list_del corruption. prev->next should be ffff888050ef0250, but was 000000113d0b3013. (prev=ffff888053b8c250) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:62! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 843 Comm: kworker/1:2 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: usb_hub_wq hub_event RIP: 0010:__list_del_entry_valid_or_report+0x17a/0x200 lib/list_debug.c:62 Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8d 00 00 00 48 8b 55 00 48 89 e9 48 89 de 48 c7 c7 20 e7 f1 8b e8 27 03 e8 fc 90 <0f> 0b 4c 89 e7 e8 3c f8 4d fd 48 89 ea 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffffc9000564f660 EFLAGS: 00010282 RAX: 000000000000006d RBX: ffff888050ef0250 RCX: ffffffff819b9f09 RDX: 0000000000000000 RSI: ffffffff819c1a36 RDI: 0000000000000005 RBP: ffff888053b8c250 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000001 R12: ffff888054710250 R13: ffff888050ef0000 R14: ffffffff8fb83fe8 R15: ffffed100a1de44b FS: 0000000000000000(0000) GS:ffff8880d6ad9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000564049bbc520 CR3: 00000000341d6000 CR4: 0000000000352ef0 Call Trace: __list_del_entry_valid include/linux/list.h:132 [inline] __list_del_entry include/linux/list.h:223 [inline] list_del include/linux/list.h:237 [inline] em28xx_close_extension+0x10b/0x2b0 drivers/media/usb/em28xx/em28xx-core.c:1137 em28xx_usb_disconnect+0x19d/0x610 drivers/media/usb/em28xx/em28xx-cards.c:4197 usb_unbind_interface+0x1dd/0x9e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:571 [inline] device_remove+0x125/0x170 drivers/base/dd.c:563 __device_release_driver drivers/base/dd.c:1274 [inline] device_release_driver_internal+0x44b/0x620 drivers/base/dd.c:1297 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579 device_del+0x396/0x9f0 drivers/base/core.c:3878 usb_disable_device+0x355/0x7d0 drivers/usb/core/message.c:1418 usb_disconnect+0x2e1/0x9c0 drivers/usb/core/hub.c:2344 hub_port_connect drivers/usb/core/hub.c:5406 [inline] hub_port_connect_change drivers/usb/core/hub.c:5706 [inline] port_event drivers/usb/core/hub.c:5870 [inline] hub_event+0x1c81/0x4fe0 drivers/usb/core/hub.c:5952 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0x17a/0x200 lib/list_debug.c:62 Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8d 00 00 00 48 8b 55 00 48 89 e9 48 89 de 48 c7 c7 20 e7 f1 8b e8 27 03 e8 fc 90 <0f> 0b 4c 89 e7 e8 3c f8 4d fd 48 89 ea 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffffc9000564f660 EFLAGS: 00010282 RAX: 000000000000006d RBX: ffff888050ef0250 RCX: ffffffff819b9f09 RDX: 0000000000000000 RSI: ffffffff819c1a36 RDI: 0000000000000005 RBP: ffff888053b8c250 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000001 R12: ffff888054710250 R13: ffff888050ef0000 R14: ffffffff8fb83fe8 R15: ffffed100a1de44b FS: 0000000000000000(0000) GS:ffff8880d6ad9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055558a919808 CR3: 00000000341d6000 CR4: 0000000000352ef0