Re: [syzbot] KASAN: wild-memory-access Read in io_wq_worker_running

syzbot
2023-01-09T02:34:40Z

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.