netdev - Re: [PATCH 1/9] net/rds: Check address length before reading address family

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Message-ID: <df1240dd-a471-82c1-07e7-f90ff352e2cd@oracle.com>
Date:   Fri, 12 Apr 2019 09:39:47 -0700
From:   Santosh Shilimkar <santosh.shilimkar@...cle.com>
To:     Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        syzbot <syzbot+0049bebbf3042dbd2e8f@...kaller.appspotmail.com>,
        syzbot <syzbot+915c9f99f3dbc4bd6cd1@...kaller.appspotmail.com>
Subject: Re: [PATCH 1/9] net/rds: Check address length before reading address
 family

On 4/12/2019 3:51 AM, Tetsuo Handa wrote:
> syzbot is reporting uninitialized value at rds_connect() [1] and
> rds_bind() [2]. This is because syzbot is passing ulen == 0 whereas
> these functions expect that it is safe to access sockaddr->family field
> in order to determine minimal address length for validation.
> 
> [1] https://syzkaller.appspot.com/bug?id=f4e61c010416c1e6f0fa3ffe247561b60a50ad71
> [2] https://syzkaller.appspot.com/bug?id=a4bf9e41b7e055c3823fdcd83e8c58ca7270e38f
> 
> Reported-by: syzbot <syzbot+0049bebbf3042dbd2e8f@...kaller.appspotmail.com>
> Reported-by: syzbot <syzbot+915c9f99f3dbc4bd6cd1@...kaller.appspotmail.com>
> Signed-off-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
> ---
Acked-by: Santosh Shilimkar <santosh.shilimkar@...cle.com>