diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2020-07-10 22:11:23 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-26 10:40:48 +0200 |
| commit | 8043d5ee916885a0d6d8974a486882c6b66b3f82 (patch) | |
| tree | 5668565b31443133ab06c8329df5f8febfd483a7 /tools | |
| parent | 888d9b829c255e7bb0e1cb79cd6679f37dcb4473 (diff) | |
perf probe: Fix memory leakage when the probe point is not found
[ Upstream commit 12d572e785b15bc764e956caaa8a4c846fd15694 ]
Fix the memory leakage in debuginfo__find_trace_events() when the probe
point is not found in the debuginfo. If there is no probe point found in
the debuginfo, debuginfo__find_probes() will NOT return -ENOENT, but 0.
Thus the caller of debuginfo__find_probes() must check the tf.ntevs and
release the allocated memory for the array of struct probe_trace_event.
The current code releases the memory only if the debuginfo__find_probes()
hits an error but not checks tf.ntevs. In the result, the memory allocated
on *tevs are not released if tf.ntevs == 0.
This fixes the memory leakage by checking tf.ntevs == 0 in addition to
ret < 0.
Fixes: ff741783506c ("perf probe: Introduce debuginfo to encapsulate dwarf information")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: stable@vger.kernel.org
Link: http://lore.kernel.org/lkml/159438668346.62703.10887420400718492503.stgit@devnote2
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/probe-finder.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c index dc9d495e3d6a..849d8d2e5976 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -1362,7 +1362,7 @@ int debuginfo__find_trace_events(struct debuginfo *dbg, tf.ntevs = 0; ret = debuginfo__find_probes(dbg, &tf.pf); - if (ret < 0) { + if (ret < 0 || tf.ntevs == 0) { for (i = 0; i < tf.ntevs; i++) clear_probe_trace_event(&tf.tevs[i]); zfree(tevs); |