linux-kernel - Re: KASAN: stack-out-of-bounds Read in rds

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Message-ID: <9deaf3c4-227f-f6f0-9ccb-3ad05fc32a0c@oracle.com>
Date:   Thu, 21 Dec 2017 08:44:32 -0800
From:   Santosh Shilimkar <santosh.shilimkar@...cle.com>
To:     syzkaller-bugs@...glegroups.com,
        Avinash Repaka <avinash.repaka@...cle.com>
Cc:     syzbot 
        <bot+9461c9b9d340854a404b46c42cbfc91ded1232d8@...kaller.appspotmail.com>,
        davem@...emloft.net, linux-kernel@...r.kernel.org,
        linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
        rds-devel@....oracle.com
Subject: Re: KASAN: stack-out-of-bounds Read in rds_sendmsg

+Avinash

On 12/21/2017 1:10 AM, syzbot wrote:
> syzkaller has found reproducer for the following crash on 

[..]

> 
> audit: type=1400 audit(1513847224.110:7): avc:  denied  { map } for  
> pid=3157 comm="syzkaller455006" path="/root/syzkaller455006870" 
> dev="sda1" ino=16481 
> scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 
> tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
> ==================================================================
> BUG: KASAN: stack-out-of-bounds in rds_rdma_bytes net/rds/send.c:1013 
> [inline]

Could you please post the discussed fix if you are ready with it ?
This new report is same as last one and cmesg length check should
address it.

Regards,
Santosh