WARNING in bpf_cgroup_link

WARNING in bpf_cgroup_link_release
Status: upstream: reported C repro on 2020/04/15 06:55
Reported-by: syzbot+8a5dadc5c0b1d7055945@syzkaller.appspotmail.com
First crash: 653d, last: 7h51m

Cause bisection: failed (bisect log)

Sample crash report:

RBP: ffffffffffffffff R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009
R13: 00007ffeea853240 R14: 0000000000000000 R15: 0000000000000000
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6859 at kernel/bpf/cgroup.c:833 bpf_cgroup_link_release.part.0+0x28b/0x380 kernel/bpf/cgroup.c:833
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 6859 Comm: syz-executor054 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x4a 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:bpf_cgroup_link_release.part.0+0x28b/0x380 kernel/bpf/cgroup.c:833
Code: 01 e8 ce e0 cd ff e9 f1 fe ff ff e8 3f 60 e7 ff 48 c7 c7 00 d4 bf 89 e8 83 ad 68 06 5b 5d 41 5c e9 2a 60 e7 ff e8 25 60 e7 ff <0f> 0b e9 01 fe ff ff e8 19 60 e7 ff e8 e4 2a d4 ff 31 ff 89 c3 89
RSP: 0018:ffffc90005367d38 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888094525700 RCX: ffffffff818cdceb
RDX: ffff8880978ec240 RSI: ffffffff818cdeeb RDI: 0000000000000005
RBP: 00000000fffffff4 R08: 0000000000000001 R09: ffffffff89c97453
R10: 0000000000000000 R11: 0000000035383654 R12: ffff888094525768
R13: ffffffffffffffa1 R14: 0000000000000022 R15: 0000000000000008
 bpf_cgroup_link_release kernel/bpf/cgroup.c:822 [inline]
 bpf_cgroup_link_detach+0x38/0x50 kernel/bpf/cgroup.c:854
 link_detach kernel/bpf/syscall.c:4009 [inline]
 __do_sys_bpf+0x667/0x4c20 kernel/bpf/syscall.c:4267
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x442229
Code: e8 1c b4 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 6b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffeea8531e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442229
RDX: 0000000000000008 RSI: 0000000020000040 RDI: 0000000000000022
RBP: ffffffffffffffff R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009
R13: 00007ffeea853240 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (607):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-net-this-kasan-gce	2020/09/01 02:57	net	bb8872a1e6bc	d5a3ae1f	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2021/12/30 02:54	upstream	e7c124bd0463	6cc879d4	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-kasan-gce-selinux-root	2021/12/22 09:55	upstream	2f47a9a4dfa3	6caa12e4	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-kasan-gce-root	2021/12/19 20:03	upstream	3f667b5d4053	44068e19	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-kasan-gce-root	2021/12/03 03:04	upstream	a51e3ac43ddb	61f86278	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-kasan-gce-root	2021/12/01 03:54	upstream	f080815fdb3e	80270552	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-kasan-gce-root	2021/11/19 18:48	upstream	4c388a8e740d	3a9d0024	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-kasan-gce-smack-root	2021/11/13 22:46	upstream	66f4beaa6c1d	83f5c9b5	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-kasan-gce-selinux-root	2021/10/26 05:23	upstream	c2b43854aad9	c1132b49	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2022/01/15 19:08	bpf	343e53754b21	723cfaf0	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/12/16 10:21	bpf	e523102cb719	572bcb40	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/12/15 00:08	bpf	0be2516f865f	d018dd31	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/12/13 02:56	bpf	0be2516f865f	49ca1f59	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/12/11 02:29	bpf	0be2516f865f	49ca1f59	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/12/08 22:23	bpf	b560b21f71eb	a4a2a501	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-net-this-kasan-gce	2021/12/07 05:13	net	4dbb0dad8e63	0230ba3e	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/12/06 12:40	bpf	2fa7d94afc1a	579a8754	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/12/03 16:44	bpf	7d9b3ad424f4	c7c20675	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/12/02 00:09	bpf	099f83aa2d06	61f86278	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/12/01 02:04	bpf	79364031c5b4	80270552	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/11/29 19:12	bpf	c0d95d3380ee	d0830353	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/11/25 18:43	bpf	c0d95d3380ee	63eeac02	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/11/11 04:04	bpf	fceb07950a7a	75b04091	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/11/06 22:37	bpf	70bf363d7adb	4c1be0be	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/11/02 22:05	bpf	cc0356d6a02e	17f3edd2	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/10/27 21:07	bpf	440ffcdd9db4	373bf66b	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/10/26 07:13	bpf	04f8ef5643bc	c1132b49	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/10/25 21:56	bpf	04f8ef5643bc	4f0000ee	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2022/01/27 21:36	bpf-next	8033c6c2fed2	64a8e201	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2022/01/26 06:17	bpf-next	451c4260443a	2cbffd88	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2022/01/21 22:21	bpf-next	820e6e227c40	214351e1	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2022/01/19 09:21	bpf-next	eaa266d83a37	0620189b	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2022/01/17 04:39	bpf-next	e80f2a0d1946	723cfaf0	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2022/01/13 07:18	bpf-next	86c7ecad3bf8	44d1319a	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/12/31 18:04	bpf-next	e63a02348958	36bd2e48	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/12/28 04:41	bpf-next	4b443bc1785f	6b3c5e64	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/12/15 21:07	bpf-next	4b443bc1785f	572bcb40	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/12/10 20:33	bpf-next	666af7064562	49ca1f59	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/12/09 20:51	bpf-next	73b6eae583f4	b54aa474	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/12/08 16:51	bpf-next	fda684fb5ec9	a4a2a501	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/12/07 21:03	bpf-next	fda684fb5ec9	0230ba3e	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/12/06 16:44	bpf-next	db52f57211b4	579a8754	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/12/06 15:20	bpf-next	db52f57211b4	579a8754	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/12/05 06:15	bpf-next	866de4074443	a617004c	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/12/03 04:41	bpf-next	080a70b21f47	61f86278	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/11/27 04:20	bpf-next	e32cb12ff52a	63eeac02	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/11/26 16:26	bpf-next	8f6f41f39348	63eeac02	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/11/18 21:10	bpf-next	29ad850a5cae	31a30fc0	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/11/18 15:22	bpf-next	dd7f091fd22b	31a30fc0	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/11/10 04:01	bpf-next	5577f24cb04a	55fa030c	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/11/08 05:36	bpf-next	5577f24cb04a	4c1be0be	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/11/07 22:28	bpf-next	5577f24cb04a	4c1be0be	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/11/02 00:27	bpf-next	36e70b9b06bf	098b5d53	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-net-kasan-gce	2021/11/01 21:21	net-next	c07c6e8eb4b3	098b5d53	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/10/30 00:19	bpf-next	f48ad69097fe	098b5d53	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/01/16 09:36	bpf-next	eed6a9a9571b	65a7a854	.config	log	report			info
ci-upstream-bpf-next-kasan-gce	2020/04/14 20:11	bpf-next	1a323ea5356e	3f3c5574	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/07/08 12:21	linux-next	9e50b94b3eb0	51095195	.config	log	report