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: 552d, last: 4d12h

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 (545):
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-root	2021/09/24 15:46	upstream	f9e36107ec70	8cac236e	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-kasan-gce-root	2021/09/01 02:45	upstream	b91db6a0b52e	7eb7e152	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-kasan-gce-root	2021/08/22 01:08	upstream	fa54d366a6e4	b599f2fc	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-kasan-gce-selinux-root	2021/07/03 19:51	upstream	3dbdb38e2869	55aa55c2	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-kasan-gce-smack-root	2021/07/03 04:49	upstream	3dbdb38e2869	55aa55c2	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/10/14 10:27	bpf	732b74d64704	5462d470	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-net-this-kasan-gce	2021/10/11 23:01	net	732b74d64704	838e7e2c	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/10/08 21:23	bpf	8d6c414cd2fb	efe0f24d	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-net-this-kasan-gce	2021/09/27 14:50	net	763716a55cb1	78494d16	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/09/27 13:41	bpf	a3debf177f21	78494d16	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/09/22 14:08	bpf	bc23f7244817	169724fe	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/09/14 11:12	bpf	57f780f1c433	58d09404	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/09/11 23:44	bpf	57f780f1c433	5ae8508a	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/08/31 17:18	bpf	57f780f1c433	8f58a0ef	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-net-this-kasan-gce	2021/08/27 18:27	net	73367f05b25d	b318694d	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/08/25 00:22	bpf	5b029a32cfe4	b599f2fc	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/08/21 17:41	bpf	316749009fdf	b599f2fc	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/08/18 08:08	bpf	3776f3517ed9	a2fe1cb5	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-net-this-kasan-gce	2021/08/12 19:11	net	6922110d152e	6972b106	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/08/12 17:42	bpf	2d3a1e3615c5	6972b106	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/08/10 01:23	bpf	d09c548dbf3b	6972b106	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/08/08 09:26	bpf	c4eb1f403243	6972b106	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/08/06 20:41	bpf	a02215ce72a3	f9e341e3	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/07/27 18:52	bpf	d6371c76e20d	fd511809	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/07/27 07:24	bpf	d6371c76e20d	fd511809	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/07/22 03:12	bpf	d6371c76e20d	29c3f20f	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-kasan-gce	2021/07/16 10:56	bpf	91091656252f	f115ae98	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-net-kasan-gce	2021/10/08 17:14	net-next	9fe1155233c8	efe0f24d	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/09/16 19:13	bpf-next	336562752acc	aae492f2	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/09/15 01:31	bpf-next	14bef1ab3037	07e953c1	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/09/08 11:19	bpf-next	006a5099fc18	e2776ee4	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/09/07 16:07	bpf-next	27151f177827	6ca60148	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/08/30 07:43	bpf-next	47bb27a20d6e	be2c130d	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/08/26 06:59	bpf-next	eb529c5b10b9	b599f2fc	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/08/23 17:15	bpf-next	d359902d5c35	b599f2fc	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-net-kasan-gce	2021/08/22 17:22	net-next	9b60ac54ab7c	b599f2fc	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/08/18 20:59	bpf-next	8cacfc85b615	a2fe1cb5	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/08/18 17:32	bpf-next	8cacfc85b615	a2fe1cb5	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/08/17 22:07	bpf-next	3c3bd542ffbb	a2fe1cb5	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-net-kasan-gce	2021/08/15 15:12	net-next	e4637f621203	2489ab88	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/08/11 02:30	bpf-next	874be05f525e	6972b106	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/08/10 11:54	bpf-next	6aab1c81b98a	6972b106	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-net-kasan-gce	2021/08/06 19:08	net-next	0ca8d3ca4561	f9e341e3	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/07/26 13:37	bpf-next	2b7e9f25e590	fd511809	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-net-kasan-gce	2021/07/24 01:28	net-next	090597b4a9c1	bc5f1d88	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/07/22 05:24	bpf-next	807b8f0e24e6	29c3f20f	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/07/21 09:09	bpf-next	c39aa2159974	1b201b48	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/07/21 03:18	bpf-next	c39aa2159974	1b201b48	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/07/19 11:06	bpf-next	78e4a955928e	e6a17580	.config	log	report			info	WARNING in bpf_cgroup_link_release
ci-upstream-bpf-next-kasan-gce	2021/07/06 20:58	bpf-next	dbe69e433722	cca78469	.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