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Date:   Wed, 21 Dec 2022 21:52:22 -0800
In-Reply-To: <0021f079-0d7e-0c51-64ad-9d9d17652e88@kernel.dk>
Message-ID: <000000000000d3af6205f0644515@google.com>
Subject: Re: [syzbot] WARNING in io_sync_cancel
From:   syzbot <syzbot+7df055631cd1be4586fd@syzkaller.appspotmail.com>
To:     asml.silence@gmail.com, axboe@kernel.dk, io-uring@vger.kernel.org,
        linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
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Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
INFO: rcu detected stall in corrupted

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P5772 } 2680 jiffies s: 2845 root: 0x0/T
rcu: blocking rcu_node structures (internal RCU debug):


Tested on:

commit:         23fffb2f io_uring/cancel: re-grab ctx mutex after fini..
git tree:       git://git.kernel.dk/linux.git io_uring-6.2
console output: https://syzkaller.appspot.com/x/log.txt?x=15bf7bf0480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2edd87fe5cbdf43f
dashboard link: https://syzkaller.appspot.com/bug?extid=7df055631cd1be4586fd
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Note: no patches were applied.