diff options
| author | Eric Dumazet <edumazet@google.com> | 2012-09-17 12:51:39 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-09-18 16:26:27 -0400 |
| commit | 1d57f19539c074105791da6384a8ad674bba8037 (patch) | |
| tree | c23d0bb80809e6e01d01e7aa5642597cc8295bbe | |
| parent | 0e698bf6624c469cd4f3f391247b142963ca9c4e (diff) | |
| download | linux-stable-1d57f19539c074105791da6384a8ad674bba8037.tar.gz linux-stable-1d57f19539c074105791da6384a8ad674bba8037.tar.bz2 linux-stable-1d57f19539c074105791da6384a8ad674bba8037.zip | |
tcp: fix regression in urgent data handling
Stephan Springl found that commit 1402d366019fed "tcp: introduce
tcp_try_coalesce" introduced a regression for rlogin
It turns out problem comes from TCP urgent data handling and
a change in behavior in input path.
rlogin sends two one-byte packets with URG ptr set, and when next data
frame is coalesced, we lack sk_data_ready() calls to wakeup consumer.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Stephan Springl <springl-k@lar.bfw.de>
Cc: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/tcp_input.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 6e38c6c23caa..d377f4854cb8 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -4661,7 +4661,7 @@ queue_and_out: if (eaten > 0) kfree_skb_partial(skb, fragstolen); - else if (!sock_flag(sk, SOCK_DEAD)) + if (!sock_flag(sk, SOCK_DEAD)) sk->sk_data_ready(sk, 0); return; } @@ -5556,8 +5556,7 @@ no_ack: #endif if (eaten) kfree_skb_partial(skb, fragstolen); - else - sk->sk_data_ready(sk, 0); + sk->sk_data_ready(sk, 0); return 0; } } |