tracing: Return -EINVAL if WARN_ON(!glob) triggered in event_hist_trigger_parse()

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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>

...

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Ammar Faizi 2022-04-18 01:56:29 +07:00 • committed by Steven Rostedt (Google)

parent cb1c45fb68

commit 97a5d2e5e3

1 changed files with 2 additions and 1 deletions

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kernel/trace/trace_events_hist.c

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