netdev - Re: [PATCH net] net: validate attribute sizes in neigh_dump

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Message-Id: <20180412.215016.1190154950435089625.davem@davemloft.net>
Date:   Thu, 12 Apr 2018 21:50:16 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com,
        dsa@...ulusnetworks.com
Subject: Re: [PATCH net] net: validate attribute sizes in neigh_dump_table()

From: Eric Dumazet <edumazet@...gle.com>
Date: Wed, 11 Apr 2018 14:46:00 -0700

> Since neigh_dump_table() calls nlmsg_parse() without giving policy
> constraints, attributes can have arbirary size that we must validate
> 
> Reported by syzbot/KMSAN :
 ...
> Fixes: 21fdd092acc7 ("net: Add support for filtering neigh dump by master device")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: David Ahern <dsa@...ulusnetworks.com>
> Reported-by: syzbot <syzkaller@...glegroups.com>

Applied and queued up for -stable.