linux-kernel - Re: [syzbot] KASAN: wild-memory-access Read in io_wq_worker

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Message-ID: <000000000000e7f96f05f1cb9a84@google.com>
Date:   Sun, 08 Jan 2023 18:34:23 -0800
From:   syzbot <syzbot+d56ec896af3637bdb7e4@...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: wild-memory-access Read in io_wq_worker_running

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: { P5774 } 2664 jiffies s: 2777 root: 0x0/T
rcu: blocking rcu_node structures (internal RCU debug):

Tested on:

commit:         e6db6f93 io_uring/io-wq: only free worker if it was al..
git tree:       git://git.kernel.dk/linux.git io_uring-6.2
console output: https://syzkaller.appspot.com/x/log.txt?x=116df816480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2edd87fe5cbdf43f
dashboard link: https://syzkaller.appspot.com/bug?extid=d56ec896af3637bdb7e4
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.