From: Hillf Danton <hdanton@sina.com>
To: syzbot <syzbot+c104904eeb2c0edbdb06@syzkaller.appspotmail.com>
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [block?] BUG: corrupted list in loop_process_work
Date: Sun, 16 Feb 2025 07:40:07 +0800 [thread overview]
Message-ID: <20250215234008.2328-1-hdanton@sina.com> (raw)
In-Reply-To: <67afa060.050a0220.21dd3.0051.GAE@google.com>
On Fri, 14 Feb 2025 11:58:24 -0800
> syzbot found the following issue on:
>
> HEAD commit: c674aa7c289e Add linux-next specific files for 20250212
> git tree: linux-next
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17e18aa4580000
#syz test
--- x/drivers/block/loop.c
+++ y/drivers/block/loop.c
@@ -1974,7 +1974,8 @@ static void loop_process_work(struct loo
*/
if (worker && !work_pending(&worker->work)) {
worker->last_ran_at = jiffies;
- list_add_tail(&worker->idle_list, &lo->idle_worker_list);
+ if (list_empty(&worker->idle_list))
+ list_add_tail(&worker->idle_list, &lo->idle_worker_list);
loop_set_timer(lo);
}
spin_unlock_irq(&lo->lo_work_lock);
--
next prev parent reply other threads:[~2025-02-15 23:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-14 19:58 syzbot
2025-02-15 23:40 ` Hillf Danton [this message]
2025-02-16 2:00 ` syzbot
2025-02-17 5:57 ` reply: " 黄朝阳 (Zhaoyang Huang)
2025-02-18 2:49 ` Zhaoyang Huang
2025-02-18 3:33 ` Ming Lei
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