linux-kernel - Re: [syzbot] [input?] [usb?] [io-uring?] INFO: task hung in io_wq_put_and

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Message-ID: <20250724031332.2898-1-hdanton@sina.com>
Date: Thu, 24 Jul 2025 11:13:31 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+e328767eafd849df0a78@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [input?] [usb?] [io-uring?] INFO: task hung in io_wq_put_and_exit (5)

> Date: Wed, 23 Jul 2025 07:44:28 -0700	[thread overview]
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    bf61759db409 Merge tag 'sched_ext-for-6.16-rc6-fixes' of g..
> git tree:       upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=12b877d4580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=415e83411fefd73f
> dashboard link: https://syzkaller.appspot.com/bug?extid=e328767eafd849df0a78
> compiler:       gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=110b938c580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1622a38c580000

#syz test

--- x/io_uring/io-wq.c
+++ y/io_uring/io-wq.c
@@ -954,7 +954,7 @@ static bool io_wq_worker_wake(struct io_
 {
 	__set_notify_signal(worker->task);
 	wake_up_process(worker->task);
-	return false;
+	return true;
 }
 
 static void io_run_cancel(struct io_wq_work *work, struct io_wq *wq)
--