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-rw-r--r--net/tipc/port.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/tipc/port.c b/net/tipc/port.c
index 3946b5b10c7..756e64cbff9 100644
--- a/net/tipc/port.c
+++ b/net/tipc/port.c
@@ -367,6 +367,12 @@ int tipc_reject_msg(struct sk_buff *buf, u32 err)
imp++;
/* discard rejected message if it shouldn't be returned to sender */
+
+ if (WARN(!msg_isdata(msg),
+ "attempt to reject message with user=%u", msg_user(msg))) {
+ dump_stack();
+ goto exit;
+ }
if (msg_errcode(msg) || msg_dest_droppable(msg))
goto exit;