Commit b6b39e8f authored by Herbert Xu's avatar Herbert Xu Committed by David S. Miller

tcp: Try to catch MSG_PEEK bug

This patch tries to print out more information when we hit the
MSG_PEEK bug in tcp_recvmsg.  It's been around since at least
2005 and it's about time that we finally fix it.
Signed-off-by: default avatarHerbert Xu <>
Signed-off-by: default avatarDavid S. Miller <>
parent 55b80503
......@@ -1442,7 +1442,9 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
goto found_ok_skb;
if (tcp_hdr(skb)->fin)
goto found_fin_ok;
WARN_ON(!(flags & MSG_PEEK));
if (WARN_ON(!(flags & MSG_PEEK)))
printk(KERN_INFO "recvmsg bug 2: copied %X "
"seq %X\n", *seq, TCP_SKB_CB(skb)->seq);
/* Well, if we have backlog, try to process it now yet. */
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