BUG: corrupted list in em28xx_init

BUG: corrupted list in em28xx_init_extension
Status: upstream: reported C repro on 2020/01/23 13:17
Reported-by: syzbot+a6969ef522a36d3344c9@syzkaller.appspotmail.com
First crash: 271d, last: 106d

duplicates (3):
Title	Repro	Count	Last	Reported	Patched	Status
BUG: corrupted list in corrupted (3)	C	1	122d	118d	0/17	closed as dup on 2020/06/24 12:45
WARNING in em28xx_init_extension	C	4	346d	388d	0/17	closed as dup on 2020/03/09 15:24
KASAN: use-after-free Read in em28xx_init_extension	C	4	51d	392d	0/17	closed as dup on 2020/03/09 15:23

Sample crash report:

em28xx 1-1:0.125: Audio interface 125 found (Vendor Class)
em28xx 1-1:0.125: unknown em28xx chip ID (0)
em28xx 1-1:0.125: Config register raw data: 0xfffffffb
em28xx 1-1:0.125: AC97 chip type couldn't be determined
em28xx 1-1:0.125: No AC97 audio processor
list_add corruption. prev->next should be next (ffffffff87c96740), but was ffffffff83747638. (prev=ffff8881cdeb4250).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:26!
invalid opcode: 0000 [#1] SMP KASAN
CPU: 1 PID: 68 Comm: kworker/1:2 Not tainted 5.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
RIP: 0010:__list_add_valid.cold+0x3a/0x3c lib/list_debug.c:26
Code: 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 c0 96 1c 86 e8 6a 2d 3c ff 0f 0b 48 89 f1 48 c7 c7 40 96 1c 86 4c 89 e6 e8 56 2d 3c ff <0f> 0b 48 89 ee 48 c7 c7 e0 97 1c 86 e8 45 2d 3c ff 0f 0b 4c 89 ea
RSP: 0018:ffff8881d58b7000 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff8881cd208130 RCX: 0000000000000000
RDX: ffff8881d6eae400 RSI: ffffffff8129b4e3 RDI: ffffed103ab16df2
RBP: ffff8881cd208250 R08: 0000000000000075 R09: ffff8881db32f50f
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87c96740
R13: ffff8881cd208000 R14: ffff8881cd20813c R15: ffff8881cdafc000
FS:  0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a4160c9ff0 CR3: 00000001c7053000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_add include/linux/list.h:67 [inline]
 list_add_tail include/linux/list.h:100 [inline]
 em28xx_init_extension+0x44/0x1f0 drivers/media/usb/em28xx/em28xx-core.c:1125
 em28xx_init_dev.constprop.0+0xa80/0x15cb drivers/media/usb/em28xx/em28xx-cards.c:3558
 em28xx_usb_probe.cold+0xcb6/0x252f drivers/media/usb/em28xx/em28xx-cards.c:3907
 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:374
 really_probe+0x291/0xc90 drivers/base/dd.c:525
 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:701
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:807
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431
 __device_attach+0x28d/0x430 drivers/base/dd.c:873
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0xb09/0x1b40 drivers/base/core.c:2680
 usb_set_configuration+0xf05/0x18a0 drivers/usb/core/message.c:2032
 usb_generic_driver_probe+0xba/0xf2 drivers/usb/core/generic.c:241
 usb_probe_device+0xd9/0x250 drivers/usb/core/driver.c:272
 really_probe+0x291/0xc90 drivers/base/dd.c:525
 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:701
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:807
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431
 __device_attach+0x28d/0x430 drivers/base/dd.c:873
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0xb09/0x1b40 drivers/base/core.c:2680
 usb_new_device.cold+0x71d/0xfd4 drivers/usb/core/hub.c:2554
 hub_port_connect drivers/usb/core/hub.c:5208 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5348 [inline]
 port_event drivers/usb/core/hub.c:5494 [inline]
 hub_event+0x2361/0x4390 drivers/usb/core/hub.c:5576
 process_one_work+0x94c/0x15f0 kernel/workqueue.c:2269
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x82b/0x1120 kernel/workqueue.c:2417
 kthread+0x392/0x470 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Modules linked in:
---[ end trace 856b9505d16e1586 ]---
RIP: 0010:__list_add_valid.cold+0x3a/0x3c lib/list_debug.c:26
Code: 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 c0 96 1c 86 e8 6a 2d 3c ff 0f 0b 48 89 f1 48 c7 c7 40 96 1c 86 4c 89 e6 e8 56 2d 3c ff <0f> 0b 48 89 ee 48 c7 c7 e0 97 1c 86 e8 45 2d 3c ff 0f 0b 4c 89 ea
RSP: 0018:ffff8881d58b7000 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff8881cd208130 RCX: 0000000000000000
RDX: ffff8881d6eae400 RSI: ffffffff8129b4e3 RDI: ffffed103ab16df2
RBP: ffff8881cd208250 R08: 0000000000000075 R09: ffff8881db32f50f
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87c96740
R13: ffff8881cd208000 R14: ffff8881cd20813c R15: ffff8881cdafc000
FS:  0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a4160c9ff0 CR3: 00000001c7053000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (9):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci2-upstream-usb	2020/07/06 03:13	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	768a0741	22f87567	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org
ci2-upstream-usb	2020/06/09 06:39	https://github.com/google/kasan.git usb-fuzzer	2089c6ed	0d60b78a	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org
ci2-upstream-usb	2020/05/29 01:51	https://github.com/google/kasan.git usb-fuzzer	d19c64b3	d19ed305	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org
ci2-upstream-usb	2020/05/14 04:52	https://github.com/google/kasan.git usb-fuzzer	059e7e0f	a885920d	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org
ci2-upstream-usb	2020/03/06 18:04	https://github.com/google/kasan.git usb-fuzzer	d6ff8147	7fb694ef	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org
ci2-upstream-usb	2020/03/06 14:14	https://github.com/google/kasan.git usb-fuzzer	d6ff8147	7fb694ef	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org
ci2-upstream-usb	2020/02/29 23:47	https://github.com/google/kasan.git usb-fuzzer	d6ff8147	c88c7b75	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org
ci2-upstream-usb	2020/01/23 03:16	https://github.com/google/kasan.git usb-fuzzer	4cc301ee	3334d684	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org
ci2-upstream-usb	2020/01/25 01:03	https://github.com/google/kasan.git usb-fuzzer	cd234325	2e95ab33	.config	log	report			linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org