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| author | Ravi Bangoria <ravi.bangoria@amd.com> | 2026-02-16 04:22:15 +0000 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-02-27 16:40:23 +0100 |
| commit | b0a09142622a994c4f4088c3f61db5da87cfc711 (patch) | |
| tree | 372277e1c113ed3017a9322bd74566afc04a7244 /tools/perf/scripts/python/stackcollapse.py | |
| parent | 723a290326e015b07931eabc603d3735999377be (diff) | |
perf/amd/ibs: Avoid calling perf_allow_kernel() from the IBS NMI handler
Calling perf_allow_kernel() from the NMI context is unsafe and could be
fatal. Capture the permission at event-initialization time by storing it
in event->hw.flags, and have the NMI handler rely on that cached flag
instead of making the call directly.
Fixes: 50a53b60e141d ("perf/amd/ibs: Prevent leaking sensitive data to userspace")
Reported-by: Sadasivan Shaiju <sadasivan.shaiju2@amd.com>
Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: https://patch.msgid.link/20260216042216.1440-5-ravi.bangoria@amd.com
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions