Bluetooth: hci0: command 0x0c1a tx timeout
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BUG: KASAN: use-after-free in __queue_work+0xdff/0x1100 kernel/workqueue.c:1383
Read of size 4 at addr ffff888099c50400 by task kworker/1:3/15266

CPU: 1 PID: 15266 Comm: kworker/1:3 Not tainted 4.19.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events hci_cmd_timeout
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load4_noabort+0x88/0x90 mm/kasan/report.c:432
 __queue_work+0xdff/0x1100 kernel/workqueue.c:1383
 queue_work_on+0x17e/0x1f0 kernel/workqueue.c:1488
 process_one_work+0x864/0x1570 kernel/workqueue.c:2155
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
 kthread+0x30b/0x410 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Allocated by task 3727:
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc+0x15a/0x3c0 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 __alloc_workqueue_key+0x789/0xed0 kernel/workqueue.c:4087
 hci_register_dev+0x1bf/0x870 net/bluetooth/hci_core.c:3179
 __vhci_create_device+0x2b5/0x580 drivers/bluetooth/hci_vhci.c:139
 vhci_create_device drivers/bluetooth/hci_vhci.c:163 [inline]
 vhci_open_timeout+0x35/0x50 drivers/bluetooth/hci_vhci.c:319
 process_one_work+0x864/0x1570 kernel/workqueue.c:2155
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
 kthread+0x30b/0x410 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Freed by task 16312:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 __rcu_reclaim kernel/rcu/rcu.h:236 [inline]
 rcu_do_batch kernel/rcu/tree.c:2584 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline]
 rcu_process_callbacks+0x8ff/0x18b0 kernel/rcu/tree.c:2881
 __do_softirq+0x26c/0x9a0 kernel/softirq.c:292

The buggy address belongs to the object at ffff888099c50280
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 384 bytes inside of
 512-byte region [ffff888099c50280, ffff888099c50480)
The buggy address belongs to the page:
page:ffffea0002671400 count:1 mapcount:0 mapping:ffff88812c39c940 index:0x0
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffffea000292e548 ffffea00024a07c8 ffff88812c39c940
raw: 0000000000000000 ffff888099c50000 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888099c50300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888099c50380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888099c50400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888099c50480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888099c50500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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