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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2009-10-19 19:41:06 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-10-20 00:51:57 -0700 |
| commit | b6b39e8f3fbbb31001b836afec87bcaf4811a7bf (patch) | |
| tree | 33cf8d3732bde60abc7651b0ecf78e297d7b0afb /net | |
| parent | 55b8050353c4a212c94d7156e2bd5885225b869b (diff) | |
| download | linux-3.10-b6b39e8f3fbbb31001b836afec87bcaf4811a7bf.tar.gz linux-3.10-b6b39e8f3fbbb31001b836afec87bcaf4811a7bf.tar.bz2 linux-3.10-b6b39e8f3fbbb31001b836afec87bcaf4811a7bf.zip | |
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.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 9b2756fbdf9..90b2e0649bf 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, 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. */ |