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BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:199 [inline]
BUG: KASAN: use-after-free in __mutex_lock_common+0xd18/0x2678 kernel/locking/mutex.c:694
Read of size 8 at addr ffff0000deeec0a8 by task khidpd_0b570006/7111

CPU: 0 UID: 0 PID: 7111 Comm: khidpd_0b570006 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_address_description+0xa8/0x238 mm/kasan/report.c:378
 print_report+0x68/0x84 mm/kasan/report.c:482
 kasan_report+0xb0/0x110 mm/kasan/report.c:595
 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381
 __mutex_waiter_is_first kernel/locking/mutex.c:199 [inline]
 __mutex_lock_common+0xd18/0x2678 kernel/locking/mutex.c:694
 __mutex_lock kernel/locking/mutex.c:776 [inline]
 mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828
 l2cap_unregister_user+0x74/0x190 net/bluetooth/l2cap_core.c:1729
 hidp_session_thread+0x3d0/0x490 net/bluetooth/hidp/core.c:1304
 kthread+0x5fc/0x75c kernel/kthread.c:463
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff0000deeec000 pfn:0x11eeec
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffdffc3cdeb08 ffff00019bc03d40 0000000000000000
raw: ffff0000deeec000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000deeebf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000deeec000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff0000deeec080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                  ^
 ffff0000deeec100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000deeec180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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