linux-kernel - Re: BUG: unable to handle kernel paging request in percpu_ref

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Message-ID: <b73690bf-a7af-4bb3-ae91-6ef2ea7f22ff@gmail.com>
Date:   Sat, 9 Jan 2021 17:04:27 +0000
From:   Pavel Begunkov <asml.silence@...il.com>
To:     syzbot <syzbot+99ed55100402022a6276@...kaller.appspotmail.com>,
        axboe@...nel.dk, io-uring@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        mingo@...nel.org, mingo@...hat.com, peterz@...radead.org,
        rostedt@...dmis.org, syzkaller-bugs@...glegroups.com,
        viro@...iv.linux.org.uk, will@...nel.org
Subject: Re: BUG: unable to handle kernel paging request in percpu_ref_exit

On 09/01/2021 17:01, syzbot wrote:
> Hello,
> 
> syzbot has tested the proposed patch and the reproducer did not trigger any issue:

#syz fix: io_uring: Fix return value from alloc_fixed_file_ref_node

> 
> Reported-and-tested-by: syzbot+99ed55100402022a6276@...kaller.appspotmail.com
> 
> Tested on:
> 
> commit:         d9d05217 io_uring: stop SQPOLL submit on creator's death
> git tree:       git://git.kernel.dk/linux-block
> kernel config:  https://syzkaller.appspot.com/x/.config?x=2455d075a1c4afa8
> dashboard link: https://syzkaller.appspot.com/bug?extid=99ed55100402022a6276
> compiler:       gcc (GCC) 10.1.0-syz 20200507
> 
> Note: testing is done by a robot and is best-effort only.
> 

-- 
Pavel Begunkov