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Date:   Thu, 03 Nov 2016 16:20:05 -0400 (EDT)
From:   David Miller <>
Subject: Re: [PATCH net] dccp: fix out of bound access in dccp_v4_err()

From: Eric Dumazet <>
Date: Wed, 02 Nov 2016 19:00:40 -0700

> From: Eric Dumazet <>
> dccp_v4_err() does not use pskb_may_pull() and might access garbage.
> We only need 4 bytes at the beginning of the DCCP header, like TCP,
> so the 8 bytes pulled in icmp_socket_deliver() are more than enough.
> This patch might allow to process more ICMP messages, as some routers
> are still limiting the size of reflected bytes to 28 (RFC 792), instead
> of extended lengths (RFC 1812
> Signed-off-by: Eric Dumazet <>

Applied and queued up for -stable.

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