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Message-Id: <20240205050144.652-1-hdanton@sina.com>
Date: Mon, 5 Feb 2024 13:01:44 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+6b1634ec78e55df41793@...kaller.appspotmail.com>
Cc: Tejun Heo <tj@...nel.org>,
linux-kernel@...r.kernel.org,
syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [afs?] [net?] INFO: task hung in rxrpc_release (3)
On Sat, 03 Feb 2024 07:38:34 -0800
> HEAD commit: 076d56d74f17 Add linux-next specific files for 20240202
> git tree: linux-next
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1562f5b0180000
Test tj's fix [1].
[1] https://lore.kernel.org/lkml/Zb_-LQLY7eRuakfe@slm.duckdns.org/
#syz test
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1999,6 +1999,8 @@ static int try_to_grab_pending(struct wo
*/
pwq = get_work_pwq(work);
if (pwq && pwq->pool == pool) {
+ unsigned long work_data;
+
debug_work_deactivate(work);
/*
@@ -2016,11 +2018,12 @@ static int try_to_grab_pending(struct wo
list_del_init(&work->entry);
+ work_data = *work_data_bits(work);
/* work->data points to pwq iff queued, point to pool */
set_work_pool_and_keep_pending(work, pool->id);
/* must be the last step, see the function comment */
- pwq_dec_nr_in_flight(pwq, *work_data_bits(work));
+ pwq_dec_nr_in_flight(pwq, work_data);
raw_spin_unlock(&pool->lock);
rcu_read_unlock();
--
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