WARNING: ODEBUG bug in netdev

WARNING: ODEBUG bug in netdev_freemem (2)
Status: upstream: reported syz repro on 2019/06/24 08:53
Reported-by: syzbot+c4521ac872a4ccc3afec@syzkaller.appspotmail.com
First crash: 736d, last: 97d

Cause bisection: failed (bisect log)

Fix bisection: failed (bisect log)

similar bugs (3):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	WARNING: ODEBUG bug in netdev_freemem				179	484d	781d	0/1	auto-closed as invalid on 2020/06/20 15:09
linux-4.19	WARNING: ODEBUG bug in netdev_freemem	syz		error	243	485d	794d	0/1	upstream: reported syz repro on 2019/04/17 11:08
upstream	WARNING: ODEBUG bug in netdev_freemem	syz	done		1042	736d	901d	13/22	fixed on 2019/06/14 18:22

Sample crash report:

ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 arch/x86/include/asm/paravirt.h:756
WARNING: CPU: 1 PID: 9025 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 lib/debugobjects.c:481
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 9025 Comm: kworker/u4:5 Not tainted 5.4.0-rc5+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x289/0x300 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:debug_print_object+0x168/0x250 lib/debugobjects.c:481
Code: dd a0 f9 e6 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd a0 f9 e6 87 48 c7 c7 00 ef e6 87 e8 c0 18 fd fd <0f> 0b 83 05 c3 6b 7f 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3
RSP: 0000:ffff88809aa8f838 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815cc2b6 RDI: ffffed1013551ef9
RBP: ffff88809aa8f878 R08: ffff888094ae2340 R09: ffffed1015d24101
R10: ffffed1015d24100 R11: ffff8880ae920807 R12: 0000000000000001
R13: ffffffff88fb5880 R14: ffffffff81627ea0 R15: ffff8880a924af50
 __debug_check_no_obj_freed lib/debugobjects.c:963 [inline]
 debug_check_no_obj_freed+0x2d4/0x43f lib/debugobjects.c:994
 kfree+0xf8/0x2c0 mm/slab.c:3755
 kvfree+0x61/0x70 mm/util.c:593
 netdev_freemem+0x4c/0x60 net/core/dev.c:9148
 netdev_release+0x86/0xb0 net/core/net-sysfs.c:1635
 device_release+0x7a/0x210 drivers/base/core.c:1101
 kobject_cleanup lib/kobject.c:693 [inline]
 kobject_release lib/kobject.c:722 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put.cold+0x289/0x2e6 lib/kobject.c:739
 netdev_run_todo+0x535/0x7d0 net/core/dev.c:9053
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:112
 default_device_exit_batch+0x36a/0x420 net/core/dev.c:9836
 ops_exit_list.isra.0+0x10c/0x160 net/core/net_namespace.c:175
 cleanup_net+0x52e/0xae0 net/core/net_namespace.c:595
 process_one_work+0x9af/0x1740 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (1332):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	VM info	Title
ci-upstream-kasan-gce	2019/11/01 13:43	upstream	e472c64a	a41ca8fa	.config	log	report	syz
ci-upstream-bpf-kasan-gce	2019/09/26 02:00	bpf	4670d68b	a3355dba	.config	log	report	syz
ci-upstream-net-kasan-gce	2019/08/08 00:24	net-next	13dfb3fa	e6ebef88	.config	log	report	syz
ci-qemu2-arm32	2021/03/14 15:51	upstream	88fe4924	4a003785	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/03/13 08:41	upstream	f296bfd5	4a003785	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/03/12 08:42	upstream	28806e4d	429d8a6b	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/11 18:47	upstream	a74e6a01	c2ca1f2a	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/10 03:46	upstream	144c79ef	26967e35	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/09 17:35	upstream	144c79ef	26967e35	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/09 10:11	upstream	144c79ef	09fbf400	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/03/08 22:47	upstream	144c79ef	09fbf400	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/08 10:50	upstream	144c79ef	09fbf400	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/03/08 09:30	upstream	144c79ef	09fbf400	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/07 12:43	upstream	a38fd874	c599ed12	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/07 02:49	upstream	a38fd874	e4b4d570	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/06 18:51	upstream	a38fd874	e4b4d570	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/06 14:10	upstream	a38fd874	e4b4d570	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/03/06 08:04	upstream	a38fd874	e4b4d570	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/06 00:43	upstream	280d542f	4a024a9b	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/05 03:35	upstream	cee407c5	f89ed068	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/04 20:00	upstream	f69d02e3	f89ed068	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/04 10:49	upstream	f69d02e3	d7e4e604	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/03/04 02:26	upstream	f69d02e3	d7e4e604	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/03/03 21:34	upstream	f69d02e3	06ed56cd	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/02 16:56	upstream	7a7fd0de	92ead296	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/02 09:11	upstream	7a7fd0de	92ead296	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/02 02:48	upstream	7a7fd0de	183afb6c	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/03/01 22:51	upstream	7a7fd0de	183afb6c	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/01 10:33	upstream	fe07bfda	4c37c133	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/03/01 03:44	upstream	cd278456	4c37c133	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/02/28 14:00	upstream	5695e516	4c37c133	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/02/28 07:23	upstream	5695e516	4c37c133	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/02/27 18:45	upstream	3fb6d0e0	4c37c133	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/02/26 19:32	upstream	8b83369d	4c37c133	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/02/26 17:56	upstream	2c87f7a3	4c37c133	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/02/26 13:34	upstream	2c87f7a3	4c37c133	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/02/26 05:25	upstream	2c87f7a3	76f7fc95	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/02/25 21:56	upstream	29c395c7	76f7fc95	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/02/25 19:49	upstream	29c395c7	76f7fc95	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64	2021/02/25 11:29	upstream	29c395c7	fcc6d71b	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/02/25 06:34	upstream	719bbd4a	fcc6d71b	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/02/24 23:59	upstream	719bbd4a	fcc6d71b	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/02/24 16:47	upstream	c03c21ba	fcc6d71b	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/02/24 10:26	upstream	c03c21ba	fcc6d71b	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-arm64-compat	2021/02/24 04:00	upstream	c03c21ba	fcc6d71b	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-riscv64	2021/03/14 13:00	git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes	0d7588ab	4a003785	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-riscv64	2021/03/13 11:01	git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes	0d7588ab	4a003785	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-qemu2-riscv64	2021/03/11 03:36	git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes	0d7588ab	c2ca1f2a	.config	log	report		info	WARNING: ODEBUG bug in netdev_freemem
ci-upstream-kasan-gce-selinux-root	2020/03/01 22:21	upstream	63623fd4	c88c7b75	.config	log	report
ci-upstream-kasan-gce-root	2020/02/27 09:53	upstream	f8788d86	59b57593	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/02/21 16:14	upstream	ca7e1fd1	bd2a74a3	.config	log	report
ci-upstream-kasan-gce	2020/02/04 03:07	upstream	754beeec	93e5e335	.config	log	report
ci-qemu-upstream	2020/01/16 03:20	upstream	51d69817	f9b69507	.config	log	report
ci-upstream-kasan-gce-smack-root	2019/06/15 03:50	upstream	fd6b99fa	442206d7	.config	log	report
ci-upstream-kasan-gce-386	2020/01/23 09:12	upstream	dbab40bd	3334d684	.config	log	report
ci-upstream-net-this-kasan-gce	2020/03/01 14:07	net	3614d05b	c88c7b75	.config	log	report
ci-upstream-bpf-kasan-gce	2020/02/18 12:06	bpf	e20d3a05	1ce142dc	.config	log	report
ci-upstream-bpf-kasan-gce	2019/06/14 23:33	bpf	86723c86	442206d7	.config	log	report
ci-upstream-bpf-next-kasan-gce	2020/03/03 23:17	bpf-next	80a836c2	c88c7b75	.config	log	report
ci-upstream-bpf-next-kasan-gce	2020/03/03 13:21	bpf-next	80a836c2	c88c7b75	.config	log	report
ci-upstream-net-kasan-gce	2020/02/28 15:57	net-next	c3e042f5	59b57593	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/03/04 16:31	linux-next	c99b17ac	c88c7b75	.config	log	report