diff options
| author | Tejun Heo <tj@kernel.org> | 2013-01-23 09:31:01 -0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2013-01-23 09:31:01 -0800 |
| commit | c14afb82ffff5903a701a9fb737ac20f36d1f755 (patch) | |
| tree | 304dcc7b1d7b9a5f564f7e978228e61ef41fbef2 /net/ipv4/tcp_input.c | |
| parent | 0fdff3ec6d87856cdcc99e69cf42143fdd6c56b4 (diff) | |
| parent | 1d8549085377674224bf30a368284c391a3ce40e (diff) | |
Merge branch 'master' into for-3.9-async
To receive f56c3196f251012de9b3ebaff55732a9074fdaae ("async: fix
__lowest_in_progress()").
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index a13692560e63..18f97ca76b00 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -5543,6 +5543,9 @@ slow_path: if (len < (th->doff << 2) || tcp_checksum_complete_user(sk, skb)) goto csum_error; + if (!th->ack && !th->rst) + goto discard; + /* * Standard slow path. */ @@ -5551,7 +5554,7 @@ slow_path: return 0; step5: - if (th->ack && tcp_ack(sk, skb, FLAG_SLOWPATH) < 0) + if (tcp_ack(sk, skb, FLAG_SLOWPATH) < 0) goto discard; /* ts_recent update must be made after we are sure that the packet @@ -5984,11 +5987,15 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb, if (tcp_check_req(sk, skb, req, NULL, true) == NULL) goto discard; } + + if (!th->ack && !th->rst) + goto discard; + if (!tcp_validate_incoming(sk, skb, th, 0)) return 0; /* step 5: check the ACK field */ - if (th->ack) { + if (true) { int acceptable = tcp_ack(sk, skb, FLAG_SLOWPATH) > 0; switch (sk->sk_state) { @@ -6138,8 +6145,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb, } break; } - } else - goto discard; + } /* ts_recent update must be made after we are sure that the packet * is in window. |