linux-kernel - Re: KASAN: use-after-free Read in rxe_query

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Message-ID: <20200309173451.GA15143@mellanox.com>
Date:   Mon, 9 Mar 2020 14:34:51 -0300
From:   Jason Gunthorpe <jgg@...lanox.com>
To:     syzbot <syzbot+e11efb687f5ab7f01f3d@...kaller.appspotmail.com>
Cc:     dledford@...hat.com, linux-kernel@...r.kernel.org,
        linux-rdma@...r.kernel.org, monis@...lanox.com,
        syzkaller-bugs@...glegroups.com, yanjunz@...lanox.com
Subject: Re: KASAN: use-after-free Read in rxe_query_port

On Sun, Mar 01, 2020 at 03:20:12AM -0800, syzbot wrote:
> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    f8788d86 Linux 5.6-rc3
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=132d3645e00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=9833e26bab355358
> dashboard link: https://syzkaller.appspot.com/bug?extid=e11efb687f5ab7f01f3d
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> 
> Unfortunately, I don't have any reproducer for this crash yet.
> 
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+e11efb687f5ab7f01f3d@...kaller.appspotmail.com

Yanjun, do you have some idea what this could be?

Thanks,
Jason