linux-stable.git/tools, branch v6.18.32

x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache

2026-05-14T13:30:26+00:00

commit c21b90f77687075115d989e53a8ec5e2bb427ab1 upstream.

Make sure resources are not improperly shared in the op cache and
cause instruction corruption this way.

Signed-off-by: Prathyushi Nangia 
Co-developed-by: Borislav Petkov (AMD) 
Signed-off-by: Borislav Petkov (AMD) 
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

selftests: mptcp: pm: restrict 'unknown' check to pm_nl_ctl

2026-05-14T13:30:22+00:00

commit 53705ddfa18408f8e1f064331b6387509fa19f7f upstream.

When pm_netlink.sh is executed with '-i', 'ip mptcp' is used instead of
'pm_nl_ctl'. IPRoute2 doesn't support the 'unknown' flag, which has only
been added to 'pm_nl_ctl' for this specific check: to ensure that the
kernel ignores such unsupported flag.

No reason to add this flag to 'ip mptcp'. Then, this check should be
skipped when 'ip mptcp' is used.

Fixes: 0cef6fcac24d ("selftests: mptcp: ip_mptcp option for more scripts")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau 
Signed-off-by: Matthieu Baerts (NGI0) 
Link: https://patch.msgid.link/20260505-net-mptcp-pm-fixes-7-1-rc3-v1-11-fca8091060a4@kernel.org
Signed-off-by: Jakub Kicinski 
Signed-off-by: Greg Kroah-Hartman

selftests: mptcp: check output: catch cmd errors

2026-05-14T13:30:22+00:00

commit 65db7b27b90e2ea8d4966935aa9a50b6a60c31ac upstream.

Using '${?}' inside the if-statement to check the returned value from
the command that was evaluated as part of the if-statement is not
correct: here, '${?}' will be linked to the previous instruction, not
the one that is expected here (${cmd}).

Instead, simply mark the error, except if an error is expected. If
that's the case, 1 can be passed as the 4th argument of this helper.
Three checks from pm_netlink.sh expect an error.

While at it, improve the error message when the command unexpectedly
fails or succeeds.

Note that we could expect a specific returned value, but the checks
currently expecting an error can be used with 'ip mptcp' or 'pm_nl_ctl',
and these two tools don't return the same error code.

Fixes: 2d0c1d27ea4e ("selftests: mptcp: add mptcp_lib_check_output helper")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau 
Signed-off-by: Matthieu Baerts (NGI0) 
Link: https://patch.msgid.link/20260505-net-mptcp-pm-fixes-7-1-rc3-v1-10-fca8091060a4@kernel.org
Signed-off-by: Jakub Kicinski 
Signed-off-by: Greg Kroah-Hartman

mm: prevent droppable mappings from being locked

2026-05-07T04:11:59+00:00

[ Upstream commit d239462787b072c78eb19fc1f155c3d411256282 ]

Droppable mappings must not be lockable.  There is a check for VMAs with
VM_DROPPABLE set in mlock_fixup() along with checks for other types of
unlockable VMAs which ensures this when calling mlock()/mlock2().

For mlockall(MCL_FUTURE), the check for unlockable VMAs is different.  In
apply_mlockall_flags(), if the flags parameter has MCL_FUTURE set, the
current task's mm's default VMA flag field mm->def_flags has VM_LOCKED
applied to it.  VM_LOCKONFAULT is also applied if MCL_ONFAULT is also set.
When these flags are set as default in this manner they are cleared in
__mmap_complete() for new mappings that do not support mlock.  A check for
VM_DROPPABLE in __mmap_complete() is missing resulting in droppable
mappings created with VM_LOCKED set.  To fix this and reduce that chance
of similar bugs in the future, introduce and use vma_supports_mlock().

Link: https://lkml.kernel.org/r/20260310155821.17869-1-anthony.yznaga@oracle.com
Fixes: 9651fcedf7b9 ("mm: add MAP_DROPPABLE for designating always lazily freeable mappings")
Signed-off-by: Anthony Yznaga 
Suggested-by: David Hildenbrand 
Acked-by: David Hildenbrand (Arm) 
Reviewed-by: Pedro Falcato 
Reviewed-by: Lorenzo Stoakes (Oracle) 
Tested-by: Lorenzo Stoakes (Oracle) 
Cc: Jann Horn 
Cc: Jason A. Donenfeld 
Cc: Liam Howlett 
Cc: Michal Hocko 
Cc: Mike Rapoport 
Cc: Shuah Khan 
Cc: Suren Baghdasaryan 
Cc: Vlastimil Babka 
Cc: 
Signed-off-by: Andrew Morton 
[ added const to is_vm_hugetlb_page and stubbed vma_supports_mlock in vma_internal.h instead of the split-out stubs.h ]
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

ktest: Fix the month in the name of the failure directory

2026-05-07T04:11:58+00:00

commit 768059ede35f197575a38b10797b52402d9d4d2f upstream.

The Perl localtime() function returns the month starting at 0 not 1. This
caused the date produced to create the directory for saving files of a
failed run to have the month off by one.

  machine-test-useconfig-fail-20260314073628

The above happened in April, not March. The correct name should have been:

  machine-test-useconfig-fail-20260414073628

This was somewhat confusing.

Cc: stable@vger.kernel.org
Cc: John 'Warthog9' Hawley 
Link: https://patch.msgid.link/20260420142426.33ad0293@fedora
Fixes: 7faafbd69639b ("ktest: Add open and close console and start stop monitor")
Signed-off-by: Steven Rostedt 
Signed-off-by: Greg Kroah-Hartman

perf annotate: Use jump__delete when freeing LoongArch jumps

2026-05-07T04:11:53+00:00

[ Upstream commit a355eefc36c4481188249b067832b40a2c45fa5c ]

Currently, the initialization of loongarch_jump_ops does not contain an
assignment to its .free field. This causes disasm_line__free() to fall
through to ins_ops__delete() for LoongArch jump instructions.

ins_ops__delete() will free ins_operands.source.raw and
ins_operands.source.name, and these fields overlaps with
ins_operands.jump.raw_comment and ins_operands.jump.raw_func_start.
Since in loongarch_jump__parse(), these two fields are populated by
strchr()-ing the same buffer, trying to free them will lead to undefined
behavior.

This invalid free usually leads to crashes:

        Process 1712902 (perf) of user 1000 dumped core.
        Stack trace of thread 1712902:
        #0  0x00007fffef155c58 n/a (libc.so.6 + 0x95c58)
        #1  0x00007fffef0f7a94 raise (libc.so.6 + 0x37a94)
        #2  0x00007fffef0dd6a8 abort (libc.so.6 + 0x1d6a8)
        #3  0x00007fffef145490 n/a (libc.so.6 + 0x85490)
        #4  0x00007fffef1646f4 n/a (libc.so.6 + 0xa46f4)
        #5  0x00007fffef164718 n/a (libc.so.6 + 0xa4718)
        #6  0x00005555583a6764 __zfree (/home/csmantle/dist/linux-arch/tools/perf/perf + 0x106764)
        #7  0x000055555854fb70 disasm_line__free (/home/csmantle/dist/linux-arch/tools/perf/perf + 0x2afb70)
        #8  0x000055555853d618 annotated_source__purge (/home/csmantle/dist/linux-arch/tools/perf/perf + 0x29d618)
        #9  0x000055555852300c __hist_entry__tui_annotate (/home/csmantle/dist/linux-arch/tools/perf/perf + 0x28300c)
        #10 0x0000555558526718 do_annotate (/home/csmantle/dist/linux-arch/tools/perf/perf + 0x286718)
        #11 0x000055555852ed94 evsel__hists_browse (/home/csmantle/dist/linux-arch/tools/perf/perf + 0x28ed94)
        #12 0x000055555831fdd0 cmd_report (/home/csmantle/dist/linux-arch/tools/perf/perf + 0x7fdd0)
        #13 0x000055555839b644 handle_internal_command (/home/csmantle/dist/linux-arch/tools/perf/perf + 0xfb644)
        #14 0x00005555582fe6ac main (/home/csmantle/dist/linux-arch/tools/perf/perf + 0x5e6ac)
        #15 0x00007fffef0ddd90 n/a (libc.so.6 + 0x1dd90)
        #16 0x00007fffef0ddf0c __libc_start_main (libc.so.6 + 0x1df0c)
        #17 0x00005555582fed10 _start (/home/csmantle/dist/linux-arch/tools/perf/perf + 0x5ed10)
        ELF object binary architecture: LoongArch

... and it can be confirmed with Valgrind:

        ==1721834== Invalid free() / delete / delete[] / realloc()
        ==1721834==    at 0x4EA9014: free (in /usr/lib/valgrind/vgpreload_memcheck-loongarch64-linux.so)
        ==1721834==    by 0x4106287: __zfree (zalloc.c:13)
        ==1721834==    by 0x42ADC8F: disasm_line__free (in /home/csmantle/dist/linux-arch/tools/perf/perf)
        ==1721834==    by 0x429B737: annotated_source__purge (in /home/csmantle/dist/linux-arch/tools/perf/perf)
        ==1721834==    by 0x42811EB: __hist_entry__tui_annotate (in /home/csmantle/dist/linux-arch/tools/perf/perf)
        ==1721834==    by 0x42848D7: do_annotate (in /home/csmantle/dist/linux-arch/tools/perf/perf)
        ==1721834==    by 0x428CF33: evsel__hists_browse (in /home/csmantle/dist/linux-arch/tools/perf/perf)
        ==1721834==  Address 0x7d34303 is 35 bytes inside a block of size 62 alloc'd
        ==1721834==    at 0x4EA59B8: malloc (in /usr/lib/valgrind/vgpreload_memcheck-loongarch64-linux.so)
        ==1721834==    by 0x6B80B6F: strdup (strdup.c:42)
        ==1721834==    by 0x42AD917: disasm_line__new (in /home/csmantle/dist/linux-arch/tools/perf/perf)
        ==1721834==    by 0x42AE5A3: symbol__disassemble_objdump (in /home/csmantle/dist/linux-arch/tools/perf/perf)
        ==1721834==    by 0x42AF0A7: symbol__disassemble (in /home/csmantle/dist/linux-arch/tools/perf/perf)
        ==1721834==    by 0x429B3CF: symbol__annotate (in /home/csmantle/dist/linux-arch/tools/perf/perf)
        ==1721834==    by 0x429C233: symbol__annotate2 (in /home/csmantle/dist/linux-arch/tools/perf/perf)
        ==1721834==    by 0x42804D3: __hist_entry__tui_annotate (in /home/csmantle/dist/linux-arch/tools/perf/perf)
        ==1721834==    by 0x42848D7: do_annotate (in /home/csmantle/dist/linux-arch/tools/perf/perf)
        ==1721834==    by 0x428CF33: evsel__hists_browse (in /home/csmantle/dist/linux-arch/tools/perf/perf)

This patch adds the missing free() specialization in loongarch_jump_ops,
which prevents disasm_line__free() from invoking the default cleanup
function.

Fixes: fb7fd2a14a503b9a ("perf annotate: Move raw_comment and raw_func_start fields out of 'struct ins_operands'")
Cc: stable@vger.kernel.org
Cc: WANG Rui 
Cc: Huacai Chen 
Cc: WANG Xuerui 
Cc: loongarch@lists.linux.dev
Signed-off-by: Rong Bao 
Tested-by: WANG Rui 
Signed-off-by: Namhyung Kim 
Signed-off-by: Sasha Levin

tools/accounting: handle truncated taskstats netlink messages

2026-05-07T04:11:44+00:00

commit cc82b3dcc6a8fa259fbda12ab00d6fc00908a49e upstream.

procacct and getdelays use a fixed receive buffer for taskstats generic
netlink messages.  A multi-threaded process exit can emit a single
PID+TGID notification large enough to exceed that buffer on newer kernels.

Switch to recvmsg() so MSG_TRUNC is detected explicitly, increase the
message buffer size, and report truncated datagrams clearly instead of
misparsing them as fatal netlink errors.

Also print the taskstats version in debug output to make version
mismatches easier to diagnose while inspecting taskstats traffic.

Link: https://lkml.kernel.org/r/520308bb4cbbaf8dc2c7296b5f60f11e12fb30a5.1774810498.git.cyyzero16@gmail.com
Signed-off-by: Yiyang Chen 
Cc: Balbir Singh 
Cc: Dr. Thomas Orgis 
Cc: Fan Yu 
Cc: Wang Yaxin 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

selftests/landlock: Skip stale records in audit_match_record()

2026-05-07T04:11:41+00:00

commit 07c2572a87573b2a2f0fd6b9f538cd1aeef2eee7 upstream.

Domain deallocation records are emitted asynchronously from kworker
threads (via free_ruleset_work()).  Stale deallocation records from a
previous test can arrive during the current test's deallocation read
loop and be picked up by audit_match_record() instead of the expected
record, causing a domain ID mismatch.  The audit.layers test (which
creates 16 nested domains) is particularly vulnerable because it reads
16 deallocation records in sequence, providing a large window for stale
records to interleave.

The same issue affects audit_flags.signal, where deallocation records
from a previous test (audit.layers) can leak into the next test and be
picked up by audit_match_record() instead of the expected record.

Fix this by continuing to read records when the type matches but the
content pattern does not.  Stale records are silently consumed, and the
loop only stops when both type and pattern match (or the socket times
out with -EAGAIN).

Additionally, extend matches_log_domain_deallocated() with an
expected_domain_id parameter.  When set, the regex pattern includes the
specific domain ID as a literal hex value, so that deallocation records
for a different domain do not match the pattern at all.  This handles
the case where the stale record has the same denial count as the
expected one (e.g. both have denials=1), which the type+pattern loop
alone cannot distinguish.  Callers that already know the expected domain
ID (from a prior denial or allocation record) now pass it to filter
precisely.

When expected_domain_id is set, matches_log_domain_deallocated() also
temporarily increases the socket timeout to audit_tv_dom_drop (1 second)
to wait for the asynchronous kworker deallocation, and restores
audit_tv_default afterward.  This removes the need for callers to manage
the timeout switch manually.

Cc: Günther Noack 
Cc: stable@vger.kernel.org
Fixes: 6a500b22971c ("selftests/landlock: Add tests for audit flags and domain IDs")
Link: https://lore.kernel.org/r/20260402192608.1458252-5-mic@digikod.net
Signed-off-by: Mickaël Salaün 
Signed-off-by: Greg Kroah-Hartman

selftests/landlock: Fix snprintf truncation checks in audit helpers

2026-05-07T04:11:41+00:00

commit b566f7a4f0e4f15f78f2e5fac273fa954991e03a upstream.

snprintf() returns the number of characters that would have been
written, excluding the terminating NUL byte.  When the output is
truncated, this return value equals or exceeds the buffer size.  Fix
matches_log_domain_allocated() and matches_log_domain_deallocated() to
detect truncation with ">=" instead of ">".

Cc: Günther Noack 
Cc: stable@vger.kernel.org
Fixes: 6a500b22971c ("selftests/landlock: Add tests for audit flags and domain IDs")
Reviewed-by: Günther Noack 
Link: https://lore.kernel.org/r/20260402192608.1458252-2-mic@digikod.net
Signed-off-by: Mickaël Salaün 
Signed-off-by: Greg Kroah-Hartman

selftests/landlock: Fix format warning for __u64 in net_test

2026-05-07T04:11:41+00:00

commit a060ac0b8c3345639f5f4a01e2c435d34adf7e3d upstream.

On architectures where __u64 is unsigned long (e.g. powerpc64), using
%llx to format a __u64 triggers a -Wformat warning because %llx expects
unsigned long long.  Cast the argument to unsigned long long.

Cc: Günther Noack 
Cc: stable@vger.kernel.org
Fixes: a549d055a22e ("selftests/landlock: Add network tests")
Reported-by: kernel test robot 
Closes: https://lore.kernel.org/r/202604020206.62zgOTeP-lkp@intel.com/
Reviewed-by: Günther Noack 
Link: https://lore.kernel.org/r/20260402192608.1458252-6-mic@digikod.net
Signed-off-by: Mickaël Salaün 
Signed-off-by: Greg Kroah-Hartman