diff options
| author | Leo Yan <leo.yan@linaro.org> | 2021-04-20 18:15:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-28 14:40:00 +0300 |
| commit | 4d0cfb3713bc3263cd4b6d43d5fcb96c7fdaead3 (patch) | |
| tree | 99545663691e959f9801727a650889cea7dd8724 | |
| parent | ab112cc573ccde3cff7e9159d5fe21c793242b55 (diff) | |
| download | linux-4d0cfb3713bc3263cd4b6d43d5fcb96c7fdaead3.tar.xz | |
perf auxtrace: Fix potential NULL pointer dereference
[ Upstream commit b14585d9f18dc617e975815570fe836be656b1da ]
In the function auxtrace_parse_snapshot_options(), the callback pointer
"itr->parse_snapshot_options" can be NULL if it has not been set during
the AUX record initialization. This can cause tool crashing if the
callback pointer "itr->parse_snapshot_options" is dereferenced without
performing NULL check.
Add a NULL check for the pointer "itr->parse_snapshot_options" before
invoke the callback.
Fixes: d20031bb63dd6dde ("perf tools: Add AUX area tracing Snapshot Mode")
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tiezhu Yang <yangtiezhu@loongson.cn>
Link: http://lore.kernel.org/lkml/20210420151554.2031768-1-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | tools/perf/util/auxtrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index d8ada6a3c555..d3c15b53495d 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -636,7 +636,7 @@ int auxtrace_parse_snapshot_options(struct auxtrace_record *itr, break; } - if (itr) + if (itr && itr->parse_snapshot_options) return itr->parse_snapshot_options(itr, opts, str); pr_err("No AUX area tracing to snapshot\n"); |