This is a note to let you know that I've just added the patch titled tcp: fastopen: avoid negative sk_forward_alloc to the 4.7-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tcp-fastopen-avoid-negative-sk_forward_alloc.patch and it can be found in the queue-4.7 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Wed Sep 21 10:05:18 CEST 2016 From: Eric Dumazet <edumazet@xxxxxxxxxx> Date: Wed, 7 Sep 2016 08:34:11 -0700 Subject: tcp: fastopen: avoid negative sk_forward_alloc From: Eric Dumazet <edumazet@xxxxxxxxxx> [ Upstream commit 76061f631c2ea4ab9c4d66f3a96ecc5737f5aaf7 ] When DATA and/or FIN are carried in a SYN/ACK message or SYN message, we append an skb in socket receive queue, but we forget to call sk_forced_mem_schedule(). Effect is that the socket has a negative sk->sk_forward_alloc as long as the message is not read by the application. Josh Hunt fixed a similar issue in commit d22e15371811 ("tcp: fix tcp fin memory accounting") Fixes: 168a8f58059a ("tcp: TCP Fast Open Server - main code path") Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx> Reviewed-by: Josh Hunt <johunt@xxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/ipv4/tcp_fastopen.c | 1 + 1 file changed, 1 insertion(+) --- a/net/ipv4/tcp_fastopen.c +++ b/net/ipv4/tcp_fastopen.c @@ -150,6 +150,7 @@ void tcp_fastopen_add_skb(struct sock *s tp->segs_in = 0; tcp_segs_in(tp, skb); __skb_pull(skb, tcp_hdrlen(skb)); + sk_forced_mem_schedule(sk, skb->truesize); skb_set_owner_r(skb, sk); TCP_SKB_CB(skb)->seq++; Patches currently in stable-queue which might be from edumazet@xxxxxxxxxx are queue-4.7/bonding-fix-bonding-crash.patch queue-4.7/tcp-properly-scale-window-in-tcp_v_reqsk_send_ack.patch queue-4.7/tcp-fastopen-avoid-negative-sk_forward_alloc.patch queue-4.7/udp-fix-poll-issue-with-zero-sized-packets.patch queue-4.7/tcp-fix-use-after-free-in-tcp_xmit_retransmit_queue.patch queue-4.7/tun-fix-transmit-timestamp-support.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html