WARNING in input_mt_init

WARNING in input_mt_init_slots
Status: upstream: reported C repro on 2021/01/10 23:30
Reported-by: syzbot+0122fa359a69694395d5@syzkaller.appspotmail.com
First crash: 202d, last: 13h26m

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: syz .config

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2021/02/02 12:12	14m	snovitoll@gmail.com		https://linux.googlesource.com/linux/kernel/git/torvalds/linux refs/changes/17/8017/1	OK
2021/02/02 12:04	5m	snovitoll@gmail.com		https://linux.googlesource.com/linux/kernel/git/torvalds/linux refs/changes/17/8017/1	error

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 0 PID: 8445 at mm/page_alloc.c:5366 current_gfp_context include/linux/sched/mm.h:166 [inline]
WARNING: CPU: 0 PID: 8445 at mm/page_alloc.c:5366 __alloc_pages+0x45d/0x500 mm/page_alloc.c:5378
Modules linked in:
CPU: 1 PID: 8445 Comm: syz-executor340 Not tainted 5.14.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__alloc_pages+0x45d/0x500 mm/page_alloc.c:5366
Code: be c9 00 00 00 48 c7 c7 40 cd 96 89 c6 05 c7 62 a5 0b 01 e8 75 93 35 07 e9 6a ff ff ff 0f 0b e9 a0 fd ff ff 40 80 e5 3f eb 88 <0f> 0b e9 18 ff ff ff 4c 89 ef 44 89 e6 45 31 ed e8 6e 74 ff ff e9
RSP: 0018:ffffc9000174fb98 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff920002e9f74 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000016 RDI: 0000000000040dc0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff81b87906 R11: 0000000000000001 R12: ffffffff90237ea0
R13: 0000000000000016 R14: 0000000000000000 R15: ffff88802ede4168
FS:  0000000000983300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8e0867e6c0 CR3: 00000000362d6000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2244
 kmalloc_order+0x34/0xf0 mm/slab_common.c:955
 kmalloc_order_trace+0x14/0x120 mm/slab_common.c:971
 kmalloc include/linux/slab.h:596 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 input_mt_init_slots drivers/input/input-mt.c:49 [inline]
 input_mt_init_slots+0xd9/0x5f0 drivers/input/input-mt.c:38
 uinput_create_device drivers/input/misc/uinput.c:327 [inline]
 uinput_ioctl_handler.isra.0+0x81d/0x1dc0 drivers/input/misc/uinput.c:870
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x43fa69
Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd252e1b48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043fa69
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000003
RBP: 0000000000403a50 R08: 0000000000400488 R09: 0000000000400488
R10: 0000000000400488 R11: 0000000000000246 R12: 0000000000403ae0
R13: 0000000000000000 R14: 00000000004ad018 R15: 0000000000400488

Crashes (179):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce	2021/07/28 01:24	upstream	7d549995d4e0	17d6ab15	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/27 19:46	upstream	ff1176468d36	fd511809	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/27 17:11	upstream	ff1176468d36	fd511809	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/26 03:09	upstream	d8079fac1681	4d1b57d4	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/25 14:34	upstream	7ffca2bb9d8b	4d1b57d4	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/23 18:36	upstream	9bead1b58c4c	bc5f1d88	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/23 13:17	upstream	9bead1b58c4c	bc5f1d88	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/23 04:57	upstream	9bead1b58c4c	bc5f1d88	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/22 07:47	upstream	7b6ae471e541	29c3f20f	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/07/17 10:10	upstream	872f8edeb6bd	f115ae98	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/16 08:58	upstream	dd9c7df94c1b	f115ae98	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/14 02:14	upstream	40226a3d96ef	fa0594c3	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/07/13 04:20	upstream	7fef2edf7cc7	f415556d	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/07/08 07:56	upstream	3dbdb38e2869	95793bce	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/07/08 07:36	upstream	3dbdb38e2869	95793bce	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/06/29 11:02	upstream	233a806b00e3	9d2ab5df	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/24 17:03	upstream	7426cedc7dad	ec865f6a	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/21 22:50	upstream	13311e74253f	aba2b2fb	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/21 03:22	upstream	cba5e97280f5	aba2b2fb	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/13 08:17	upstream	8ecfa36cd4db	1ba81399	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/11 16:21	upstream	06af8679449d	1ba81399	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/09 05:19	upstream	4c8684fe555e	5c2fe346	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/08 04:06	upstream	614124bea77e	e59537be	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/02/28 12:26	upstream	5695e5161974	4c37c133	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/02/28 12:05	upstream	5695e5161974	4c37c133	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/02/24 16:14	upstream	c03c21ba6f4e	fcc6d71b	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/06/29 10:39	upstream	233a806b00e3	9d2ab5df	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/06/22 09:40	upstream	a96bfed64c89	aba2b2fb	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/06/21 04:40	upstream	cba5e97280f5	aba2b2fb	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/06/18 12:07	upstream	fd0aa1a4567d	aba2b2fb	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/02/28 03:56	upstream	3fb6d0e00efc	4c37c133	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/01/08 04:17	upstream	f5e6c330254a	c104d4a3	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2021/07/15 11:08	upstream	8096acd7442e	b9a2f64e	.config	log	report	syz			WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/02/26 19:10	upstream	2c87f7a38f93	4c37c133	.config	log	report	syz			WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/01/06 23:26	upstream	9f1abbe97c08	c104d4a3	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2021/07/27 02:06	upstream	ff1176468d36	fd511809	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/07/26 04:33	upstream	d8079fac1681	4d1b57d4	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/23 11:00	upstream	9bead1b58c4c	bc5f1d88	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/20 08:27	upstream	2734d6c1b1a0	bc48c9ab	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/07/19 03:15	upstream	1d67c8d993ba	f115ae98	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/07/18 21:38	upstream	1d67c8d993ba	f115ae98	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/07/12 10:12	upstream	e73f0f0ee754	a4869c92	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/06 23:26	upstream	3dbdb38e2869	cca78469	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/07/06 03:51	upstream	3dbdb38e2869	55aa55c2	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/25 17:47	upstream	44db63d1ad8d	ae6bf8dd	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/06/25 13:38	upstream	44db63d1ad8d	0edbbe31	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/06/25 12:26	upstream	44db63d1ad8d	0edbbe31	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/23 05:26	upstream	0c18f29aae7c	aba2b2fb	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/22 12:06	upstream	13311e74253f	aba2b2fb	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/15 04:24	upstream	009c9aa5be65	1ba81399	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/13 19:09	upstream	8ecfa36cd4db	1ba81399	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/06 17:35	upstream	f5b6eb1e0182	500c2339	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/06/04 19:40	upstream	f88cd3fb9df2	966a236b	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/06/02 21:51	upstream	324c92e5e0ee	0740de69	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/06/02 20:17	upstream	231bc5390667	0740de69	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/05/29 12:07	upstream	5ff2756afde0	858ea628	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/05/16 15:41	upstream	63d1cb53e26a	f54a5c09	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/05/14 15:13	upstream	315d99318179	8bdd5343	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/05/06 05:53	upstream	d2b6f8a17919	06c27ff5	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/05/05 21:55	upstream	d2b6f8a17919	06c27ff5	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/05/05 20:09	upstream	d2b6f8a17919	06c27ff5	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/05/05 20:05	upstream	d2b6f8a17919	06c27ff5	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/05/02 15:23	upstream	d2b6f8a17919	77e2b668	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/05/02 12:57	upstream	d2b6f8a17919	77e2b668	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/05/02 11:20	upstream	d2b6f8a17919	77e2b668	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/04/30 18:47	upstream	d2b6f8a17919	77e2b668	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/04/29 15:42	upstream	d72cd4ad4174	77e2b668	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/04/26 13:33	upstream	9f4ad9e425a1	2a82f1b3	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/04/24 17:19	upstream	e77a830c8297	17f0b706	.config	log	report			info	WARNING in input_mt_init_slots
ci-qemu-upstream-386	2021/07/21 04:15	upstream	8cae8cd89f05	1b201b48	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/06/23 17:26	upstream	0c18f29aae7c	aba2b2fb	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/06/03 00:48	upstream	324c92e5e0ee	0740de69	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/05/20 04:27	upstream	c3d0e3fd41b7	a343ba6b	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/05/15 03:46	upstream	bd3c9cdb21a2	8bdd5343	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/05/09 15:56	upstream	b741596468b0	bc5434be	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/05/02 22:52	upstream	d2b6f8a17919	77e2b668	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-linux-next-kasan-gce-root	2021/07/20 08:29	linux-next	c1a6d08348fc	bc48c9ab	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-linux-next-kasan-gce-root	2021/07/17 13:06	linux-next	c1a6d08348fc	f115ae98	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-linux-next-kasan-gce-root	2021/07/14 18:36	linux-next	c0d438dbc0b7	94e0b707	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-linux-next-kasan-gce-root	2021/05/25 14:17	linux-next	a1f92694393a	3c7fef33	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/01/08 07:15	upstream	f5e6c330254a	c104d4a3	.config	log	report			info
ci-upstream-kasan-gce	2021/01/06 23:09	upstream	9f1abbe97c08	c104d4a3	.config	log	report			info