tracing: Avoid memory leak in predicate_parse()

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In case of errors, predicate_parse() goes to the out_free label
to free memory and to return an error code.

However, predicate_parse() does not free the predicates of the
temporary prog_stack array, thence leaking them.

Link: http://lkml.kernel.org/r/20190528154338.29976-1-tomasbortoli@gmail.com

Cc: stable@vger.kernel.org
Fixes: 80765597bc ("tracing: Rewrite filter logic to be simpler and faster")
Reported-by: syzbot+6b8e0fb820e570c59e19@syzkaller.appspotmail.com
Signed-off-by: Tomas Bortoli <tomasbortoli@gmail.com>
[ Added protection around freeing prog_stack[i].pred ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

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Tomas Bortoli 2019-05-28 17:43:38 +02:00 • committed by Steven Rostedt (VMware)

parent 0c97bf863e

commit dfb4a6f219

1 changed files with 6 additions and 2 deletions

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kernel/trace/trace_events_filter.c

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