From: Namhyung Kim <namhyung....@lge.com>
When process_op failed, @arg will be freed on a caller with type of
PRINT_OP. Thus free_arg() will try to free ->op.right field which can
have stale value if something bad happens in the middle.
Signed-off-by: Namhyung Kim <namhy...@kernel.org>
---
tools/lib/traceevent/event-parse.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/lib/traceevent/event-parse.c
b/tools/lib/traceevent/event-parse.c
index 11f76a59711f..bc4e70e3ba29 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -1772,6 +1772,7 @@ process_op(struct event_format *event, struct print_arg
*arg, char **tok)
arg->op.left = left;
arg->op.prio = 0;
+ /* it will set arg->op.right */
type = process_cond(event, arg, tok);
} else if (strcmp(token, ">>") == 0 ||
@@ -1802,6 +1803,7 @@ process_op(struct event_format *event, struct print_arg
*arg, char **tok)
arg->type = PRINT_OP;
arg->op.op = token;
arg->op.left = left;
+ arg->op.right = NULL;
if (set_op_prio(arg) == -1) {
event->flags |= EVENT_FL_FAILED;
@@ -1859,6 +1861,7 @@ process_op(struct event_format *event, struct print_arg
*arg, char **tok)
arg->op.prio = 0;
+ /* it will set arg->op.right */
type = process_array(event, arg, tok);
} else {
--
1.7.11.4
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