linux-kernel - Re: BUG: unable to handle kernel NULL pointer dereference in loop_rw

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Message-ID: <f81cc90f-1d09-4a05-1619-02d44189f03a@kernel.dk>
Date:   Mon, 10 Aug 2020 10:00:59 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     syzbot <syzbot+1abbd16e49910f6bbe45@...kaller.appspotmail.com>,
        io-uring@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        viro@...iv.linux.org.uk
Subject: Re: BUG: unable to handle kernel NULL pointer dereference in
 loop_rw_iter

On 8/10/20 9:46 AM, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    9420f1ce Merge tag 'pinctrl-v5.9-1' of git://git.kernel.or..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=13662f62900000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=72cf85e4237850c8
> dashboard link: https://syzkaller.appspot.com/bug?extid=1abbd16e49910f6bbe45
> compiler:       gcc (GCC) 10.1.0-syz 20200507
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15929006900000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15e196aa900000
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+1abbd16e49910f6bbe45@...kaller.appspotmail.com

Already fixed, just not upstream yet:

https://git.kernel.dk/cgit/linux-block/commit/?h=io_uring-5.9&id=2dd2111d0d383df104b144e0d1f6b5a00cb7cd88

-- 
Jens Axboe