upstream boot error: WARNING in __context_tracking

upstream boot error: WARNING in __context_tracking_enter
Status: upstream: reported on 2021/03/19 09:44
Reported-by: syzbot+f09a12b2c77bfbbf51bd@syzkaller.appspotmail.com
First crash: 34d, last: 6h41m

Sample crash report:

l2tp_ip: L2TP IP encapsulation support (L2TPv3)
l2tp_netlink: L2TP netlink interface
l2tp_eth: L2TP ethernet pseudowire support (L2TPv3)
l2tp_ip6: L2TP IP encapsulation support for IPv6 (L2TPv3)
8021q: 802.1Q VLAN Support v1.8
sctp: Hash tables configured (bind 64/102)
NET: Registered protocol family 21
Registered RDS/infiniband transport
Registered RDS/tcp transport
NET: Registered protocol family 43
9pnet: Installing 9P2000 support
Key type dns_resolver registered
Key type ceph registered
libceph: loaded (mon/osd proto 15/24)
NET: Registered protocol family 40
Registering SWP/SWPB emulation handler
registered taskstats version 1
Loading compiled-in X.509 certificates
Loaded X.509 cert 'Build time autogenerated kernel key: f850c787ad998c396ae089c083b940ff0a9abb77'
zswap: loaded using pool lzo/zbud
Key type ._fscrypt registered
Key type .fscrypt registered
Key type fscrypt-provisioning registered
Key type big_key registered
Key type encrypted registered
ima: No TPM chip found, activating TPM-bypass!
ima: Allocated hash algorithm: sha256
ima: No architecture policies found
evm: Initialising EVM extended attributes:
evm: security.selinux
evm: security.ima
evm: security.capability
evm: HMAC attrs: 0x1
printk: console [netcon0] enabled
netconsole: network logging started
gtp: GTP module loaded (pdp ctx size 64 bytes)
ALSA device list:
  #0: Dummy 1
  #1: Loopback 1
  #2: Virtual MIDI Card 1
  #3: ARM AC'97 Interface PL041 rev0 at 0x1c040000, irq 36
uart-pl011 1c090000.serial: no DMA platform data
md: Skipping autodetection of RAID arrays. (raid=autodetect will force)
EXT4-fs (vda): mounted filesystem without journal. Opts: (null). Quota mode: none.
VFS: Mounted root (ext4 filesystem) readonly on device 253:0.
devtmpfs: mounted
Freeing unused kernel memory: 2048K
Failed to set sysctl parameter 'net.core.netdev_unregister_timeout_secs=420': parameter not found
Run /sbin/init as init process
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1 at include/linux/seqlock.h:271 __seqprop_assert include/linux/seqlock.h:271 [inline]
WARNING: CPU: 1 PID: 1 at include/linux/seqlock.h:271 __seqprop_assert.constprop.0+0xf0/0x11c include/linux/seqlock.h:269
Modules linked in:
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 1 Comm: init Not tainted 5.12.0-rc8-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<818088a4>] (dump_backtrace) from [<81808b18>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:252)
 r7:00000080 r6:60000193 r5:00000000 r4:82b58504
[<81808b00>] (show_stack) from [<81810250>] (__dump_stack lib/dump_stack.c:79 [inline])
[<81808b00>] (show_stack) from [<81810250>] (dump_stack+0xb8/0xe8 lib/dump_stack.c:120)
[<81810198>] (dump_stack) from [<818096ac>] (panic+0x130/0x378 kernel/panic.c:231)
 r7:81f48dac r6:82a39124 r5:00000000 r4:82c6b0d8
[<8180957c>] (panic) from [<802447a4>] (__warn+0xb0/0x164 kernel/panic.c:605)
 r3:82a2248c r2:00000000 r1:5b734000 r0:81f48dac
 r7:0000010f
[<802446f4>] (__warn) from [<8180995c>] (warn_slowpath_fmt+0x68/0xd4 kernel/panic.c:628)
 r7:8028c5ac r6:0000010f r5:81f41208 r4:00000000
[<818098f8>] (warn_slowpath_fmt) from [<8028c5ac>] (__seqprop_assert include/linux/seqlock.h:271 [inline])
[<818098f8>] (warn_slowpath_fmt) from [<8028c5ac>] (__seqprop_assert.constprop.0+0xf0/0x11c include/linux/seqlock.h:269)
 r8:00000000 r7:82a22498 r6:828ac940 r5:818241b8 r4:00000001
[<8028c4bc>] (__seqprop_assert.constprop.0) from [<8028eb4c>] (vtime_user_enter+0x1c/0x90 kernel/sched/cputime.c:709)
 r5:818241b8 r4:834f0000
[<8028eb30>] (vtime_user_enter) from [<818241b8>] (__context_tracking_enter+0x148/0x334 kernel/context_tracking.c:82)
 r7:82a22498 r6:828ac940 r5:ffffe000 r4:00000001
[<81824070>] (__context_tracking_enter) from [<80417b90>] (context_tracking_enter kernel/context_tracking.c:122 [inline])
[<81824070>] (__context_tracking_enter) from [<80417b90>] (context_tracking_enter+0x54/0x84 kernel/context_tracking.c:106)
 r7:00000000 r6:00000000 r5:60000193 r4:00000001
[<80417b3c>] (context_tracking_enter) from [<80417bdc>] (user_enter include/linux/context_tracking.h:28 [inline])
[<80417b3c>] (context_tracking_enter) from [<80417bdc>] (context_tracking_user_enter+0x1c/0x20 kernel/context_tracking.c:130)
 r5:81824820 r4:00000000
[<80417bc0>] (context_tracking_user_enter) from [<802000d4>] (no_work_pending+0x8/0x38)
Exception stack(0x834dffb0 to 0x834dfff8)
ffa0:                                     00000000 00000000 00000000 00000000
ffc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
ffe0: 00000000 7eb84ef0 00000000 76fa5a00 00000010 00000000
Rebooting in 86400 seconds..

Crashes (216):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Title
ci-qemu2-arm32	2021/04/22 22:25	upstream	90c911ad	590921a5	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/22 21:17	upstream	16fc44d6	590921a5	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/22 09:15	upstream	16fc44d6	33c28d03	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/21 20:32	upstream	16fc44d6	2bc8999a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/21 18:21	upstream	16fc44d6	95777977	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/21 08:28	upstream	1fe5501b	95777977	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/20 22:17	upstream	1fe5501b	c0ced557	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/20 22:17	upstream	1fe5501b	c0ced557	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/20 07:45	upstream	7af08140	c0ced557	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/19 22:55	upstream	7af08140	4285c989	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/19 19:44	upstream	bf05bf16	4285c989	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/19 07:41	upstream	bf05bf16	50f523d7	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/18 22:39	upstream	bf05bf16	7e2b734b	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/18 21:09	upstream	5ffe04cc	7e2b734b	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/18 04:09	upstream	c98ff1d0	7e2b734b	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/17 19:59	upstream	194cf482	7e2b734b	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/17 17:49	upstream	88a5af94	7e2b734b	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/17 17:49	upstream	88a5af94	7e2b734b	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/16 17:39	upstream	06c2aac4	7e2b734b	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/16 15:49	upstream	2f7b98d1	7e2b734b	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/16 12:37	upstream	7e25f40e	7e2b734b	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/15 18:56	upstream	7e25f40e	c59079a6	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/15 16:44	upstream	7f75285c	c59079a6	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/14 21:17	upstream	7f75285c	3134b37f	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/14 18:47	upstream	8e2e0104	3134b37f	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/14 17:07	upstream	e70b911a	3134b37f	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/14 17:07	upstream	e70b911a	3134b37f	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/14 09:35	upstream	50987bec	3134b37f	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/14 02:35	upstream	50987bec	a184b83e	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/13 19:14	upstream	89698bec	a184b83e	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/12 19:16	upstream	89698bec	bfeda1b1	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/11 19:46	upstream	7d900724	bfeda1b1	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/10 20:56	upstream	52e44129	bfeda1b1	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/10 17:46	upstream	95c7b075	bfeda1b1	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/10 06:16	upstream	d4961772	bfeda1b1	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/10 03:40	upstream	d4961772	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/10 01:09	upstream	9288e1f7	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/09 23:20	upstream	4e04e751	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/09 20:50	upstream	a2521822	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/09 02:40	upstream	17e7124a	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/09 00:29	upstream	4fa56ad0	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/08 18:59	upstream	3fb4f979	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/08 17:09	upstream	e0a472ff	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/07 19:10	upstream	3a229812	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/06 21:16	upstream	2d743660	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/05 18:10	upstream	0a50438c	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/04 21:59	upstream	e49d033b	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/04/03 22:19	upstream	d83e98f9	6a81331a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/03/19 09:05	upstream	8b12a62a	2af9d324	.config	log	report	upstream boot error: WARNING in __context_tracking_enter