tracing: Fix memory leak in set_trigger_filter()

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commit 3cec638b3d upstream.

When create_event_filter() fails in set_trigger_filter(), the filter may
still be allocated and needs to be freed. The caller expects the
data->filter to be updated with the new filter, even if the new filter
failed (we could add an error message by setting set_str parameter of
create_event_filter(), but that's another update).

But because the error would just exit, filter was left hanging and
nothing could free it.

Found by kmemleak detector.

Fixes: bac5fb97a1 ("tracing: Add and use generic set_trigger_filter() implementation")
Reviewed-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Steven Rostedt (VMware) 2018-12-09 21:17:30 -05:00 • committed by Ben Hutchings

parent ce20cd87c5

commit dc7c8020cc

1 changed files with 4 additions and 2 deletions

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kernel/trace/trace_events_trigger.c

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