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authorHerbert Xu <herbert@gondor.apana.org.au>2009-10-19 15:41:06 -0400
committerDavid S. Miller <davem@davemloft.net>2009-10-20 03:51:57 -0400
commitb6b39e8f3fbbb31001b836afec87bcaf4811a7bf (patch)
tree33cf8d3732bde60abc7651b0ecf78e297d7b0afb /net
parent55b8050353c4a212c94d7156e2bd5885225b869b (diff)
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: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/tcp.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 9b2756fbdf9b..90b2e0649bfb 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1442,7 +1442,9 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
1442 goto found_ok_skb; 1442 goto found_ok_skb;
1443 if (tcp_hdr(skb)->fin) 1443 if (tcp_hdr(skb)->fin)
1444 goto found_fin_ok; 1444 goto found_fin_ok;
1445 WARN_ON(!(flags & MSG_PEEK)); 1445 if (WARN_ON(!(flags & MSG_PEEK)))
1446 printk(KERN_INFO "recvmsg bug 2: copied %X "
1447 "seq %X\n", *seq, TCP_SKB_CB(skb)->seq);
1446 } 1448 }
1447 1449
1448 /* Well, if we have backlog, try to process it now yet. */ 1450 /* Well, if we have backlog, try to process it now yet. */