Messages in this thread | | | Date | Sun, 25 Sep 2022 09:12:37 +0800 | From | Leo Yan <> | Subject | Re: [PATCH] perf record: Fix segmentation fault in record__read_lost_samples() |
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Hi Namhyung,
On Sat, Sep 24, 2022 at 09:52:09AM -0700, Namhyung Kim wrote:
[...]
> > In the unprivileged mode perf fails to open PMU event, the function > > record__open() returns error and "session->evlist" is NULL; this leads > > to segmentation fault when iterates "session->evlist" in the function > > record__read_lost_samples(). > > > > This patch checks "session->evlist" in record__read_lost_samples(), if > > "session->evlist" is NULL then the function directly bails out to avoid > > segmentation fault. > > > > Fixes: a49aa8a54e86 ("perf record: Read and inject LOST_SAMPLES events") > > Signed-off-by: Leo Yan <leo.yan@linaro.org> > > Thanks for the fix and sorry for the inconvenience. > Actually I sent the same fix a few weeks ago. > > https://lore.kernel.org/r/20220909235024.278281-1-namhyung@kernel.org
Thanks a lot for the info and fix. The patch in above link looks good to me! Please ignore this one.
Leo
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