------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci4
WARNING: kernel/workqueue.c:2437 at __queue_work+0xdfc/0x1360 kernel/workqueue.c:2436, CPU#1: syz.8.1699/11620
Modules linked in:
CPU: 1 UID: 0 PID: 11620 Comm: syz.8.1699 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:__queue_work+0xe1a/0x1360 kernel/workqueue.c:2436
Code: 28 78 01 00 00 4c 8d 35 a4 99 34 10 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 62 a2 b1 00 49 8b 77 18 4c 89 f7 48 8b 54 24 28 <67> 48 0f b9 3a 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8
RSP: 0018:ffffc90000a38be8 EFLAGS: 00010046
RAX: 1ffff1100b9eb95f RBX: dffffc0000000000 RCX: ffff888034efddc0
RDX: ffff88802b917178 RSI: ffffffff8b094b90 RDI: ffffffff91c3c8c0
RBP: 0000000000010000 R08: 0000000000000100 R09: 1ffffffff2381e57
R10: dffffc0000000000 R11: ffffffff818f3850 R12: ffff88802b9171c0
R13: 0000000000000008 R14: ffffffff91c3c8c0 R15: ffff88805cf5cae0
FS: 00007fa6df6ff6c0(0000) GS:ffff88812346a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa6de7ed200 CR3: 000000003334c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000008000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1749
expire_timers kernel/time/timer.c:1795 [inline]
__run_timers kernel/time/timer.c:2375 [inline]
__run_timer_base+0x67e/0x8b0 kernel/time/timer.c:2387
run_timer_base kernel/time/timer.c:2396 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2406
handle_softirqs+0x265/0x8d0 kernel/softirq.c:669
__do_softirq kernel/softirq.c:703 [inline]
invoke_softirq kernel/softirq.c:542 [inline]
__irq_exit_rcu+0xc6/0x220 kernel/softirq.c:786
irq_exit_rcu+0x9/0x30 kernel/softirq.c:809
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x9/0x350 kernel/locking/lockdep.c:5902
Code: 00 ff 0f 95 c0 e9 87 04 7a 0a cc 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 <41> 55 41 54 53 48 83 ec 58 4c 89 cb 45 89 c7 41 89 cd 89 54 24 04
RSP: 0018:ffffc9000252f3b8 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffffff818c3a80 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff9015a560
RBP: 1ffff920004a5e98 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000252f4d8 R11: ffffffff81b3df60 R12: dffffc0000000000
R13: ffffffff8178a98f R14: ffffc9000252f488 R15: 1ffff920004a5e91
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3f/0x90 mm/kasan/common.c:79
poison_kmalloc_redzone mm/kasan/common.c:412 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:429
kasan_kmalloc include/linux/kasan.h:267 [inline]
__kmalloc_cache_noprof+0x31c/0x600 mm/slub.c:5680
_kmalloc_noprof include/linux/slab.h:991 [inline]
slab_free_hook mm/slub.c:2732 [inline]
slab_free mm/slub.c:6637 [inline]
kmem_cache_free+0x158/0x660 mm/slub.c:6764
__io_req_caches_free+0x1be/0x270 io_uring/io_uring.c:2304
io_queue_deferred+0x82/0x540 io_uring/io_uring.c:503
__io_submit_flush_completions+0x13fa/0x1610 io_uring/io_uring.c:1294
io_submit_flush_completions io_uring/io_uring.h:254 [inline]
ctx_flush_and_put io_uring/tw.c:26 [inline]
tctx_task_work_run+0x987/0xd10 io_uring/tw.c:113
tctx_task_work+0x3f/0x60 io_uring/tw.c:133
task_work_run+0x1d9/0x260 kernel/task_work.c:233
get_signal+0x12d0/0x1430 kernel/signal.c:2885
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa6de79fb19
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:00007fa6df6fef38 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000001 RBX: 0000200000000b80 RCX: 00007fa6de79fb19
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000000d
RBP: 0000000000000223 R08: 0000000000000000 R09: 0000000000000008
R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000009a0
R13: 00002000000009a8 R14: 00000000000003c9 R15: 0000000000000001
----------------
Code disassembly (best guess):
0: 28 78 01 sub %bh,0x1(%rax)
3: 00 00 add %al,(%rax)
5: 4c 8d 35 a4 99 34 10 lea 0x103499a4(%rip),%r14 # 0x103499b0
c: 48 89 f8 mov %rdi,%rax
f: 48 c1 e8 03 shr $0x3,%rax
13: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1)
17: 74 05 je 0x1e
19: e8 62 a2 b1 00 call 0xb1a280
1e: 49 8b 77 18 mov 0x18(%r15),%rsi
22: 4c 89 f7 mov %r14,%rdi
25: 48 8b 54 24 28 mov 0x28(%rsp),%rdx
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 4c 89 f8 mov %r15,%rax
32: 48 c1 e8 03 shr $0x3,%rax
36: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1)
3a: 74 08 je 0x44
3c: 4c 89 ff mov %r15,%rdi
3f: e8 .byte 0xe8