diff mbox series

trace-cmd: Test for NULL pointer in tracecmd_tsync_free()

Message ID 20210324180044.748d8b4b@gandalf.local.home (mailing list archive)
State Accepted
Commit a83f30ead25c76f2d2ab81941860ac5065f64416
Headers show
Series trace-cmd: Test for NULL pointer in tracecmd_tsync_free() | expand

Commit Message

Steven Rostedt March 24, 2021, 10 p.m. UTC 
From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

If an error happens it is possible that tracecmd_tsync_free() gets called
with a NULL pointer, which causes a SIGSEGV crash. Prevent a crash by
testing if the tsync passed into tracecmd_tsync_free() is NULL.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 lib/trace-cmd/trace-timesync.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/lib/trace-cmd/trace-timesync.c b/lib/trace-cmd/trace-timesync.c
index 8d01c0bc..a4083f51 100644
--- a/lib/trace-cmd/trace-timesync.c
+++ b/lib/trace-cmd/trace-timesync.c
@@ -381,7 +381,7 @@  void tracecmd_tsync_free(struct tracecmd_time_sync *tsync)
 	struct clock_sync_context *tsync_context;
 	struct tsync_proto *proto;
 
-	if (!tsync->context)
+	if (!tsync || !tsync->context)
 		return;
 	tsync_context = (struct clock_sync_context *)tsync->context;