em28xx 1-1:0.240: Audio interface 240 found (Vendor Class)
em28xx 1-1:0.240: unknown em28xx chip ID (0)
em28xx 1-1:0.240: Config register raw data: 0xfffffffb
em28xx 1-1:0.240: AC97 chip type couldn't be determined
em28xx 1-1:0.240: No AC97 audio processor
==================================================================
BUG: KASAN: use-after-free in __list_add_valid+0xd8/0xf0 lib/list_debug.c:26
Read of size 8 at addr ffff8881d31d0240 by task kworker/1:1/21

CPU: 1 PID: 21 Comm: kworker/1:1 Not tainted 5.3.0+ #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:77 [inline]
 dump_stack+0xca/0x13e lib/dump_stack.c:113
 print_address_description+0x6a/0x32c mm/kasan/report.c:351
 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482
 kasan_report+0xe/0x12 mm/kasan/common.c:618
 __list_add_valid+0xd8/0xf0 lib/list_debug.c:26
 __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
 em28xx_init_dev.isra.0+0xa7b/0x15d8 drivers/media/usb/em28xx/em28xx-cards.c:3520
 em28xx_usb_probe.cold+0xcac/0x2516 drivers/media/usb/em28xx/em28xx-cards.c:3869
 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361
 really_probe+0x281/0x6d0 drivers/base/dd.c:548
 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430
 __device_attach+0x217/0x360 drivers/base/dd.c:894
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490
 device_add+0xae6/0x16f0 drivers/base/core.c:2201
 usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023
 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210
 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266
 really_probe+0x281/0x6d0 drivers/base/dd.c:548
 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430
 __device_attach+0x217/0x360 drivers/base/dd.c:894
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490
 device_add+0xae6/0x16f0 drivers/base/core.c:2201
 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536
 hub_port_connect drivers/usb/core/hub.c:5098 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5213 [inline]
 port_event drivers/usb/core/hub.c:5359 [inline]
 hub_event+0x1b5c/0x3640 drivers/usb/core/hub.c:5441
 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Allocated by task 238:
 save_stack+0x1b/0x80 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc mm/kasan/common.c:493 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:466
 slab_post_alloc_hook mm/slab.h:520 [inline]
 slab_alloc_node mm/slub.c:2770 [inline]
 slab_alloc mm/slub.c:2778 [inline]
 kmem_cache_alloc+0xd6/0x2d0 mm/slub.c:2783
 shmem_alloc_inode+0x18/0x40 mm/shmem.c:3630
 alloc_inode+0x61/0x1e0 fs/inode.c:227
 new_inode_pseudo+0x14/0xe0 fs/inode.c:916
 new_inode+0x1b/0x40 fs/inode.c:945
 shmem_get_inode+0x84/0x7e0 mm/shmem.c:2228
 shmem_mknod+0x5a/0x1f0 mm/shmem.c:2864
 lookup_open+0x119a/0x18d0 fs/namei.c:3224
 do_last fs/namei.c:3314 [inline]
 path_openat+0x1045/0x3f50 fs/namei.c:3525
 do_filp_open+0x1a1/0x280 fs/namei.c:3555
 do_sys_open+0x3c0/0x580 fs/open.c:1089
 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 0:
 save_stack+0x1b/0x80 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_slab_free+0x130/0x180 mm/kasan/common.c:455
 slab_free_hook mm/slub.c:1423 [inline]
 slab_free_freelist_hook mm/slub.c:1474 [inline]
 slab_free mm/slub.c:3016 [inline]
 kmem_cache_free+0xb9/0x380 mm/slub.c:3032
 i_callback+0x3f/0x70 fs/inode.c:216
 __rcu_reclaim kernel/rcu/rcu.h:222 [inline]
 rcu_do_batch kernel/rcu/tree.c:2157 [inline]
 rcu_core+0x630/0x1ca0 kernel/rcu/tree.c:2377
 __do_softirq+0x221/0x912 kernel/softirq.c:292

The buggy address belongs to the object at ffff8881d31d0000
 which belongs to the cache shmem_inode_cache of size 1184
The buggy address is located 576 bytes inside of
 1184-byte region [ffff8881d31d0000, ffff8881d31d04a0)
The buggy address belongs to the page:
page:ffffea00074c7400 refcount:1 mapcount:0 mapping:ffff8881da115180 index:0x0 compound_mapcount: 0
flags: 0x200000000010200(slab|head)
raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da115180
raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881d31d0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881d31d0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881d31d0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff8881d31d0280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881d31d0300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================