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Fix backport of "tcp: detect malicious patterns in tcp_collapse_ofo_queue()"

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Based on review from Eric Dumazet, my backport of commit
3d4bf93ac12003f9b8e1e2de37fe27983deebdcf to older kernels was a bit
incorrect.  This patch fixes this.

Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman 2018-07-27 13:58:53 +02:00 • committed by Greg Kroah-Hartman
parent 792e682a47
commit 7a77ef209c
1 changed files with 1 additions and 0 deletions
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net/ipv4/tcp_input.c
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@ -4822,6 +4822,7 @@ static void tcp_collapse_ofo_queue(struct sock *sk)
/* Start new segment */
start = TCP_SKB_CB(skb)->seq;
end = TCP_SKB_CB(skb)->end_seq;
range_truesize = skb->truesize;
} else {
if (before(TCP_SKB_CB(skb)->seq, start))
start = TCP_SKB_CB(skb)->seq;