WARNING: CPU: 1 PID: 5224 at lib/refcount.c:25 refcount_warn_saturate+0x1ca/0x210 lib/refcount.c:25 Modules linked in: CPU: 1 PID: 5224 Comm: kworker/u33:4 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: hci3 hci_error_reset RIP: 0010:refcount_warn_saturate+0x1ca/0x210 lib/refcount.c:25 Code: ff 89 de e8 18 97 0a fd 84 db 0f 85 e6 fe ff ff e8 6b 9c 0a fd c6 05 8c ac 4a 0b 01 90 48 c7 c7 20 a3 8f 8b e8 d7 b5 cc fc 90 <0f> 0b 90 90 e9 c3 fe ff ff e8 48 9c 0a fd c6 05 67 ac 4a 0b 01 90 RSP: 0018:ffffc900037dfc40 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81500069 RDX: ffff888024faa440 RSI: ffffffff81500076 RDI: 0000000000000001 RBP: ffff8880453c1310 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000002 R12: ffff8880453c1310 R13: ffff8880453c12d8 R14: 0000000000000000 R15: ffff88802519c400 FS: 0000000000000000(0000) GS:ffff88806b100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c001fef4b8 CR3: 0000000027e98000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __refcount_add include/linux/refcount.h:190 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] kref_get include/linux/kref.h:45 [inline] kobject_get+0x135/0x150 lib/kobject.c:643 get_device+0x22/0x40 drivers/base/core.c:3817 hci_dev_hold include/net/bluetooth/hci_core.h:1599 [inline] hci_error_reset+0x38/0x320 net/bluetooth/hci_core.c:1079 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244