path: root/tools
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authorNamhyung Kim <namhyung.kim@lge.com>2012-05-23 11:36:49 +0900
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-05-24 11:33:34 -0300
commitd1de10870909a27ce2ac380d0671feb308826491 (patch)
tree4640ef6e16c2013edff652193d6d531a7067e600 /tools
parenttools lib traceevent: Fix a possible memory leak (diff)
tools lib traceevent: Fix a possibly wrong memory dereference
If set_op_prio() failed, the token will be freed at out_free, then arg->op.op would turn out to be a dangle pointer. After returning EVENT_ERROR from process_op(), free_arg() will be called and then it will finally see the dangling pointer. Cc: Borislav Petkov <bp@alien8.de> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1337740619-27925-13-git-send-email-namhyung.kim@lge.com Signed-off-by: Namhyung Kim <namhyung.kim@lge.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index d598b376e3c1..445a43ad42fd 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -1715,6 +1715,8 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
if (set_op_prio(arg) == -1) {
event->flags |= EVENT_FL_FAILED;
+ /* arg->op.op (= token) will be freed at out_free */
+ arg->op.op = NULL;
goto out_free;