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: 98d, last: 3d15h

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: 8378 at mm/page_alloc.c:4980 __alloc_pages_nodemask+0x5fd/0x730 mm/page_alloc.c:5015
Modules linked in:
CPU: 1 PID: 8378 Comm: syz-executor751 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__alloc_pages_nodemask+0x5fd/0x730 mm/page_alloc.c:4980
Code: 00 00 0c 00 0f 85 a7 00 00 00 8b 3c 24 4c 89 f2 44 89 e6 c6 44 24 70 00 48 89 6c 24 58 e8 ab d7 ff ff 49 89 c5 e9 e5 fc ff ff <0f> 0b e9 b0 fd ff ff 89 74 24 14 4c 89 4c 24 08 4c 89 74 24 18 e8
RSP: 0018:ffffc900090efbb0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff9200121df7a RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000040dc0
RBP: 0000000000040dc0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81b42ad1 R11: 0000000000000000 R12: 000000000000000b
R13: 000000000000000b R14: 0000000000000000 R15: 000000000000000b
FS:  0000000000a82300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1273a16c0 CR3: 000000001c2c9000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 alloc_pages_current+0x18c/0x2a0 mm/mempolicy.c:2277
 alloc_pages include/linux/gfp.h:561 [inline]
 kmalloc_order+0x30/0xd0 mm/slab_common.c:902
 kmalloc_order_trace+0x14/0x130 mm/slab_common.c:918
 kmalloc include/linux/slab.h:559 [inline]
 kzalloc include/linux/slab.h:684 [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:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x43fa59
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:00007ffc2d7c6548 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043fa59
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000003
RBP: 0000000000403a40 R08: 0000000000400488 R09: 0000000000400488
R10: 0000000000400488 R11: 0000000000000246 R12: 0000000000403ad0
R13: 0000000000000000 R14: 00000000004ad018 R15: 0000000000400488

Crashes (56):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce	2021/02/28 12:26	upstream	5695e516	4c37c133	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/02/28 12:05	upstream	5695e516	4c37c133	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/02/24 16:14	upstream	c03c21ba	fcc6d71b	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/02/28 03:56	upstream	3fb6d0e0	4c37c133	.config	log	report	syz	C		WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/01/08 04:17	upstream	f5e6c330	c104d4a3	.config	log	report	syz	C
ci-upstream-kasan-gce	2021/02/26 19:10	upstream	2c87f7a3	4c37c133	.config	log	report	syz			WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/01/06 23:26	upstream	9f1abbe9	c104d4a3	.config	log	report	syz
ci-upstream-kasan-gce	2021/04/11 17:19	upstream	52e44129	bfeda1b1	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/04/05 03:15	upstream	e49d033b	6a81331a	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/03/28 08:43	upstream	0f4498ce	a8529b82	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/03/28 05:19	upstream	0f4498ce	a8529b82	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/03/18 16:03	upstream	6417f031	7216542e	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/03/18 06:58	upstream	6417f031	fdb2bb2c	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/03/15 22:15	upstream	1e28eed1	fdb2bb2c	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/02/24 08:27	upstream	c03c21ba	fcc6d71b	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/02/24 02:36	upstream	3b9cdafb	fcc6d71b	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/02/21 14:11	upstream	e767b353	3e5ed8b4	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/02/20 14:24	upstream	f40ddce8	3e5ed8b4	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/02/17 00:30	upstream	f40ddce8	98682e5e	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/02/15 12:12	upstream	f40ddce8	98682e5e	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/02/12 05:44	upstream	291009f6	a5f86b15	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/02/12 05:34	upstream	291009f6	a5f86b15	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/02/12 05:34	upstream	291009f6	a5f86b15	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/02/10 19:28	upstream	e0756cfc	2bd9619f	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/02/10 17:14	upstream	e0756cfc	2bd9619f	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/02/10 15:09	upstream	e0756cfc	2bd9619f	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/02/03 23:56	upstream	3afe9076	624dad51	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-smack-root	2021/02/03 23:40	upstream	3afe9076	624dad51	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/02/03 23:13	upstream	3afe9076	624dad51	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/01/30 09:55	upstream	0e9bcda5	fc9fd31e	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/01/30 08:22	upstream	0e9bcda5	fc9fd31e	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/01/29 21:00	upstream	bec4c296	6593fd32	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/01/21 23:44	upstream	9791581c	d4f4eca5	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce	2021/01/18 12:15	upstream	a1339d63	fd103621	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/02/15 12:32	upstream	f40ddce8	98682e5e	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/02/12 05:51	upstream	291009f6	a5f86b15	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/02/10 18:31	upstream	e0756cfc	2bd9619f	.config	log	report			info	WARNING in input_mt_init_slots
ci-qemu-upstream-386	2021/02/10 15:16	upstream	e0756cfc	9c8b8541	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/02/03 23:45	upstream	3afe9076	624dad51	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/01/30 01:38	upstream	bec4c296	fc9fd31e	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-386	2021/01/29 02:47	upstream	e5ff2cb9	7df34f59	.config	log	report			info	WARNING in input_mt_init_slots
ci-upstream-kasan-gce-root	2021/01/08 07:15	upstream	f5e6c330	c104d4a3	.config	log	report			info
ci-upstream-kasan-gce-root	2021/01/08 05:46	upstream	f5e6c330	c104d4a3	.config	log	report			info
ci-upstream-kasan-gce-root	2021/01/08 05:46	upstream	f5e6c330	c104d4a3	.config	log	report			info
ci-upstream-kasan-gce	2021/01/08 03:38	upstream	f5e6c330	c104d4a3	.config	log	report			info
ci-upstream-kasan-gce	2021/01/08 03:38	upstream	f5e6c330	c104d4a3	.config	log	report			info
ci-upstream-kasan-gce	2021/01/06 23:09	upstream	9f1abbe9	c104d4a3	.config	log	report			info
ci-upstream-kasan-gce-386	2021/01/08 05:27	upstream	f5e6c330	c104d4a3	.config	log	report			info
ci-upstream-kasan-gce-386	2021/01/08 05:27	upstream	f5e6c330	c104d4a3	.config	log	report			info