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| author | Daniel Jordan <daniel.m.jordan@oracle.com> | 2026-03-13 11:24:33 -0400 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2026-03-22 11:17:59 +0900 |
| commit | c8c4a2972f83c8b68ff03b43cecdb898939ff851 (patch) | |
| tree | cd12a5a42720f36159949a86a30ef5ed9595aa5e /tools/perf/scripts/python/stackcollapse.py | |
| parent | 7fc31dd86415fc04c71b8fd4743ad63183e8565f (diff) | |
padata: Put CPU offline callback in ONLINE section to allow failure
syzbot reported the following warning:
DEAD callback error for CPU1
WARNING: kernel/cpu.c:1463 at _cpu_down+0x759/0x1020 kernel/cpu.c:1463, CPU#0: syz.0.1960/14614
at commit 4ae12d8bd9a8 ("Merge tag 'kbuild-fixes-7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux")
which tglx traced to padata_cpu_dead() given it's the only
sub-CPUHP_TEARDOWN_CPU callback that returns an error.
Failure isn't allowed in hotplug states before CPUHP_TEARDOWN_CPU
so move the CPU offline callback to the ONLINE section where failure is
possible.
Fixes: 894c9ef9780c ("padata: validate cpumask without removed CPU during offline")
Reported-by: syzbot+123e1b70473ce213f3af@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/69af0a05.050a0220.310d8.002f.GAE@google.com/
Debugged-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions