diff options
| author | Namhyung Kim <namhyung@kernel.org> | 2022-09-09 16:50:24 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-10-04 08:55:22 -0300 |
| commit | d031a00a29b2b2a6ad99c41fadb1ea3c0dc5046c (patch) | |
| tree | a99ab14a80ef3c1ec19c9ecd6137f043dfc1332f /tools/perf/util/sort.h | |
| parent | dc64641c8f917f20ad5cf678de3b77ebc8fb3a9a (diff) | |
perf record: Fix a segfault in record__read_lost_samples()
When it fails to open events record__open() returns without setting the
session->evlist. Then it gets a segfault in the function trying to read
lost sample counts. You can easily reproduce it as a normal user like:
$ perf record -p 1 true
...
perf: Segmentation fault
...
Skip the function if it has no evlist. And add more protection for evsels
which are not properly initialized.
Fixes: a49aa8a54e861af1 ("perf record: Read and inject LOST_SAMPLES events")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Leo Yan <leo.yan@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20220909235024.278281-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/sort.h')
0 files changed, 0 insertions, 0 deletions