diff options
| author | Ammar Faizi <ammarfaizi2@gnuweeb.org> | 2022-04-18 01:56:29 +0700 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-04-26 17:58:52 -0400 |
| commit | 97a5d2e5e35f119b6d7a37c7538773ae7af82dd5 (patch) | |
| tree | c64b9527c68254a913e5d81bfaca7310ecd86ecf /kernel/trace/trace_events_hist.c | |
| parent | cb1c45fb68b8a4285ccf750842b1136f26cfe267 (diff) | |
tracing: Return -EINVAL if WARN_ON(!glob) triggered in event_hist_trigger_parse()
If `WARN_ON(!glob)` is ever triggered, we will still continue executing
the next lines. This will trigger the more serious problem, a NULL
pointer dereference bug.
Just return -EINVAL if @glob is NULL.
Link: https://lkml.kernel.org/r/20220417185630.199062-2-ammarfaizi2@gnuweeb.org
Cc: Ingo Molnar <mingo@redhat.com>
Cc: GNU/Weeb Mailing List <gwml@vger.gnuweeb.org>
Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_events_hist.c')
| -rw-r--r-- | kernel/trace/trace_events_hist.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 998dfe2162fc..80c25be23c45 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -6214,7 +6214,8 @@ static int event_hist_trigger_parse(struct event_command *cmd_ops, lockdep_assert_held(&event_mutex); - WARN_ON(!glob); + if (WARN_ON(!glob)) + return -EINVAL; if (strlen(glob)) { hist_err_clear(); |