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| author |   Leo Yan <leo.yan@linaro.org> | 2021-04-20 23:15:53 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-28 13:19:15 +0200 |
| commit | aefb6ac6ac111c50ba5dfae3f015ca03b1b84d7f (patch) | |
| tree | c06c601b7038aff2cc484c3949e21adc269cc118 /tools | |
| parent | perf/x86/kvm: Fix Broadwell Xeon stepping in isolation_ucodes[] (diff) | |
| download | wireguard-linux-aefb6ac6ac111c50ba5dfae3f015ca03b1b84d7f.tar.xz wireguard-linux-aefb6ac6ac111c50ba5dfae3f015ca03b1b84d7f.zip | |
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>
Diffstat (limited to 'tools')
| -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 61b8dc45428f..ae5b97427192 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -586,7 +586,7 @@ 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"); |