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| author | Masami Hiramatsu (Google) <[email protected]> | 2025-07-28 23:47:03 +0000 |
|---|---|---|
| committer | Masami Hiramatsu (Google) <[email protected]> | 2025-07-29 07:19:05 +0000 |
| commit | a3e892ab0fc287389176eabdcd74234508f6e52d (patch) | |
| tree | f6a11fcfea658efb3ce372ad548761d6f4452e78 /drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c | |
| parent | Linux 6.16 (diff) | |
| download | kernel-a3e892ab0fc287389176eabdcd74234508f6e52d.tar.gz kernel-a3e892ab0fc287389176eabdcd74234508f6e52d.zip | |
tracing: fprobe: Fix infinite recursion using preempt_*_notrace()
Since preempt_count_add/del() are tracable functions, it is not allowed
to use preempt_disable/enable() in ftrace handlers. Without this fix,
probing on `preempt_count_add%return` will cause an infinite recursion
of fprobes.
To fix this problem, use preempt_disable/enable_notrace() in
fprobe_return().
Link: https://lore.kernel.org/all/175374642359.1471729.1054175011228386560.stgit@mhiramat.tok.corp.google.com/
Fixes: 4346ba160409 ("fprobe: Rewrite fprobe on function-graph tracer")
Cc: [email protected]
Signed-off-by: Masami Hiramatsu (Google) <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c')
0 files changed, 0 insertions, 0 deletions