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BUG: KASAN: use-after-free in __list_del_entry_valid+0xe0/0xf0 lib/list_debug.c:51
Read of size 8 at addr ffff888023a9c250 by task kworker/0:1/7

CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.12.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x93/0xc2 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:232
 __kasan_report mm/kasan/report.c:399 [inline]
 kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416
 __list_del_entry_valid+0xe0/0xf0 lib/list_debug.c:51
 __list_del_entry include/linux/list.h:132 [inline]
 list_del include/linux/list.h:146 [inline]
 em28xx_close_extension+0xd8/0x260 drivers/media/usb/em28xx/em28xx-core.c:1146
 em28xx_usb_disconnect.cold+0x13c/0x211 drivers/media/usb/em28xx/em28xx-cards.c:4136
 usb_unbind_interface+0x183/0x7e0 drivers/usb/core/driver.c:458
 __device_release_driver+0x32f/0x660 drivers/base/dd.c:1156
 device_release_driver_internal drivers/base/dd.c:1187 [inline]
 device_release_driver+0x21/0x30 drivers/base/dd.c:1210
 bus_remove_device+0x298/0x550 drivers/base/bus.c:533
 device_del+0x494/0xc10 drivers/base/core.c:3421
 usb_disable_device+0x29c/0x660 drivers/usb/core/message.c:1413
 usb_disconnect.cold+0x20c/0x681 drivers/usb/core/hub.c:2218
 hub_port_connect drivers/usb/core/hub.c:5074 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
 port_event drivers/usb/core/hub.c:5509 [inline]
 hub_event+0xb22/0x36b0 drivers/usb/core/hub.c:5591
 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275
 process_scheduled_works kernel/workqueue.c:2337 [inline]
 worker_thread+0x733/0xf80 kernel/workqueue.c:2423
 kthread+0x36f/0x450 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

The buggy address belongs to the page:
page:00000000cf31c036 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x0 pfn:0x23a9c
flags: 0xfff00000000000()
raw: 00fff00000000000 ffffea0000edcc08 ffff88813fffb910 0000000000000000
raw: 0000000000000000 0000000000000002 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888023a9c100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888023a9c180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888023a9c200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                 ^
 ffff888023a9c280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888023a9c300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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