linux-kernel - Re: [syzbot] KASAN: use-after-free Read in io_wqe

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Date:   Mon, 09 Jan 2023 10:55:21 -0800
From:   syzbot <syzbot+ad53b671c30ddaba634d@...kaller.appspotmail.com>
To:     asml.silence@...il.com, axboe@...nel.dk, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] KASAN: use-after-free Read in io_wqe_worker (2)

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: { P5550 } 2678 jiffies s: 2801 root: 0x0/T
rcu: blocking rcu_node structures (internal RCU debug):


Tested on:

commit:         a4b98579 Merge branch 'io_uring-6.2' into syztest
git tree:       git://git.kernel.dk/linux.git syztest
console output: https://syzkaller.appspot.com/x/log.txt?x=1490bc16480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8b79b14037065d92
dashboard link: https://syzkaller.appspot.com/bug?extid=ad53b671c30ddaba634d
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.