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: 127d, last: 22d

Sample crash report:

Registered RDS/tcp transport
NET: Registered PF_SMC protocol family
9pnet: Installing 9P2000 support
Key type dns_resolver registered
Key type ceph registered
libceph: loaded (mon/osd proto 15/24)
NET: Registered PF_VSOCK protocol family
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!
Loading compiled-in module X.509 certificates
Loaded X.509 cert 'Build time autogenerated kernel key: f850c787ad998c396ae089c083b940ff0a9abb77'
ima: Allocated hash algorithm: sha256
ima: No architecture policies found
evm: Initialising EVM extended attributes:
evm: security.selinux
evm: security.SMACK64 (disabled)
evm: security.SMACK64EXEC (disabled)
evm: security.SMACK64TRANSMUTE (disabled)
evm: security.SMACK64MMAP (disabled)
evm: security.apparmor (disabled)
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 image (initmem) memory: 2048K
Failed to set sysctl parameter 'vm.nr_hugepages=4': parameter not found
Failed to set sysctl parameter 'vm.nr_overcommit_hugepages=4': parameter not found
Run /sbin/init as init process
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at include/linux/seqlock.h:271 __seqprop_assert include/linux/seqlock.h:271 [inline]
WARNING: CPU: 0 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: 0 PID: 1 Comm: init Not tainted 5.13.0-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<8186465c>] (dump_backtrace) from [<818648d0>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:252)
 r7:81f5e8dc r6:00000080 r5:81f70b1c r4:60000193
[<818648b8>] (show_stack) from [<8186bc40>] (__dump_stack lib/dump_stack.c:79 [inline])
[<818648b8>] (show_stack) from [<8186bc40>] (dump_stack_lvl+0x70/0x98 lib/dump_stack.c:96)
[<8186bbd0>] (dump_stack_lvl) from [<8186bc80>] (dump_stack+0x18/0x1c lib/dump_stack.c:103)
 r7:81f5e8dc r6:82a396e4 r5:00000000 r4:82c74098
[<8186bc68>] (dump_stack) from [<81865488>] (panic+0x130/0x378 kernel/panic.c:231)
[<81865358>] (panic) from [<80244c80>] (__warn+0xb0/0x164 kernel/panic.c:605)
 r3:82a22488 r2:00000000 r1:5bd1d000 r0:81f5e8dc
 r7:0000010f
[<80244bd0>] (__warn) from [<81865738>] (warn_slowpath_fmt+0x68/0xd4 kernel/panic.c:628)
 r7:8028e888 r6:0000010f r5:81f56c7c r4:00000000
[<818656d4>] (warn_slowpath_fmt) from [<8028e888>] (__seqprop_assert include/linux/seqlock.h:271 [inline])
[<818656d4>] (warn_slowpath_fmt) from [<8028e888>] (__seqprop_assert.constprop.0+0xf0/0x11c include/linux/seqlock.h:269)
 r8:00000000 r7:82a22494 r6:83ce0000 r5:8187f868 r4:00000001
[<8028e798>] (__seqprop_assert.constprop.0) from [<80290eb8>] (vtime_user_enter+0x20/0x8c kernel/sched/cputime.c:709)
 r5:8187f868 r4:83ce0000
[<80290e98>] (vtime_user_enter) from [<8187f868>] (__context_tracking_enter+0x148/0x334 kernel/context_tracking.c:82)
 r7:82a22494 r6:828adca0 r5:ffffe000 r4:00000001
[<8187f720>] (__context_tracking_enter) from [<8041fc38>] (context_tracking_enter kernel/context_tracking.c:122 [inline])
[<8187f720>] (__context_tracking_enter) from [<8041fc38>] (context_tracking_enter+0x54/0x84 kernel/context_tracking.c:106)
 r7:00000000 r6:00000000 r5:60000193 r4:00000001
[<8041fbe4>] (context_tracking_enter) from [<8041fc84>] (user_enter include/linux/context_tracking.h:28 [inline])
[<8041fbe4>] (context_tracking_enter) from [<8041fc84>] (context_tracking_user_enter+0x1c/0x20 kernel/context_tracking.c:130)
 r5:8187fe78 r4:00000000
[<8041fc68>] (context_tracking_user_enter) from [<802000d4>] (no_work_pending+0x8/0x38)
Exception stack(0x83cd7fb0 to 0x83cd7ff8)
7fa0:                                     00000000 00000000 00000000 00000000
7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
7fe0: 00000000 7e9d3ed0 00000000 76f84a00 00000010 00000000
Rebooting in 86400 seconds..

Crashes (871):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Title
ci-qemu2-arm32	2021/07/01 20:08	upstream	c288d9cd7104	658ebc66	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/07/01 08:17	upstream	dbe69e433722	658ebc66	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/07/01 00:16	upstream	dbe69e433722	38a885d1	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/30 23:26	upstream	92183137e6c1	38a885d1	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/30 21:13	upstream	440462198d9c	38a885d1	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/30 19:24	upstream	df04fbe8680b	84fd4c77	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/30 08:13	upstream	007b350a5875	84fd4c77	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/30 04:23	upstream	007b350a5875	a4fccb01	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/30 01:54	upstream	65090f30ab79	a4fccb01	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/30 01:54	upstream	65090f30ab79	a4fccb01	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/29 22:03	upstream	349a2d52ffe5	a4fccb01	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/29 19:41	upstream	c54b245d0118	a4fccb01	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/29 04:26	upstream	c54b245d0118	9d2ab5df	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/29 01:20	upstream	233a806b00e3	9d2ab5df	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/29 00:17	upstream	122fa8c58831	9d2ab5df	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/28 21:37	upstream	1b1cf8fe9983	9d2ab5df	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/28 19:56	upstream	d04f7de0a513	9d2ab5df	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/28 18:17	upstream	66d9282523b3	9d2ab5df	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/27 23:07	upstream	62fb9874f5da	9d2ab5df	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/27 23:07	upstream	62fb9874f5da	9d2ab5df	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/27 21:17	upstream	b4b27b9eed8e	9d2ab5df	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/26 18:06	upstream	625acffd7ae2	9d2ab5df	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/26 05:55	upstream	b7050b242430	9d2ab5df	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/26 02:53	upstream	b7050b242430	ae6bf8dd	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/25 23:43	upstream	e2f527b58e81	ae6bf8dd	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/25 18:33	upstream	55fcd4493da5	ae6bf8dd	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/25 15:02	upstream	44db63d1ad8d	ae6bf8dd	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/25 15:02	upstream	44db63d1ad8d	ae6bf8dd	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/24 21:31	upstream	44db63d1ad8d	0edbbe31	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/24 20:19	upstream	4a09d388f2ab	0edbbe31	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/24 18:39	upstream	4a09d388f2ab	ec865f6a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/24 17:09	upstream	7749b0337b4e	ec865f6a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/24 08:17	upstream	7426cedc7dad	ec865f6a	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/23 19:34	upstream	7426cedc7dad	fe4ab389	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/23 17:43	upstream	7266f2030eb0	aba2b2fb	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/22 19:16	upstream	0c18f29aae7c	aba2b2fb	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/21 17:43	upstream	a96bfed64c89	aba2b2fb	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/20 22:53	upstream	13311e74253f	aba2b2fb	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/20 17:45	upstream	cba5e97280f5	aba2b2fb	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/19 22:44	upstream	913ec3c22ef4	aba2b2fb	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/19 22:44	upstream	913ec3c22ef4	aba2b2fb	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/19 16:34	upstream	d9403d307dba	aba2b2fb	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/19 03:04	upstream	9ed13a17e38e	aba2b2fb	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/06/19 00:34	upstream	6fab154a33ba	aba2b2fb	.config	log	report	upstream boot error: WARNING in __context_tracking_enter
ci-qemu2-arm32	2021/03/19 09:05	upstream	8b12a62a4e3e	2af9d324	.config	log	report	upstream boot error: WARNING in __context_tracking_enter