------------[ cut here ]------------ workqueue: cannot queue hci_rx_work on wq hci0 WARNING: CPU: 0 PID: 5316 at kernel/workqueue.c:2258 __queue_work+0xd62/0xfe0 kernel/workqueue.c:2256 Modules linked in: CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted 6.15.0-rc4-syzkaller-00052-g4f79eaa2ceac #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__queue_work+0xd62/0xfe0 kernel/workqueue.c:2256 Code: 42 80 3c 20 00 74 08 4c 89 ef e8 69 d9 96 00 49 8b 75 00 49 81 c7 78 01 00 00 48 c7 c7 e0 c7 69 8b 4c 89 fa e8 9f 40 f9 ff 90 <0f> 0b 90 90 e9 f1 f4 ff ff e8 40 e4 34 00 90 0f 0b 90 e9 dd fc ff RSP: 0018:ffffc9000d20fa88 EFLAGS: 00010046 RAX: ad62ea304df45500 RBX: 0000000000000000 RCX: ffff88801f1d8000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 1ffff110085cad38 R08: ffff88801fe23e93 R09: 1ffff11003fc47d2 R10: dffffc0000000000 R11: ffffed1003fc47d3 R12: dffffc0000000000 R13: ffff888042e90a98 R14: ffff88801f1d8000 R15: ffff888042e56978 FS: 00007fed959246c0(0000) GS:ffff88808d6cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fed90ff4fc8 CR3: 0000000041fd8000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: queue_work_on+0x181/0x270 kernel/workqueue.c:2392 queue_work include/linux/workqueue.h:662 [inline] hci_recv_frame+0x5ad/0x700 net/bluetooth/hci_core.c:2926 vhci_get_user drivers/bluetooth/hci_vhci.c:512 [inline] vhci_write+0x358/0x4a0 drivers/bluetooth/hci_vhci.c:608 new_sync_write fs/read_write.c:591 [inline] vfs_write+0x548/0xa90 fs/read_write.c:684 ksys_write+0x145/0x250 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fed94b8d41f Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48 RSP: 002b:00007fed95924000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fed94db6080 RCX: 00007fed94b8d41f RDX: 0000000000000022 RSI: 0000200000000280 RDI: 00000000000000ca RBP: 00007fed94c10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000280 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fed94db6080 R15: 00007ffd74092e88