WARNING in __queue

WARNING in __queue_work (3)
Status: upstream: reported on 2020/08/04 00:36
Reported-by: syzbot+63bed493aebbf6872647@syzkaller.appspotmail.com
First crash: 60d, last: 4d11h

similar bugs (3):
Kernel	Title	Repro	Count	Last	Reported	Patched	Status
upstream	WARNING in __queue_work	C	1	955d	955d	4/17	fixed on 2018/02/26 20:04
upstream	WARNING in __queue_work (2)		1	133d	129d	0/17	auto-closed as invalid on 2020/07/17 09:16
linux-4.19	WARNING in __queue_work		1	19d	19d	0/1	upstream: reported on 2020/09/10 01:47

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 1 PID: 10594 at kernel/workqueue.c:1413 __queue_work+0xb8a/0xf60 kernel/workqueue.c:1413
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 10594 Comm: kworker/u16:5 Not tainted 5.9.0-rc6-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: netns cleanup_net
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x198/0x1fd lib/dump_stack.c:118
 panic+0x382/0x7fb kernel/panic.c:231
 __warn.cold+0x20/0x4b kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:__queue_work+0xb8a/0xf60 kernel/workqueue.c:1413
Code: e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 ee b6 69 00 8b 5b 24 31 ff 83 e3 20 89 de e8 df df 28 00 85 db 75 7c e8 76 e3 28 00 <0f> 0b e9 b5 fa ff ff e8 6a e3 28 00 0f 0b e9 2e fa ff ff e8 5e e3
RSP: 0000:ffffc900004e8ca0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000100 RCX: ffffffff814d5a71
RDX: ffff888054b34140 RSI: ffffffff814d5aca RDI: 0000000000000005
RBP: 0000000000000100 R08: 0000000000000000 R09: ffffffff8d63bf83
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801d4f6130
R13: 0000000000000000 R14: ffff888029073000 R15: 0000000000000040
 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413
 expire_timers kernel/time/timer.c:1453 [inline]
 __run_timers.part.0+0x4a6/0xaa0 kernel/time/timer.c:1755
 __run_timers kernel/time/timer.c:1736 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1768
 __do_softirq+0x1f8/0xb23 kernel/softirq.c:298
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x235/0x280 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:rollback_registered_many+0x0/0x1250 net/core/dev.c:9234
Code: 89 e6 48 c7 c7 a0 de 13 8b e8 9c 39 6c fd e9 76 f7 ff ff 4c 89 e6 48 c7 c7 e0 de 13 8b e8 88 39 6c fd e9 1c f7 ff ff 0f 1f 00 <41> 57 41 56 41 55 41 54 55 53 48 81 ec d0 00 00 00 48 8d 44 24 50
RSP: 0000:ffffc90000e07b10 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffffc90000e07be8
RDX: ffff888054b34140 RSI: ffffffff866a41d2 RDI: ffffc90000e07ba8
RBP: ffffc90000e07ba8 R08: 0000000000000000 R09: ffffffff8b148e87
R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc90000e07ba8 R14: 0000000000000001 R15: 0000000000000003
 unregister_netdevice_many.part.0+0x1a/0x2f0 net/core/dev.c:10429
 unregister_netdevice_many+0x36/0x50 net/core/dev.c:10428
 ip6gre_exit_batch_net+0x511/0x750 net/ipv6/ip6_gre.c:1609
 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:189
 cleanup_net+0x4ea/0xa00 net/core/net_namespace.c:603
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (33):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Maintainers
ci-qemu-upstream	2020/09/24 17:13	upstream	c9c9e6a4	54289b08	.config	log	report	info	akpm@linux-foundation.org, bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-selinux-root	2020/09/23 13:26	upstream	805c6d3c	287cd75a	.config	log	report	info	jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-kasan-gce-selinux-root	2020/09/21 12:31	upstream	ba4f184e	9e1fa68e	.config	log	report	info	jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-kasan-gce-selinux-root	2020/09/21 08:08	upstream	ba4f184e	9564d2e9	.config	log	report	info	davem@davemloft.net, johan.hedberg@gmail.com, kuba@kernel.org, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, marcel@holtmann.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-root	2020/09/19 01:04	upstream	10b82d51	53ce8104	.config	log	report	info	jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-kasan-gce-selinux-root	2020/09/17 14:12	upstream	5925fa68	8247808b	.config	log	report	info	jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-qemu-upstream	2020/09/16 01:14	upstream	fc4f28bb	18d7d030	.config	log	report	info	akpm@linux-foundation.org, bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-root	2020/09/12 23:52	upstream	729e3d09	ce441f06	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-kasan-gce-smack-root	2020/09/09 17:01	upstream	34d4ddd3	0ea7a887	.config	log	report		davem@davemloft.net, johan.hedberg@gmail.com, kuba@kernel.org, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, marcel@holtmann.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-selinux-root	2020/09/05 16:52	upstream	c70672d8	abf9ba4f	.config	log	report		davem@davemloft.net, johan.hedberg@gmail.com, kuba@kernel.org, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, marcel@holtmann.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-selinux-root	2020/09/04 19:45	upstream	59126901	abf9ba4f	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-kasan-gce-selinux-root	2020/09/02 23:02	upstream	9c7d619b	abf9ba4f	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-kasan-gce-root	2020/09/02 05:01	upstream	b765a32a	abf9ba4f	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-kasan-gce-root	2020/08/31 14:02	upstream	dcc5c6f0	d5a3ae1f	.config	log	report		davem@davemloft.net, johan.hedberg@gmail.com, kuba@kernel.org, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, marcel@holtmann.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-selinux-root	2020/08/31 00:47	upstream	1127b219	d5a3ae1f	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-kasan-gce-selinux-root	2020/08/29 20:58	upstream	4d41ead6	d5a3ae1f	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-kasan-gce-root	2020/08/28 14:55	upstream	15bc20c6	816e0689	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-kasan-gce-smack-root	2020/08/28 12:34	upstream	15bc20c6	816e0689	.config	log	report		axboe@kernel.dk, justin@coraid.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci-qemu-upstream	2020/08/28 03:14	upstream	fffe3ae0	816e0689	.config	log	report		akpm@linux-foundation.org, linux-kernel@vger.kernel.org, mingo@kernel.org, paulmck@kernel.org, peterz@infradead.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/08/26 14:56	upstream	2ac69819	318430cb	.config	log	report		axboe@kernel.dk, justin@coraid.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci-qemu-upstream	2020/08/22 16:15	upstream	fffe3ae0	6436ce4b	.config	log	report		akpm@linux-foundation.org, bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, tglx@linutronix.de, x86@kernel.org
ci-qemu-upstream	2020/08/14 22:07	upstream	fffe3ae0	5ce13532	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-kasan-gce-386	2020/08/20 23:24	upstream	da2968ff	1d75fe45	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-qemu-upstream-386	2020/08/18 23:01	upstream	00e4db51	e1c29030	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-qemu-upstream-386	2020/07/31 00:25	upstream	e2c46b57	8df85ed9	.config	log	report		akpm@linux-foundation.org, bp@alien8.de, hkallweit1@gmail.com, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-bpf-next-kasan-gce	2020/08/04 19:18	bpf-next	21594c44	80a06902	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-bpf-next-kasan-gce	2020/08/03 05:45	bpf-next	b5cc46cd	196277c4	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-linux-next-kasan-gce-root	2020/09/24 05:11	linux-next	dcf2427b	54289b08	.config	log	report	info	davem@davemloft.net, johan.hedberg@gmail.com, kuba@kernel.org, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, marcel@holtmann.org, netdev@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2020/09/23 10:42	linux-next	e6499702	3e8f6c27	.config	log	report	info	davem@davemloft.net, johan.hedberg@gmail.com, kuba@kernel.org, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, marcel@holtmann.org, netdev@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2020/09/19 04:08	linux-next	b652d2a5	53ce8104	.config	log	report	info	jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-linux-next-kasan-gce-root	2020/09/11 23:42	linux-next	d5b2251d	79fb24e2	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-linux-next-kasan-gce-root	2020/09/08 22:46	linux-next	dff9f829	abf9ba4f	.config	log	report		jiangshanlai@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org
ci-upstream-linux-next-kasan-gce-root	2020/09/04 23:33	linux-next	7a695657	abf9ba4f	.config	log	report		davem@davemloft.net, johan.hedberg@gmail.com, kuba@kernel.org, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, marcel@holtmann.org, netdev@vger.kernel.org