Re: BUG: unable to handle kernel NULL pointer dereference in rds_bind

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On 9/16/19 9:49 AM, Cong Wang wrote:
On Mon, Sep 16, 2019 at 6:29 AM syzbot
<syzbot+fae39afd2101a17ec624@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Hello,

syzbot found the following crash on:

HEAD commit:    f4b752a6 mlx4: fix spelling mistake "veify" -> "verify"
git tree:       net
console output: https://syzkaller.appspot.com/x/log.txt?x=16cbebe6600000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b89bb446a3faaba4
dashboard link: https://syzkaller.appspot.com/bug?extid=fae39afd2101a17ec624
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10753bc1600000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=111dfc11600000

The bug was bisected to:

commit b9a1e627405d68d475a3c1f35e685ccfb5bbe668
Author: Cong Wang <xiyou.wangcong@xxxxxxxxx>
Date:   Thu Jul 4 00:21:13 2019 +0000

      hsr: implement dellink to clean up resources


The crash has nothing to do with this commit. It is probably caused
by the lack of ->laddr_check in rds_loop_transport.

Will have a look.

regards,
Santosh



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