Re: netfilter: active obj WARN when cleaning up
From: Pablo Neira Ayuso
Date: Tue Nov 26 2013 - 18:07:24 EST
On Tue, Nov 26, 2013 at 02:11:57PM -0500, Sasha Levin wrote:
> Ping? I still see this warning.
Did your test include patch 0c3c6c00c6?
> On 09/07/2013 09:10 AM, Sasha Levin wrote:
> >Hi all,
> >
> >While fuzzing with trinity inside a KVM tools guest, running latest -next kernel, I've
> >stumbled on the following:
> >
> >[ 418.311956] ------------[ cut here ]------------
> >[ 418.312449] WARNING: CPU: 6 PID: 4178 at lib/debugobjects.c:260 debug_print_object+0x8d/0xb0()
> >[ 418.313243] ODEBUG: free active (active state 0) object type: timer_list hint:
> >delayed_work_timer_fn+0x0/0x20
> >[ 418.314038] Modules linked in:
> >[ 418.314038] CPU: 6 PID: 4178 Comm: kworker/u16:2 Tainted: G W 3.11.0-next-20130906-sasha
> >#3984
> >[ 418.314038] Workqueue: netns cleanup_net
> >[ 418.314038] 0000000000000104 ffff880410371a58 ffffffff841b7815 0000000000000104
> >[ 418.314038] ffff880410371aa8 ffff880410371a98 ffffffff8112540c ffff880410371a78
> >[ 418.314038] ffffffff853ea0ab ffff8800bdc68b80 ffffffff85a65c00 ffffffff87676658
> >[ 418.314038] Call Trace:
> >[ 418.314038] [<ffffffff841b7815>] dump_stack+0x52/0x87
> >[ 418.320315] [<ffffffff8112540c>] warn_slowpath_common+0x8c/0xc0
> >[ 418.321040] [<ffffffff811254f6>] warn_slowpath_fmt+0x46/0x50
> >[ 418.321101] [<ffffffff81a60ded>] debug_print_object+0x8d/0xb0
> >[ 418.321101] [<ffffffff811444e0>] ? __queue_work+0x390/0x390
> >[ 418.321101] [<ffffffff81a61605>] __debug_check_no_obj_freed+0xa5/0x220
> >[ 418.321101] [<ffffffff81249e76>] ? kmem_cache_destroy+0x86/0xe0
> >[ 418.321101] [<ffffffff81a61795>] debug_check_no_obj_freed+0x15/0x20
> >[ 418.321101] [<ffffffff812874d7>] kmem_cache_free+0x197/0x340
> >[ 418.321101] [<ffffffff81249e76>] kmem_cache_destroy+0x86/0xe0
> >[ 418.321101] [<ffffffff83d5d681>] nf_conntrack_cleanup_net_list+0x131/0x170
> >[ 418.321101] [<ffffffff83d5ec5d>] nf_conntrack_pernet_exit+0x5d/0x70
> >[ 418.321101] [<ffffffff83cda1ce>] ops_exit_list+0x5e/0x70
> >[ 418.321101] [<ffffffff83cda80b>] cleanup_net+0xfb/0x1c0
> >[ 418.321101] [<ffffffff81145c28>] process_one_work+0x338/0x550
> >[ 418.321101] [<ffffffff81145b50>] ? process_one_work+0x260/0x550
> >[ 418.321883] [<ffffffff81147605>] worker_thread+0x215/0x350
> >[ 418.321883] [<ffffffff811473f0>] ? manage_workers+0x180/0x180
> >[ 418.321883] [<ffffffff81150887>] kthread+0xe7/0xf0
> >[ 418.321883] [<ffffffff811507a0>] ? __init_kthread_worker+0x70/0x70
> >[ 418.321883] [<ffffffff841c7a2c>] ret_from_fork+0x7c/0xb0
> >[ 418.321883] [<ffffffff811507a0>] ? __init_kthread_worker+0x70/0x70
> >[ 418.321883] ---[ end trace c974221542b61d0d ]---
> >
> >
> >Thanks,
> >Sasha
>
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