx allocator state. This breaks the BIDIRECTIONAL test once
the roles are switched: the same socket is then used for Rx validation, but
received descriptors from the other logical UMEM half are checked against
base_addr == 0. With the new UMEM bounds check, a valid address such as
base_addr + XDP_PACKET_HEADROOM is rejected as being outside the UMEM
window.
Keep xsk->umem as the shared/Rx UMEM view used for socket configuration
and Rx validation. Use the ifobject-local UMEM copy only for Tx descriptor
address generation, preserving the BIDIRECTIONAL test's intent of using
the proper logical UMEM half after the direction switch.
Reviewed-by: Jason Xing <kerneljasonxing@gmail.com>
Reviewed-by: Tushar Vyavahare <tushar.vyavahare@intel.com>
Tested-by: Tushar Vyavahare <tushar.vyavahare@intel.com>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://patch.msgid.link/20260629191221.2700-1-maciej.fijalkowski@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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We always used 5 sec as the default command timeout. But soon after
it was introduced, David effectively made us ignore the timeout
(it was passed to process.communicate() as the wrong argument).
Gal recently fixed that, but turns out the 5 sec is not enough
for a lot of tests and setups. The fix caused regressions.
In particular running reconfig commands (e.g. XDP attach) on mlx5
with 32 rings and 9k MTU, on a heavily-debug-enabled kernel takes
more than 5 sec. The XDP installation command will time out after
5 sec but since the sleeps in the kernel are non interruptible
the command finishes anyway, leaving the XDP program attached,
but with non-zero exit code. defer()ed cleanups are not installed,
breaking the environment for subsequent tests.
Since "install XDP" is a pretty normal command a "point fix"
does not seem appropriate. 32 rings is a fairly reasonable
config, too, so we should just increase the timeout to 20 sec.
There's no real reason behind the value of 20.
Fixes: 1cf270424218 ("net: selftest: add test for netdev netlink queue-get API")
Fixes: f0bd19316663 ("selftests: net: fix timeout passed as positional argument to communicate()")
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Acked-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Nimrod Oren <noren@nvidia.com>
Link: https://patch.msgid.link/20260629233348.2145841-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Makefile
Link to the uuid library as part of libvfio.mk instead of as only linking
it via VFIO selftests' Makefile, as the whole point of providing libvfio.mk
is to allow linking the VFIO library functionality into KVM selftests,
without KVM selftests having to know the gory details or duplicate code.
Cc: Raghavendra Rao Ananta <rananta@google.com>
Cc: David Matlack <dmatlack@google.com>
Cc: Vipin Sharma <vipinsh@google.com>
Cc: Alex Williamson <alex@shazbot.org>
Fixes: e65f1bf8a2db ("vfio: selftests: Extend container/iommufd setup for passing vf_token")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: David Matlack <dmatlack@google.com>
Link: https://lore.kernel.org/r/20260630212805.474418-1-seanjc@google.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
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Add a type2 accelerator mock driver for the platform device that
simulates a CXL type2 device. The driver exercises the same
minimal API calls that a real CXL type2 driver would utilize.
Tested-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20260629221104.3891733-8-dave.jiang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
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Add support to setup initialization of decoders in order to support
type2 auto region.
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Tested-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20260629221104.3891733-7-dave.jiang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
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Set rc = -ENOMEM at every platform_device_alloc() failure site in
cxl_rch_topo_init(), cxl_single_topo_init() and cxl_test_init() so the
failure is propagated and the module load aborts cleanly.
The cxl_acpi allocation site originates in the commit below, while the
host-bridge/root-port/uport/dport allocation sites fixed here were added
later in the single-host and RCH topology configs.
Fixes: 67dcdd4d3b83 ("tools/testing/cxl: Introduce a mocked-up CXL port hierarchy")
Fixes: e41c8452b9b2 ("tools/testing/cxl: Add a single-port host-bridge regression config")
Fixes: c9435dbee119 ("tools/testing/cxl: Add an RCH topology")
Assisted-by: Claude:claude-opus-4-8
Tested-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20260629221104.3891733-6-dave.jiang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
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Add enumeration of type2 device hierarchy in cxl-test. The type2 device
is setup to be directly attached to a root port instead of rp -> switch
-> device that type3 hierarchy is setup..
Tested-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20260629221104.3891733-5-dave.jiang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
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Split all the host bridges, rootports, upstream and downstream ports
enumerations to separate helper functions. This should make adding
type2 hierarchy easier later on.
Tested-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20260629221104.3891733-4-dave.jiang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
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Add a module parameter 'type2_test' for triggering type2 test support
in cxl_test. Setup the CFMWS0 configuration to be type2 when 'type2_test'
is set.
Tested-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20260629221104.3891733-3-dave.jiang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
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Add a test for module paraters during module init to make sure that
only one is activated.
[dj: Dropped counting fail_autoassemble modparm. (Alison) ]
Suggested-by: Alison Schofield <alison.schofield@intel.com>
Tested-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20260629221104.3891733-2-dave.jiang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
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loopy_wait() expects millisecond timestamps. However, Ubuntu Resolute
can use uutils date, where `date -u +%s%3N` returns seconds plus full
nanoseconds instead of a 3-digit millisecond field. This makes
busywait expire too early and can make vlan_bridge_binding.sh read a
stale operstate.
Link: https://github.com/uutils/coreutils/issues/11658
Signed-off-by: Nirmoy Das <nirmoyd@nvidia.com>
Link: https://patch.msgid.link/20260626144902.3214350-1-nirmoyd@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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For lower HZ values a quota of 1000us is much lower than the amount
of microseconds per tick which makes the tests test_cpucg_max and
test_cpugc_max_nested fail. Increase the test duration to accommodate
for lower HZ values.
Link: https://lore.kernel.org/lkml/20260625203307.1114538-1-joest@redhat.com/
Signed-off-by: Joe Simmons-Talbott <joest@redhat.com>
Acked-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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Add a selftest for idmapping the merged overlay mount itself. It
applies an idmapping to a freshly created (still detached) overlay
mount with mount_setattr(MOUNT_ATTR_IDMAP) and checks that:
- getattr reports ownership mapped through the mount idmap;
- a file created through the idmapped mount is stored on the upper
layer with the corresponding overlay-final id;
- chown through the idmapped mount round-trips;
- an nfs_export overlay can be idmapped and decodable file handles
round-trip through it with correctly mapped ownership.
The layers live on a private tmpfs and are owned by the host id so that
they map to id 0 through the test idmapping, allowing the root caller
to operate on them.
Link: https://patch.msgid.link/20260615-work-idmapped-overlayfs-v1-9-7381632aa402@kernel.org
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
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set_layers_via_fds.c calls open_tree() directly, but that wrapper is
not provided by all C libraries, so the test fails to link with
"undefined reference to open_tree" on toolchains without it.
Use sys_open_tree() from ../wrappers.h, the syscall wrapper already
used for move_mount(), fsmount() and friends here. This is also a
prerequisite for building the new idmapped_mounts test added to this
directory.
Link: https://patch.msgid.link/20260615-work-idmapped-overlayfs-v1-8-7381632aa402@kernel.org
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
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user_get_super() is now backed by the global device-to-superblock table
instead of a walk of the super_blocks list. ustat(2) is its most direct
user-visible consumer but nothing in the tree exercises it.
Add a small regression test: the device number of a mounted tmpfs (an
anonymous device, registered in the table by sget_fc()) must resolve,
it must stop resolving after the unmount (the entry is dropped again in
kill_super_notify()), and bogus device numbers keep reporting EINVAL.
The test passes on kernels before the conversion: it pins down the
semantics the table-backed lookup must preserve.
Link: https://patch.msgid.link/20260616-work-super-bdev_holder_global-v2-18-7df6b864028e@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
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Add a selftest that loads the kfunc in sleepable and non-sleepable
lsm/socket_connect programs and checks that a value set via fsetxattr()
on a socket is read back.
Link: https://patch.msgid.link/20260617-work-bpf-sock-xattr-v1-2-a1276f7c9da3@kernel.org
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
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proc-pidns.c uses open() and O_* flags, but does not include
<fcntl.h>. This breaks the proc selftests build with errors such as:
error: implicit declaration of function 'open'
error: 'O_WRONLY' undeclared
error: 'O_CREAT' undeclared
error: 'O_RDONLY' undeclared
Include <fcntl.h> to provide the declaration and flag definitions.
Fixes: 5554d820f71c ("selftests/proc: add tests for new pidns APIs")
Tested with:
make -C tools/testing/selftests TARGETS=proc
Signed-off-by: Amin Vakil <info@aminvakil.com>
Link: https://patch.msgid.link/20260618151444.124739-1-info@aminvakil.com
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
Pull LoongArch updates from Huacai Chen:
- Add THREAD_INFO_IN_TASK implementation
- Add build salt to the vDSO
- Add some BPF JIT inline helpers
- Update DTS for I2C clocks and clock-frequency
- Some bug fixes and other small changes
* tag 'loongarch-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
selftests/bpf: Test jited inline of bpf_get_smp_processor_id() for LoongArch
selftests/bpf: Test jited inline of bpf_get_current_task() for LoongArch
selftests/bpf: Add __arch_loongarch to limit test cases for LoongArch
selftests/bpf: Add get_preempt_count() support for LoongArch
LoongArch: dts: Add i2c clocks and clock-frequency properties to LS2K2000
LoongArch: dts: Add i2c clocks and clock-frequency properties to LS2K1000
LoongArch: dts: Add i2c clocks and clock-frequency properties to LS2K0500
LoongArch: BPF: Inline bpf_get_smp_processor_id() helper
LoongArch: BPF: Inline bpf_get_current_task/_btf() helpers
LoongArch: BPF: Fix off-by-one error in tail call
LoongArch: BPF: Fix outdated tail call comments
LoongArch: Add build salt to the vDSO
LoongArch: Fix nr passing in set_direct_map_valid_noflush()
LoongArch: Fix missing dirty page tracking in {pte,pmd}_wrprotect()
LoongArch: Move struct kimage forward declaration before use
LoongArch: Report dying CPU to RCU in stop_this_cpu()
LoongArch: Add PIO for early access before ACPI PCI root register
LoongArch: Add THREAD_INFO_IN_TASK implementation
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Extend the resolve_btfids selftest to cover kfunc sets defined with
BTF_KFUNCS_START/BTF_KFUNCS_END.
The test verifies that resolve_btfids correctly processes BTF_ID_FLAGS,
resolves function IDs, and checks the kfunc set is sorted.
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260624005546.1818483-5-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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TL;DR
On aarch64 with gcc toolchain, when test_progs is linked as a PIE,
reads of BTF ID array by C name return garbage because the GNU
assembler on aarch64 unconditionally folds .local symbol references
into section+addend form, and GOT slots cannot carry an addend per the
AArch64 ELF spec.
Fix by marking the test's BTF ID objects with hidden visibility, which
makes gcc emit a direct access that bypasses the GOT entirely.
Details below.
The subsequent patches adding kfunc checks to resolve_btfids test may
cause test failures on aarch64 / gcc-15:
test_resolve_btfids:FAIL:kfunc_set_flags actual 13 != expected 1
test_resolve_btfids:FAIL:kfunc_set_cnt actual 0 != expected 4
The test defines its BTF ID sets with the same macros as the kernel
and reads them back directly by C name (in the same way as the kernel
code does).
test_kfunc_set is a .local symbol emitted into .BTF_ids by inline asm
and declared to the compiler as a plain default-visibility
extern, that is:
extern struct btf_id_set8 test_kfunc_set;
Depending on the build environment, test_progs may be linked as a
position-independent executable (for example, gcc defaults to -fpie
[1]). In a PIE, taking the address of a default-visibility extern is
routed through the GOT (Global Offset Table) [2].
The GNU assembler's adjust_reloc_syms() pass (gas/write.c [3])
replaces references to local symbols with the corresponding section
symbol, folding the symbol's offset into the relocation addend. On
aarch64 this conversion is unconditional: tc_fix_adjustable() is
defined to 1 for all fixups (gas/config/tc-aarch64.h [4]), so even
GOT-generating relocations are subject to it. The resulting object
file therefore contains:
R_AARCH64_ADR_GOT_PAGE .BTF_ids + 0x54
R_AARCH64_LD64_GOT_LO12_NC .BTF_ids + 0x54
However, the AArch64 ELF specification mandates that GOT-generating
relocations must have a zero addend [5]. The +0x54 is therefore not
honored: the linker creates a GOT slot pointing at the .BTF_ids base,
and every access through that slot reads offset 0 instead of 0x54.
This is purely a read-side problem, specific to the PIE test binary on
aarch64 with gcc toolchain. resolve_btfids patches the set header
correctly and the .BTF_ids bytes in test_progs are correct. vmlinux is
unaffected because it is built with -fno-PIE [6] and reaches .BTF_ids
with direct, addend-preserving relocations rather than the GOT. clang
is unaffected because LLVM's assembler retains the original symbol for
GOT relocations instead of converting to section+addend [7].
To mitigate this issue, mark the test's .local BTF ID objects
(test_list_local and test_set) hidden with a visibility pragma so that
gcc treats them as non-interposable and emits a direct access instead
of a GOT load. test_list_global is .globl, which the assembler does not
fold into section+addend, so it is left at default visibility. This
keeps the natural by-name access, works in both PIE and non-PIE builds,
and needs no change to the BTF_ID macros or resolve_btfids.
[1] https://gcc.gnu.org/onlinedocs/gnat_ugn/Position-Independent-Executable-PIE-Enabled-by-Default-on-Linux.html
[2] https://gcc.gnu.org/wiki/Visibility
[3] https://sourceware.org/git/?p=binutils-gdb.git;a=blob;f=gas/write.c#l922
[4] https://sourceware.org/git/?p=binutils-gdb.git;a=blob;f=gas/config/tc-aarch64.h#l279
[5] https://github.com/ARM-software/abi-aa/blob/main/aaelf64/aaelf64.rst#5733relocation-operations
[6] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Makefile?h=v7.1-rc6#n593
[7] https://github.com/llvm/llvm-project/blob/4b3bc46d1d794b8ed78b75ccd35a6cc30235bf31/llvm/lib/MC/ELFObjectWriter.cpp#L1213-L1224
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Link: https://lore.kernel.org/r/20260624005546.1818483-4-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Refactor resolve_btfids test in order to:
* use newer ASSERT_* macros instead of CHECK
* extend the lifetime of loaded BTF to enable additional checks
* cleanup unused/unnecessary code
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Link: https://lore.kernel.org/r/20260624005546.1818483-3-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Add verifier_unpriv coverage for a raw socket-filter load of the
bpf_prog_active typed ksym. The test verifies that the unprivileged load
remains accepted and that the verbose verifier log prints the ldimm64
immediate as 0x0 instead of exposing a nonzero kernel address.
Signed-off-by: Nuoqi Gui <gnq25@mails.tsinghua.edu.cn>
Link: https://lore.kernel.org/r/20260623-f01-13-pseudo-btf-id-cap-bpf-v2-2-a190ebb8f3e2@mails.tsinghua.edu.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
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Add verifier_var_off coverage for variable-offset stack reads from spilled
scalar constant zero values.
Cover single-slot and cross-slot spilled zero reads, a sub-8-byte spill
with neighbouring STACK_ZERO bytes, and a sub-8-byte spill with
neighbouring STACK_MISC bytes that must not be treated as zero.
Add verifier_spill_fill coverage for a fixed-offset stack read spanning
both STACK_ZERO bytes and scalar const-zero STACK_SPILL bytes.
Use verifier log assertions to check both the zero result and the precision
backtracking trail.
Assisted-by: opencode:gpt-5.5
Signed-off-by: Woojin Ji <random6.xyz@gmail.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260625-bpf-stack-var-off-zero-v1-v3-2-a068210a761b@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Add regression coverage for bpf_refcount_acquire() on graph-node-derived
pointers.
The rejected case passes a popped list node pointer directly to
bpf_refcount_acquire(), which must fail because the pointer carries a
non-zero fixed offset.
Signed-off-by: Yiyang Chen <chenyy23@mails.tsinghua.edu.cn>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/bf2a2033ced272106292de4465b8ef3fb991c912.1782192383.git.chenyy23@mails.tsinghua.edu.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Verify that attaching an SK_SKB stream parser that can modify the packet
is rejected, while a read-only parser still attaches.
Reviewed-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Signed-off-by: Sechang Lim <rhkrqnwk98@gmail.com>
Link: https://lore.kernel.org/r/20260620024423.4141004-4-rhkrqnwk98@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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sockmap_parse_prog.c is attached as an SK_SKB stream parser and modifies
the skb: it calls bpf_skb_pull_data() and writes a byte into the packet.
A stream parser runs on strparser's message head and must not modify it.
A resize frees the frag_list segments strparser still tracks, leading to
a use-after-free.
Make the parser read-only. It only needs to return the message length,
which keeps it attaching once packet-modifying parsers are rejected.
Reviewed-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Signed-off-by: Sechang Lim <rhkrqnwk98@gmail.com>
Link: https://lore.kernel.org/r/20260620024423.4141004-2-rhkrqnwk98@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Extend redirect tests to cover bpf_redirect_peer(BPF_F_EGRESS). SRC
redirects to DST using bpf_redirect_peer(BPF_F_EGRESS) then traffic is
hairpinned into DST using bpf_redirect.
Signed-off-by: Jordan Rife <jordan@jrife.io>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Paul Chaignon <paul.chaignon@gmail.com>
Link: https://lore.kernel.org/r/20260618182035.43811-3-jordan@jrife.io
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Pull bpf fixes from Alexei Starovoitov:
- Fix effective prog array index with BPF_F_PREORDER (Amery Hung)
- Zero-initialize the fib lookup flow struct (Avinash Duduskar)
- Disable xfrm_decode_session hook attachment (Bradley Morgan)
- Allow type tag BTF records to succeed other modifier records (Emil
Tsalapatis)
- Fix build_id caching in stack_map_get_build_id_offset() (Ihor
Solodrai)
- Add missing access_ok call to copy_user_syms (Jiri Olsa)
- Fix stack slot index in nospec checks (Nuoqi Gui)
- Preserve pointer spill metadata during half-slot cleanup (Nuoqi Gui)
- Fix partial copy of non-linear test_run output (Sun Jian)
- Fix BPF_PROG_ASSOC_STRUCT_OPS last field check (Thiébaud Weksteen)
- Reset register bounds before narrowing retval range (Tristan Madani)
- Fix vmlinux BTF leak in bpftool cgroup commands (Yichong Chen)
- Guard error writes in conntrack kfuncs (Yiyang Chen)
* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
bpf: Disable xfrm_decode_session hook attachment
selftests/bpf: Add test for stale bounds on LSM retval context load
bpf: Reset register bounds before narrowing retval range in check_mem_access()
selftests/bpf: Cover small conntrack opts error writes
bpf: Guard conntrack opts error writes
selftests/bpf: Cover half-slot cleanup of pointer spills
bpf: Preserve pointer spill metadata during half-slot cleanup
selftests/bpf: Test cgroup link replace with BPF_F_PREORDER
bpf: Fix effective prog array index with BPF_F_PREORDER
bpf: Fix BPF_PROG_ASSOC_STRUCT_OPS last field check
bpf: zero-initialize the fib lookup flow struct
bpftool: Fix vmlinux BTF leak in cgroup commands
bpf: Add missing access_ok call to copy_user_syms
bpf: Allow type tag BTF records to succeed other modifier records
bpf: Emit verbose message when prog-specific btf_struct_access rejects a write
bpf: Fix build_id caching in stack_map_get_build_id_offset()
bpf: Fix partial copy of non-linear test_run output
selftests/bpf: Cover stack nospec slot indexing
bpf: Fix stack slot index in nospec checks
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from netfilter and IPsec.
Current release - regressions:
- do not acquire dev->tx_global_lock in netdev_watchdog_up()
- ethtool: keep rtnl_lock for ops using ethtool_op_get_link()
- fix deadlock in nested UP notifier events
Current release - new code bugs:
- eth:
- cn20k: fix subbank free list indexing for search order
- airoha: fix BQL underflow in shared QDMA TX ring
Previous releases - regressions:
- netfilter:
- flowtable: fix offloaded ct timeout never being extended
- nf_conncount: prevent connlimit drops for early confirmed ct
Previous releases - always broken:
- require CAP_NET_ADMIN in the originating netns when modifying
cross-netns devices
- report NAPI thread PID in the caller's pid namespace
- mac802154: fix dirty frag in in-place crypto for IOT radios
- sctp: hold socket lock when dumping endpoints in sctp_diag, avoid
an overflow
- eth: gve: fix header buffer corruption with header-split and HW-GRO
- af_key: initialize alg_key_len for IPComp states, prevent OOB read"
* tag 'net-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (213 commits)
selftests: bonding: add a test for VLAN propagation over a bonded real device
vlan: defer real device state propagation to netdev_work
net: add the driver-facing netdev_work scheduling API
net: turn the rx_mode work into a generic netdev_work facility
net: ethtool: keep rtnl_lock for ops using ethtool_op_get_link()
rxrpc: Fix rxrpc_rotate_tx_rotate() to check there's something to rotate
rxrpc: Fix leak of released call in recvmsg(MSG_PEEK)
rxrpc: Fix socket notification race
rxrpc: Fix potential infinite loop in rxrpc_recvmsg()
rxrpc: Fix oob challenge leak in cleanup after notification failure
rxrpc: Fix the reception of a reply packet before data transmission
afs: Fix uncancelled rxrpc OOB message handler
afs: Fix further netns teardown to cancel the preallocation charger
rxrpc: Fix double unlock in rxrpc_recvmsg()
rxrpc: Fix leak of connection from OOB challenge
rxrpc: Fix ACKALL packet handling
net: hns3: differentiate autoneg default values between copper and fiber
net: hns3: fix permanent link down deadlock after reset
net: hns3: refactor MAC autoneg and speed configuration
net: hns3: unify copper port ksettings configuration path
...
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Pull kvm fixes from Paolo Bonzini:
"s390:
- Fix S390_USER_OPEREXEC so it can now be enabled regardless of other
unrelated capabilities
- Fix handling of the _PAGE_UNUSED pte bit that could lead to guest
memory corruption in some scenarios
- A bunch of misc gmap fixes (locking, behaviour under memory
pressure)
- Fix CMMA dirty tracking
x86:
- Tidy up some WARN_ON() and BUG_ON(), replacing them with
WARN_ON_ONCE() or KVM_BUG_ON(). All of these have obviously never
triggered, or somebody would have been annoyed earlier, but still...
- Fix missing interrupt due to stale CR8 intercept
- Add a statistic that can come in handy to debug leaks as well as
the vulnerability to a class of recently-discovered issues
- Do not ask arch/x86/kernel to export
default_cpu_present_to_apicid() just for KVM"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (22 commits)
x86/apic: KVM: Use cpu_physical_id() to get APIC ID of running vCPU for AVIC
KVM: x86/mmu: Expose number of shadow MMU shadow pages as a stat
KVM: x86: Unconditionally recompute CR8 intercept on PPR update
KVM: VMX: Grab vmcs12 on CR8 interception update iff vCPU is in guest mode
KVM: x86: WARN (once) if RTC pending EOI tracking goes off the rails
KVM: x86: WARN and fail kvm_set_irq() if a PIC or I/O APIC vector is invalid
KVM: x86: Bug the VM, not the kernel, if the ISR count {under,over}flows
KVM: x86/mmu: Bug the VM, not the host kernel, if KVM write-protects upper SPTEs
KVM: x86: Replace BUG_ON() with WARN_ON_ONCE() on "bad" nested GPA translation
KVM: Replace guest-triggerable BUG_ON() in ioeventfd datamatch with get_unaligned()
KVM: s390: Return failure in case of failure in kvm_s390_set_cmma_bits()
KVM: s390: selftests: Fix cmma selftest
KVM: s390: Fix cmma dirty tracking
KVM: s390: Fix locking in kvm_s390_set_mem_control()
KVM: s390: Fix handle_{sske,pfmf} under memory pressure
KVM: s390: Fix code typo in gmap_protect_asce_top_level()
KVM: s390: Do not set special large pages dirty
KVM: s390: Fix dat_peek_cmma() overflow
s390/mm: Fix handling of _PAGE_UNUSED pte bit
KVM: s390: Fix typo in UCONTROL documentation
...
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Add a regression test for the VLAN notifier handling that the netdev_work
deferral fixed.
A VLAN's real device propagates its UP/DOWN, MTU and feature changes onto
the VLANs stacked on top of it. This used to be done synchronously from the
real device's notifier and deadlocked when the real device was brought up
while enslaved to a bond (instance lock held across NETDEV_UP) and the VLAN
on top was itself a bond member: the synchronous propagation re-entered the
stack and took the same instance lock again.
The test covers both halves:
- that the deferred UP/DOWN, MTU and feature propagation actually lands on
the VLAN (link state and MTU use an ops-locked dummy, i.e. the deferral
path; features use veth, which exports vlan_features to inherit), and
- that the deadlock-prone topology - a VLAN on a dummy, with the VLAN and
the dummy each enslaved to a different bond - can be built without
hanging.
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20260624182018.2445732-5-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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splice_short grows its pipe with (MAX_FRAGS + 1) * 0x1000 so it can
queue one short vmsplice() buffer for each fragment before draining the
pipe. That assumes 4K pipe buffers.
On 64K-page kernels the request is rounded to 262144 bytes, which
provides only four pipe buffers. The fifth one-byte vmsplice() blocks in
pipe_wait_writable and the test times out before it reaches the TLS path.
Request enough bytes for the same number of pipe buffers using the
runtime page size, and assert that the kernel granted at least that much.
If an unprivileged run cannot raise the pipe above the system
pipe-max-size limit, skip the test because it cannot exercise the
intended path.
Fixes: 3667e9b442b9 ("selftests: tls: add test for short splice due to full skmsg")
Signed-off-by: Nirmoy Das <nirmoyd@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260624134416.3235403-1-nirmoyd@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add the testcase for the jited inline of bpf_get_smp_processor_id(),
only for LoongArch currently.
Here is the test result on LoongArch:
$ sudo ./test_progs -t verifier_jit_inline
#604/1 verifier_jit_inline/inline_bpf_get_current_task:OK
#604/2 verifier_jit_inline/inline_bpf_get_smp_processor_id:OK
#604 verifier_jit_inline:OK
Summary: 1/2 PASSED, 0 SKIPPED, 0 FAILED
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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Add the jited inline instruction of bpf_get_current_task() for LoongArch
to pass the test case.
Before:
$ sudo ./test_progs -t verifier_jit_inline
#604/1 verifier_jit_inline/inline_bpf_get_current_task:SKIP
#604 verifier_jit_inline:SKIP
Summary: 1/0 PASSED, 1 SKIPPED, 0 FAILED
After:
$ sudo ./test_progs -t verifier_jit_inline
#604/1 verifier_jit_inline/inline_bpf_get_current_task:OK
#604 verifier_jit_inline:OK
Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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Make it possible to limit certain tests to LoongArch, just like it is
already done for x86_64, arm64, riscv64, and s390x.
This is a follow up patch of:
commit ee7fe84468b1 ("selftests/bpf: __arch_* macro to limit test cases to specific archs")
commit 1e4e6b9e260d ("selftests/bpf: Add __arch_s390x macro")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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There is no LoongArch support for get_preempt_count() currently and its
fallback path always returns 0, just add it so that bpf_in_interrupt(),
bpf_in_nmi(), bpf_in_hardirq(), bpf_in_serving_softirq(), bpf_in_task()
work for LoongArch as well.
The latest kernels select CONFIG_THREAD_INFO_IN_TASK, it can just read
preempt_count from the thread_info which is embedded within task_struct.
With this patch, "./test_progs -t exe_ctx" passes on LoongArch.
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
Pablo Neira Ayuso says:
====================
Netfilter fixes for net
The following patchset contains Netfilter fixes for net:
1) Add a workaround to avoid a possible crash if nf_nat and nft_chain_nat are
compiled built-in and nf_nat fails to register, allowing nft_chain_nat to
access the incorrect pernetns area. This is crash specific of all built-in
compilation. From Matias Krause.
2) Revisit conncount GC optimization for confirmed conntracks, skip GC round
if IPS_ASSURED is set on. This is addressing an issue for corner case
use case scenario involving locally generated traffic. No crash, just a
functionality fix. From Fernando F. Mancera.
3) Validate iph->ihl in flowtable IPIP tunnel support, from Lorenzo Bianconi.
This a sanity check to bounces back malformed IPIP packets to classic
forwarding path.
4) Kdoc fixes for x_tables.h, from Randy Dunlap.
5) Use info->options so nft_synproxy_tcp_options() stays on the same local
snapshot, otherwise eval path can observe inconsistent mix of mss and
timestamps. From Runyu Xiao.
6) Add conntrack_sctp_collision.sh to cover for SCTP INIT collisions.
From Yi Chen.
7) Do not allow NFPROTO_UNSPEC targets if family is NFPROTO_BRIDGE in
nft_compat. This allows to use non-sense targets such as xt_nat leading
to crash. From Florian Westphal.
8) Add a selftest queueing from bridge family. From Florian Westphal.
9) Do not allow to reset a conntrack helper via ctnetlink. This feature
antedates the creation of the conntrack-tools, and it is not used
I don't have a usecase for it, I prefer to remove than fixing it.
10) Add deprecation warning for IPv4 only conntrack helpers for PPTP
and IRC. From Florian Westphal.
11) Store the master tuple in the expectation object and use it,
otherwise SLAB_TYPESAFE_RCU rules allow to display incorrect
master tuple information through ctnetlink.
12) Run expectation eviction when inserting an expectation with no
helper, this is a fix for the nft_ct custom expectation support.
13) Fix nft_ct custom expectation timeouts, userspace provides a
timeout in milliseconds but kernel assumes this comes in seconds.
From Florian Westphal.
14) Cap maximum number of expectations per class to 255 expectations
per master conntrack at helper registration. This is a fix to
restrict the maximum number of expectations per master conntrack
which can be a issue for the new lazy GC expectation approach.
* tag 'nf-26-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
netfilter: nf_conntrack_helper: cap maximum number of expectation at helper registration
netfilter: nft_ct: expectation timeouts are passed in milliseconds
netfilter: nf_conntrack_expect: run expectation eviction with no helper
netfilter: nf_conntrack_expect: store master_tuple in expectation
netfilter: conntrack: add deprecation warnings for irc and pptp trackers
netfilter: ctnetlink: do not allow to reset helper on existing conntrack
selftests: nft_queue.sh: add a bridge queue test
netfilter: nft_compat: ebtables emulation must reject non-bridge targets
selftests: netfilter: conntrack_sctp_collision.sh: Introduce SCTP INIT collision test
netfilter: nft_synproxy: stop bypassing the priv->info snapshot
netfilter: x_tables.h: fix all kernel-doc warnings
netfilter: flowtable: Validate iph->ihl in nf_flow_ip4_tunnel_proto()
netfilter: nf_conncount: prevent connlimit drops for early confirmed ct
netfilter: nf_nat: avoid invalid nat_net pointer use on failed nf_nat_init()
====================
Link: https://patch.msgid.link/20260623221548.701545-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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cpuset_hotplug_update_tasks()
As reported by sashiko [1], cpuset_hotplug_update_tasks() may perform
unnecessary task iteration and updating of tasks' CPU and node masks
when mems_allowed and/or cpus_allowed are not set in cpuset v2. It is
due to the fact that the temporary new_cpus and new_mems masks do not
inherit parent's effective_cpus/mems when they are empty which is the
expected behavior for cpuset v2 since commit 4ec22e9c5a90 ("cpuset:
Enable cpuset controller in default hierarchy").
Fix that and avoid unnecessary work by enhancing
compute_effective_cpumask() to add the empty cpumask check
and inheriting the parent's versions if empty when in v2. A new
compute_effective_nodemask() helper is also added to perform a similar
function for new effective_mems.
Add new test_cpuset_prs.sh test cases to confirm that effective_cpus
will inherit the parent's version if cpuset.cpus is empty.
[1] https://sashiko.dev/#/patchset/20260621032816.1806773-1-longman%40redhat.com
Suggested-by: Ridong Chen <ridong.chen@linux.dev>
Fixes: 4ec22e9c5a90 ("cpuset: Enable cpuset controller in default hierarchy")
Signed-off-by: Waiman Long <longman@redhat.com>
Reviewed-by: Ridong Chen <ridong.chen@linux.dev>
Signed-off-by: Tejun Heo <tj@kernel.org>
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https://github.com/kvm-x86/linux into HEAD
KVM selftests for 7.3, early edition
- Automatically allocate a full page for L2 guest stacks on x86 instead of
requiring test-specific L1 guest code to carve out a portion of the L1
stack for L2 usage, and to ensure the L2 stack also adheres to the x86-64
calling convention ABI.
- Add a selftest to verify {Guest,Host}-Only behavior in x86's mediated PMU.
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