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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2018-12-08 21:10:04 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2018-12-11 13:50:01 -0500
commitb61c19209c2c35ea2a2fe502d484703686eba98c (patch)
tree415cb06f3c31875a43b4eb33e166f1fb79c5402c /kernel/trace
parent1aed58e67a6ec1e7a18bfabe8ba6ec2d27c15636 (diff)
tracing: Fix memory leak in create_filter()
The create_filter() calls create_filter_start() which allocates a "parse_error" descriptor, but fails to call create_filter_finish() that frees it. The op_stack and inverts in predicate_parse() were also not freed. Found by kmemleak detector. Cc: stable@vger.kernel.org Fixes: 80765597bc587 ("tracing: Rewrite filter logic to be simpler and faster") Reviewed-by: Tom Zanussi <tom.zanussi@linux.intel.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace_events_filter.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 84a65173b1e9..5574e862de8d 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -570,11 +570,13 @@ predicate_parse(const char *str, int nr_parens, int nr_preds,
}
}
+ kfree(op_stack);
+ kfree(inverts);
return prog;
out_free:
kfree(op_stack);
- kfree(prog_stack);
kfree(inverts);
+ kfree(prog_stack);
return ERR_PTR(ret);
}
@@ -1718,6 +1720,7 @@ static int create_filter(struct trace_event_call *call,
err = process_preds(call, filter_string, *filterp, pe);
if (err && set_str)
append_filter_err(pe, *filterp);
+ create_filter_finish(pe);
return err;
}