linux-stable.git/tools/include, branch linux-6.6.y

selftests/bpf: Add simple strscpy() implementation

2026-07-24T14:03:54+00:00

commit 63c49efc987afefc6b9bb7de083eb8748e0b1789 upstream.

Replace bpf_strlcpy() in bpf_util.h with a sized_strscpy(), which is a
simplified sized_strscpy() from the kernel (lib/string.c [1]). It:
  * takes a count (destination size) parameter
  * guarantees NULL-termination
  * returns the number of characters copied or -E2BIG

Re-define strscpy macro similar to in-kernel implementation [2]: allow
the count parameter to be optional.

Add #ifdef-s to tools/include/linux/args.h, as they may be defined in
other system headers (for example, __CONCAT in sys/cdefs.h).

Fixup the single existing bpf_strlcpy() call in cgroup_helpers.c

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/lib/string.c?h=v6.19#n113
[2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/linux/string.h?h=v6.19#n91

Signed-off-by: Ihor Solodrai 
Link: https://lore.kernel.org/r/20260223190736.649171-2-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov 
Stable-dep-of: 55ffbe8a15b1 ("selftests/bpf: Initialize operation name before use")
Signed-off-by: Shung-Hsi Yu 
Signed-off-by: Greg Kroah-Hartman

tools/testing: add linux/args.h header and fix radix, VMA tests

2026-07-24T14:03:53+00:00

commit 9a6a6a3191574a01dcf7a7d9385246d7bc8736bc upstream.

Commit 857d18f23ab1 ("cleanup: Introduce ACQUIRE() and ACQUIRE_ERR() for
conditional locks") accidentally broke the radix tree, VMA userland tests
by including linux/args.h which is not present in the tools/include
directory.

This patch copies this over and adds an #ifdef block to avoid duplicate
__CONCAT declaration in conflict with system headers when we ultimately
include this.

Link: https://lkml.kernel.org/r/20250811052654.33286-1-lorenzo.stoakes@oracle.com
Fixes: 857d18f23ab1 ("cleanup: Introduce ACQUIRE() and ACQUIRE_ERR() for conditional locks")
Signed-off-by: Lorenzo Stoakes 
Cc: Jann Horn 
Cc: John Hubbard 
Cc: Liam Howlett 
Cc: Sidhartha Kumar 
Cc: Vlastimil Babka 
Cc: Dan Williams 
Cc: Peter Zijlstra 
Signed-off-by: Andrew Morton 
Stable-dep-of: 63c49efc987a ("selftests/bpf: Add simple strscpy() implementation")
[shung-hsi.yu: tools/testing/shared/linux/idr.h was
tools/testing/radix-tree/linux/idr.h before commit 579d8dab47 ("tools: separate
out shared radix-tree components"). ]
Signed-off-by: Shung-Hsi Yu 
Signed-off-by: Greg Kroah-Hartman

bitops: make BYTES_TO_BITS() treewide-available

2026-07-24T14:03:47+00:00

[ Upstream commit 7d8296b250f2eed73f1758607926d4d258dea5d4 ]

Avoid open-coding that simple expression each time by moving
BYTES_TO_BITS() from the probes code to  to export
it to the rest of the kernel.
Simplify the macro while at it. `BITS_PER_LONG / sizeof(long)` always
equals to %BITS_PER_BYTE, regardless of the target architecture.
Do the same for the tools ecosystem as well (incl. its version of
bitops.h). The previous implementation had its implicit type of long,
while the new one is int, so adjust the format literal accordingly in
the perf code.

Suggested-by: Andy Shevchenko 
Reviewed-by: Przemek Kitszel 
Acked-by: Yury Norov 
Signed-off-by: Alexander Lobakin 
Signed-off-by: David S. Miller 
Stable-dep-of: 55052184ac90 ("iio: common: st_sensors: honour channel endianness in read_axis_data")
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

bpf: Check tail zero of bpf_prog_info

2026-07-24T14:03:07+00:00

[ Upstream commit 786be2b05980a5828e67fc564ad7517e2adbe9bd ]

Since there're 4 bytes padding at the end of struct bpf_prog_info, they
won't be checked by bpf_check_uarg_tail_zero().

pahole -C bpf_prog_info ./vmlinux
struct bpf_prog_info {
	...
	__u32                      attach_btf_obj_id;    /*   220     4 */
	__u32                      attach_btf_id;        /*   224     4 */

	/* size: 232, cachelines: 4, members: 38 */
	/* sum members: 224 */
	/* sum bitfield members: 1 bits, bit holes: 1, sum bit holes: 31 bits */
	/* padding: 4 */
	/* forced alignments: 9 */
	/* last cacheline: 40 bytes */
} __attribute__((__aligned__(8)));

If a future kernel extension adds a new 4-byte field, older userspace
programs allocating this structure on the stack might inadvertently pass
uninitialized stack garbage into the new field, permanently breaking
backward compatibility. -- sashiko [1]

Fix it by changing sizeof(info) to
offsetofend(struct bpf_prog_info, attach_btf_id).

And, add "__u32 :32" to the tail of struct bpf_prog_info.

[1] https://lore.kernel.org/bpf/20260513224823.6494FC19425@smtp.kernel.org/

Fixes: aba64c7da983 ("bpf: Add verified_insns to bpf_prog_info and fdinfo")
Acked-by: Mykyta Yatsenko 
Signed-off-by: Leon Hwang 
Link: https://lore.kernel.org/r/20260605155249.20772-3-leon.hwang@linux.dev
Signed-off-by: Alexei Starovoitov 
Signed-off-by: Sasha Levin

bpf: Add CHECKSUM_COMPLETE to bpf test progs

2026-05-23T11:03:06+00:00

[ Upstream commit a3cfe84cca28f205761a0450016593b0d728165e ]

Add special flag to validate that TC BPF program properly updates
checksum information in skb.

Signed-off-by: Vadim Fedorenko 
Signed-off-by: Daniel Borkmann 
Reviewed-by: Jakub Kicinski 
Acked-by: Daniel Borkmann 
Link: https://lore.kernel.org/bpf/20240606145851.229116-1-vadfed@meta.com
Stable-dep-of: 972787479ee7 ("bpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap")
Signed-off-by: Sasha Levin

tools: Fix bitfield dependency failure

2026-03-04T12:21:13+00:00

[ Upstream commit a537c0da168a08b0b6a7f7bd9e75f4cc8d45ff57 ]

A perf build failure was reported by Thomas Voegtle on stable kernel
v6.6.120:

    CC      tests/sample-parsing.o
    CC      util/intel-pt-decoder/intel-pt-pkt-decoder.o
    CC      util/perf-regs-arch/perf_regs_csky.o
    CC      util/arm-spe-decoder/arm-spe-pkt-decoder.o
    CC      util/perf-regs-arch/perf_regs_loongarch.o
  In file included from util/arm-spe-decoder/arm-spe-pkt-decoder.h:10,
                   from util/arm-spe-decoder/arm-spe-pkt-decoder.c:14:
  /local/git/linux-stable-rc/tools/include/linux/bitfield.h: In function ‘le16_encode_bits’:
  /local/git/linux-stable-rc/tools/include/linux/bitfield.h:166:31: error: implicit declaration of
  function ‘cpu_to_le16’; did you mean ‘htole16’? [-Werror=implicit-function-declaration]
    ____MAKE_OP(le##size,u##size,cpu_to_le##size,le##size##_to_cpu) \
                                 ^~~~~~~~~
  /local/git/linux-stable-rc/tools/include/linux/bitfield.h:149:9: note: in definition of macro
  ‘____MAKE_OP’
    return to((v & field_mask(field)) * field_multiplier(field)); \
           ^~
  /local/git/linux-stable-rc/tools/include/linux/bitfield.h:170:1: note: in expansion of macro
  ‘__MAKE_OP’
   __MAKE_OP(16)

Fix this by including linux/kernel.h, which provides the required
definitions.

The issue was not found on the mainline due to the relevant C files have
included kernel.h.  It'd be good to merge this change on mainline
as well for robustness.

Closes: https://lore.kernel.org/stable/3a44500b-d7c8-179f-61f6-e51cb50d3512@lio96.de/
Fixes: 64d86c03e1441742 ("perf arm-spe: Extend branch operations")
Reported-by: Hamza Mahfooz 
Reported-by: Thomas Voegtle 
Signed-off-by: Leo Yan 
Cc: Greg Kroah-Hartman 
Cc: Ian Rogers 
Cc: James Clark 
Cc: Leo Yan 
Cc: Namhyung Kim 
To: Sasha Levin 
Cc: stable@vger.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Sasha Levin

tools/nolibc/stdio: let perror work when NOLIBC_IGNORE_ERRNO is set

2026-01-11T14:21:17+00:00

[ Upstream commit c485ca3aff2442adea4c08ceb5183e671ebed22a ]

There is no errno variable when NOLIBC_IGNORE_ERRNO is defined. As such,
simply print the message with "unknown error" rather than the integer
value of errno.

Fixes: acab7bcdb1bc ("tools/nolibc/stdio: add perror() to report the errno value")
Signed-off-by: Benjamin Berg 
Signed-off-by: Thomas Weißschuh 
Signed-off-by: Sasha Levin

tools bitmap: Add missing asm-generic/bitsperlong.h include

2025-11-24T09:29:49+00:00

[ Upstream commit f38ce0209ab4553906b44bd1159e35c740a84161 ]

small_const_nbits is defined in asm-generic/bitsperlong.h which
bitmap.h uses but doesn't include causing build failures in some build
systems. Add the missing #include.

Note the bitmap.h in tools has diverged from that of the kernel, so no
changes are made there.

Signed-off-by: Ian Rogers 
Acked-by: Yury Norov 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: André Almeida 
Cc: Daniel Borkmann 
Cc: Darren Hart 
Cc: David S. Miller 
Cc: Davidlohr Bueso 
Cc: Ido Schimmel 
Cc: Ingo Molnar 
Cc: Jakub Kicinski 
Cc: Jamal Hadi Salim 
Cc: Jason Xing 
Cc: Jiri Olsa 
Cc: Jonas Gottlieb 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Maurice Lambert 
Cc: Namhyung Kim 
Cc: Paolo Abeni 
Cc: Peter Zijlstra 
Cc: Petr Machata 
Cc: Rasmus Villemoes 
Cc: Thomas Gleixner 
Cc: Yuyang Huang 
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Sasha Levin

tools/nolibc: make time_t robust if __kernel_old_time_t is missing in host headers

2025-10-15T09:57:54+00:00

[ Upstream commit 0ff52df6b32a6b04a7c9dfe3d7a387aff215b482 ]

Commit d5094bcb5bfd ("tools/nolibc: define time_t in terms of
__kernel_old_time_t") made nolibc use the kernel's time type so that
`time_t` matches `timespec::tv_sec` on all ABIs (notably x32).

But since __kernel_old_time_t is fairly new, notably from 2020 in commit
94c467ddb273 ("y2038: add __kernel_old_timespec and __kernel_old_time_t"),
nolibc builds that rely on host headers may fail.

Switch to __kernel_time_t, which is the same as __kernel_old_time_t and
has existed for longer.

Tested in PPC VM of Open Source Lab of Oregon State University
(./tools/testing/selftests/rcutorture/bin/mkinitrd.sh)

Fixes: d5094bcb5bfd ("tools/nolibc: define time_t in terms of __kernel_old_time_t")
Signed-off-by: Zhouyi Zhou 
[Thomas: Reformat commit and its message a bit]
Signed-off-by: Thomas Weißschuh 
Signed-off-by: Sasha Levin

bonding: Add independent control state machine

2025-08-28T14:28:49+00:00

[ Upstream commit 240fd405528bbf7fafa0559202ca7aa524c9cd96 ]

Add support for the independent control state machine per IEEE
802.1AX-2008 5.4.15 in addition to the existing implementation of the
coupled control state machine.

Introduces two new states, AD_MUX_COLLECTING and AD_MUX_DISTRIBUTING in
the LACP MUX state machine for separated handling of an initial
Collecting state before the Collecting and Distributing state. This
enables a port to be in a state where it can receive incoming packets
while not still distributing. This is useful for reducing packet loss when
a port begins distributing before its partner is able to collect.

Added new functions such as bond_set_slave_tx_disabled_flags and
bond_set_slave_rx_enabled_flags to precisely manage the port's collecting
and distributing states. Previously, there was no dedicated method to
disable TX while keeping RX enabled, which this patch addresses.

Note that the regular flow process in the kernel's bonding driver remains
unaffected by this patch. The extension requires explicit opt-in by the
user (in order to ensure no disruptions for existing setups) via netlink
support using the new bonding parameter coupled_control. The default value
for coupled_control is set to 1 so as to preserve existing behaviour.

Signed-off-by: Aahil Awatramani
Reviewed-by: Hangbin Liu
Link: https://lore.kernel.org/r/20240202175858.1573852-1-aahila@google.com
Signed-off-by: Paolo Abeni
Stable-dep-of: 0599640a21e9 ("bonding: send LACPDUs periodically in passive mode after receiving partner's LACPDU")
Signed-off-by: Sasha Levin