* [PATCH] trace-cmd: Test for NULL pointer in tracecmd_tsync_free()
@ 2021-03-24 22:00 Steven Rostedt
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From: Steven Rostedt @ 2021-03-24 22:00 UTC (permalink / raw)
To: Linux Trace Devel
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 --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;
--
2.25.4
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2021-03-24 22:00 [PATCH] trace-cmd: Test for NULL pointer in tracecmd_tsync_free() Steven Rostedt
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