From: Hillf Danton <hdanton@sina.com>
To: syzbot <syzbot+bb2e19a1190a556c01b1@syzkaller.appspotmail.com>
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [cgroups?] INFO: task hung in cgroup_subtree_control_write (2)
Date: Mon, 15 Jun 2026 19:48:10 +0800 [thread overview]
Message-ID: <20260615114812.1820-1-hdanton@sina.com> (raw)
In-Reply-To: <6a2fb248.8812e0fc.3c3fa4.001a.GAE@google.com>
> Date: Mon, 15 Jun 2026 01:05:28 -0700
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: ec039126b7fa Add linux-next specific files for 20260611
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=178e637a580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=d0d1fa2afcbce17c
> dashboard link: https://syzkaller.appspot.com/bug?extid=bb2e19a1190a556c01b1
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10b0d4ae580000
#syz test
--- x/kernel/cgroup/cgroup.c
+++ y/kernel/cgroup/cgroup.c
@@ -3267,7 +3267,6 @@ restart:
if (!css || !css_is_dying(css))
continue;
- cgroup_get_live(dsct);
prepare_to_wait(&dsct->offline_waitq, &wait,
TASK_UNINTERRUPTIBLE);
@@ -3275,7 +3274,6 @@ restart:
schedule();
finish_wait(&dsct->offline_waitq, &wait);
- cgroup_put(dsct);
goto restart;
}
}
--
next prev parent reply other threads:[~2026-06-15 11:48 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-06 4:40 syzbot
2026-06-15 8:05 ` syzbot
2026-06-15 11:48 ` Hillf Danton [this message]
2026-06-15 15:47 ` syzbot
2026-06-15 23:28 ` Hillf Danton
2026-06-15 23:54 ` syzbot
2026-06-24 22:34 ` Tejun Heo
[not found] <b51511ac-8334-4898-a586-a5e3c5d7f69en@googlegroups.com>
2026-08-31 7:24 ` syzbot
[not found] <fa6dd7f1-5aaa-4aab-b016-3c16475cdcb0n@googlegroups.com>
2026-08-31 8:52 ` syzbot
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