WARNING in input_register

WARNING in input_register_device
Status: upstream: reported C repro on 2020/11/06 12:43
Reported-by: syzbot+92340f7b2b4789907fdb@syzkaller.appspotmail.com
Fix commit: b4104180a2ef kobject_uevent: remove warning in init_uevent_argv()
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-arm32]
First crash: 261d, last: 109d

Cause bisection: failed (bisect log)

Fix bisection: fixed by (bisect log) :
commit c318840fb2a42ce25febc95c4c19357acf1ae5ca
Author: Alan Stern <stern@rowland.harvard.edu>
Date: Wed Dec 30 16:20:44 2020 +0000

USB: Gadget: dummy-hcd: Fix shift-out-of-bounds bug

Sample crash report:

microsoft 0003:045E:07DA.0001: unknown main item tag 0x0
HID 045e:07da: Invalid code 65791 type 1
------------[ cut here ]------------
init_uevent_argv: buffer size too small
WARNING: CPU: 0 PID: 3202 at lib/kobject_uevent.c:259 init_uevent_argv lib/kobject_uevent.c:259 [inline]
WARNING: CPU: 0 PID: 3202 at lib/kobject_uevent.c:259 kobject_uevent_env+0x1640/0x1680 lib/kobject_uevent.c:608
Modules linked in:
CPU: 0 PID: 3202 Comm: kworker/0:3 Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
RIP: 0010:init_uevent_argv lib/kobject_uevent.c:259 [inline]
RIP: 0010:kobject_uevent_env+0x1640/0x1680 lib/kobject_uevent.c:608
Code: 8b e8 64 ac fe ff e9 cf f8 ff ff 48 8b 3c 24 e8 e6 76 e1 fd e9 a9 f8 ff ff e8 3c f9 9f fd 48 c7 c7 c0 bb a0 89 e8 bc 47 dc 04 <0f> 0b 41 bf f4 ff ff ff e9 51 ec ff ff 4c 89 ff e8 3b 76 e1 fd e9
RSP: 0018:ffffc9000209e8e0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000
RDX: ffff88801a559a40 RSI: ffffffff8158c865 RDI: fffff52000413d0e
RBP: 00000000000007fb R08: 0000000000000001 R09: ffff8880b9e30627
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000005
R13: 00000000000007fb R14: 0000000000000005 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004c41a8 CR3: 000000000b08e000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 device_add+0xb47/0x1ce0 drivers/base/core.c:2917
 input_register_device+0x73a/0xce0 drivers/input/input.c:2212
 hidinput_connect+0x5056/0x9d50 drivers/hid/hid-input.c:1952
 hid_connect+0x958/0xbc0 drivers/hid/hid-core.c:1949
 hid_hw_start drivers/hid/hid-core.c:2053 [inline]
 hid_hw_start+0xa2/0x130 drivers/hid/hid-core.c:2044
 ms_probe+0x159/0x4b0 drivers/hid/hid-microsoft.c:391
 hid_device_probe+0x2bd/0x3f0 drivers/hid/hid-core.c:2281
 really_probe+0x291/0xde0 drivers/base/dd.c:554
 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:738
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:844
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431
 __device_attach+0x228/0x4a0 drivers/base/dd.c:912
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0xbb2/0x1ce0 drivers/base/core.c:2936
 hid_add_device+0x344/0x9d0 drivers/hid/hid-core.c:2437
 usbhid_probe+0xaae/0xfc0 drivers/hid/usbhid/hid-core.c:1407
 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396
 really_probe+0x291/0xde0 drivers/base/dd.c:554
 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:738
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:844
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431
 __device_attach+0x228/0x4a0 drivers/base/dd.c:912
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0xbb2/0x1ce0 drivers/base/core.c:2936
 usb_set_configuration+0x113c/0x1910 drivers/usb/core/message.c:2159
 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293
 really_probe+0x291/0xde0 drivers/base/dd.c:554
 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:738
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:844
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431
 __device_attach+0x228/0x4a0 drivers/base/dd.c:912
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0xbb2/0x1ce0 drivers/base/core.c:2936
 usb_new_device.cold+0x71d/0xfe9 drivers/usb/core/hub.c:2554
 hub_port_connect drivers/usb/core/hub.c:5222 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
 port_event drivers/usb/core/hub.c:5508 [inline]
 hub_event+0x2348/0x42d0 drivers/usb/core/hub.c:5590
 process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Crashes (11):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce	2020/12/14 23:50	upstream	2c85ebc57b3e	97183ed7	.config	log	report	syz	C
ci2-upstream-usb	2020/12/18 22:32	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	5e60366d56c6	04201c06	.config	log	report	syz	C
ci2-upstream-usb	2020/11/06 12:29	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	9e39aef3a105	cba33199	.config	log	report	syz	C
ci2-upstream-usb	2021/04/07 00:51	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e9fcb07704fc	6a81331a	.config	log	report			info	WARNING in input_register_device
ci2-upstream-usb	2021/02/18 15:51	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	b5a12546e779	14052202	.config	log	report			info	WARNING in input_register_device
ci2-upstream-usb	2021/02/15 11:21	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	b5a12546e779	98682e5e	.config	log	report			info	WARNING in input_register_device
ci2-upstream-usb	2021/02/02 09:48	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	29b01295a829	19e09687	.config	log	report			info	WARNING in input_register_device
ci2-upstream-usb	2021/02/01 18:32	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	29b01295a829	e6b95f32	.config	log	report			info	WARNING in input_register_device
ci2-upstream-usb	2021/02/01 08:32	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	3c648d3deb0f	fc9fd31e	.config	log	report			info	WARNING in input_register_device
ci2-upstream-usb	2020/11/14 15:39	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	56c62080d5b5	1bf9a662	.config	log	report			info
ci2-upstream-usb	2020/11/06 11:53	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	9e39aef3a105	cba33199	.config	log	report			info