netdev - Re: [PATCH net] tcp: fix slab-out-of-bounds in tcp_zerocopy

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Message-Id: <20191003.120844.699152057191482200.davem@davemloft.net>
Date:   Thu, 03 Oct 2019 12:08:44 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com, soheil@...gle.com,
        willy@...radead.org, syzkaller@...glegroups.com
Subject: Re: [PATCH net] tcp: fix slab-out-of-bounds in
 tcp_zerocopy_receive()

From: Eric Dumazet <edumazet@...gle.com>
Date: Wed,  2 Oct 2019 20:19:59 -0700

> Apparently a refactoring patch brought a bug, that was caught
> by syzbot [1]
> 
> Original code was correct, do not try to be smarter than the
> compiler :/
> 
> [1]
 ...
> Fixes: d8e18a516f8f ("net: Use skb accessors in network core")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Acked-by: Soheil Hassas Yeganeh <soheil@...gle.com>
> Cc: Matthew Wilcox (Oracle) <willy@...radead.org>
> Reported-by: syzbot <syzkaller@...glegroups.com>

Applied and queued up for -stable.