------------[ cut here ]------------ workqueue: cannot queue hci_tx_work on wq hci1 WARNING: kernel/workqueue.c:2298 at __queue_work+0xd11/0xff0 kernel/workqueue.c:2297, CPU#0: syz.0.17993/10349 Modules linked in: CPU: 0 UID: 0 PID: 10349 Comm: syz.0.17993 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:__queue_work+0xd2e/0xff0 kernel/workqueue.c:2297 Code: 01 00 00 4c 89 f3 4c 8d 35 ef 57 a7 0e 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 4c 61 a4 00 49 8b 75 18 4c 89 f7 48 89 da <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef RSP: 0018:ffffc9000d0bf538 EFLAGS: 00010046 RAX: 1ffff1101444118a RBX: ffff888099e31970 RCX: 0000000000080000 RDX: ffff888099e31970 RSI: ffffffff8a99db90 RDI: ffffffff90344150 RBP: 0000000000000008 R08: ffff8880a2208c3f R09: 1ffff11014441187 R10: dffffc0000000000 R11: ffffed1014441188 R12: dffffc0000000000 R13: ffff8880a2208c38 R14: ffffffff90344150 R15: ffff88802ef4002c FS: 00007fb04578b6c0(0000) GS:ffff88812527c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000c038 CR3: 0000000096c64000 CR4: 00000000003526f0 Call Trace: queue_work_on+0x106/0x1d0 kernel/workqueue.c:2444 l2cap_chan_send+0x168a/0x22f0 net/bluetooth/l2cap_core.c:-1 l2cap_sock_sendmsg+0x33a/0x4d0 net/bluetooth/l2cap_sock.c:1179 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0x9b9/0xa20 net/socket.c:2684 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2738 __sys_sendmmsg+0x273/0x4d0 net/socket.c:2827 __do_sys_sendmmsg net/socket.c:2854 [inline] __se_sys_sendmmsg net/socket.c:2851 [inline] __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2851 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb04499ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb04578b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fb044c15fa0 RCX: 00007fb04499ce59 RDX: 000000000000ff80 RSI: 000020000000a440 RDI: 0000000000000004 RBP: 00007fb044a32e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb044c16038 R14: 00007fb044c15fa0 R15: 00007ffe0c5311a8 ---------------- Code disassembly (best guess): 0: 01 00 add %eax,(%rax) 2: 00 4c 89 f3 add %cl,-0xd(%rcx,%rcx,4) 6: 4c 8d 35 ef 57 a7 0e lea 0xea757ef(%rip),%r14 # 0xea757fc d: 48 89 f8 mov %rdi,%rax 10: 48 c1 e8 03 shr $0x3,%rax 14: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 19: 74 05 je 0x20 1b: e8 4c 61 a4 00 call 0xa4616c 20: 49 8b 75 18 mov 0x18(%r13),%rsi 24: 4c 89 f7 mov %r14,%rdi 27: 48 89 da mov %rbx,%rdx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 4c 89 e8 mov %r13,%rax 32: 48 c1 e8 03 shr $0x3,%rax 36: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 3b: 74 08 je 0x45 3d: 4c 89 ef mov %r13,%rdi