------------[ cut here ]------------ workqueue: cannot queue hci_rx_work on wq hci0 WARNING: CPU: 0 PID: 5332 at kernel/workqueue.c:2258 __queue_work+0xdff/0x10a0 kernel/workqueue.c:2256 Modules linked in: CPU: 0 UID: 0 PID: 5332 Comm: syz.0.0 Not tainted 6.15.0-rc1-syzkaller-00301-g3bde70a2c827 #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+0xdff/0x10a0 kernel/workqueue.c:2256 Code: e8 03 80 3c 28 00 74 08 4c 89 ff e8 2b 65 a3 00 49 8b 37 49 81 c5 78 01 00 00 48 c7 c7 40 cf 49 8c 4c 89 ea e8 02 5f f8 ff 90 <0f> 0b 90 90 e9 5d f4 ff ff e8 73 3d 39 00 90 0f 0b 90 e9 a7 fc ff RSP: 0018:ffffc9000d4b7a68 EFLAGS: 00010046 RAX: 9310b370ffb7d200 RBX: ffff888000700000 RCX: 0000000000100000 RDX: ffffc9000f354000 RSI: 0000000000000a46 RDI: 0000000000000a47 RBP: dffffc0000000000 R08: ffffffff81827952 R09: 1ffff11003f847d2 R10: dffffc0000000000 R11: ffffed1003f847d3 R12: 1ffff11007ef5838 R13: ffff88803f7ac178 R14: 0000000000000008 R15: ffff8880523b0a98 FS: 00007f7ec4bd46c0(0000) GS:ffff88808c594000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7ec8770f20 CR3: 0000000043948000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: queue_work_on+0x1c4/0x380 kernel/workqueue.c:2392 queue_work include/linux/workqueue.h:662 [inline] hci_recv_frame+0x598/0x6f0 net/bluetooth/hci_core.c:2926 vhci_get_user drivers/bluetooth/hci_vhci.c:512 [inline] vhci_write+0x353/0x4a0 drivers/bluetooth/hci_vhci.c:608 new_sync_write fs/read_write.c:591 [inline] vfs_write+0x70f/0xd10 fs/read_write.c:684 ksys_write+0x19d/0x2d0 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7ec878bc1f 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:00007f7ec4bd4000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f7ec89a6160 RCX: 00007f7ec878bc1f RDX: 0000000000000007 RSI: 0000200000000040 RDI: 00000000000000ca RBP: 00007f7ec880e990 R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000040 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7ec89a6160 R15: 00007ffd7f32e478