netdev - Re: [PATCH net] rds: do not leak kernel memory to user land

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Message-Id: <20180503.112650.2294706854339589223.davem@davemloft.net>
Date:   Thu, 03 May 2018 11:26:50 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com,
        santosh.shilimkar@...cle.com, linux-rdma@...r.kernel.org
Subject: Re: [PATCH net] rds: do not leak kernel memory to user land

From: Eric Dumazet <edumazet@...gle.com>
Date: Wed,  2 May 2018 14:53:39 -0700

> syzbot/KMSAN reported an uninit-value in put_cmsg(), originating
> from rds_cmsg_recv().
> 
> Simply clear the structure, since we have holes there, or since
> rx_traces might be smaller than RDS_MSG_RX_DGRAM_TRACE_MAX.
 ...
> Fixes: 3289025aedc0 ("RDS: add receive message trace used by application")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Reported-by: syzbot <syzkaller@...glegroups.com>

Applied and queued up for -stable.