list_add corruption. prev->next should be next (ffffffff87a1ab40), but was ffffffff85a00184. (prev=ffff8881d3aac240).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:26!
invalid opcode: 0000 [#1] SMP KASAN
CPU: 1 PID: 5017 Comm: kworker/1:6 Not tainted 5.5.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events request_module_async
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 20 00 fc 85 e8 d4 2e 40 ff 0f 0b 48 89 f1 48 c7 c7 a0 ff fb 85 4c 89 e6 e8 c0 2e 40 ff <0f> 0b 48 89 ee 48 c7 c7 40 01 fc 85 e8 af 2e 40 ff 0f 0b 4c 89 ea
RSP: 0018:ffff8881cbdafce0 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff8881d1d09be0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81295a0d RDI: ffffed10397b5f8e
RBP: ffff8881d1d08240 R08: 0000000000000075 R09: fffffbfff1269caf
R10: fffffbfff1269cae R11: ffffffff8934e577 R12: ffffffff87a1ab40
R13: ffff8881d1d08000 R14: ffff8881d9a82300 R15: ffff8881db333c40
FS:  0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36c161b000 CR3: 00000001afd66000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_add include/linux/list.h:60 [inline]
 list_add_tail include/linux/list.h:93 [inline]
 em28xx_init_extension+0x44/0x1f0 drivers/media/usb/em28xx/em28xx-core.c:1125
 request_module_async+0x5d/0x70 drivers/media/usb/em28xx/em28xx-cards.c:3320
 process_one_work+0x945/0x15c0 kernel/workqueue.c:2264
 worker_thread+0x96/0xe20 kernel/workqueue.c:2410
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace cffa9e269918ce43 ]---
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 20 00 fc 85 e8 d4 2e 40 ff 0f 0b 48 89 f1 48 c7 c7 a0 ff fb 85 4c 89 e6 e8 c0 2e 40 ff <0f> 0b 48 89 ee 48 c7 c7 40 01 fc 85 e8 af 2e 40 ff 0f 0b 4c 89 ea
RSP: 0018:ffff8881cbdafce0 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff8881d1d09be0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81295a0d RDI: ffffed10397b5f8e
RBP: ffff8881d1d08240 R08: 0000000000000075 R09: fffffbfff1269caf
R10: fffffbfff1269cae R11: ffffffff8934e577 R12: ffffffff87a1ab40
R13: ffff8881d1d08000 R14: ffff8881d9a82300 R15: ffff8881db333c40
FS:  0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36c161b000 CR3: 00000001afd66000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400