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workqueue: cannot queue hci_conn_timeout on wq hci4
WARNING: kernel/workqueue.c:2298 at __queue_work+0xd3f/0x1040 kernel/workqueue.c:2296, CPU#0: udevd/4995
Modules linked in:
CPU: 0 UID: 0 PID: 4995 Comm: udevd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__queue_work+0xd67/0x1040 kernel/workqueue.c:2296
Code: a6 0e 49 8d 7d 18 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 ca c8 a3 00 49 8b 75 18 49 81 c7 70 01 00 00 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef
RSP: 0018:ffffc90000007bd8 EFLAGS: 00010082
RAX: 1ffff1100ecba94b RBX: 0000000000000008 RCX: ffff88807e845c40
RDX: ffff888049c13970 RSI: ffffffff8a9ea6c0 RDI: ffffffff9033da70
RBP: 0000000000000100 R08: ffffffff9030dbf7 R09: 1ffffffff2061b7e
R10: dffffc0000000000 R11: ffffffff818d38b0 R12: dffffc0000000000
R13: ffff8880765d4a40 R14: ffffffff9033da70 R15: ffff888049c13970
FS: 00007f5f435b3880(0000) GS:ffff888125287000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd9979cf52 CR3: 000000007f44e000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1794 [inline]
__run_timers kernel/time/timer.c:2374 [inline]
__run_timer_base+0x67e/0x8b0 kernel/time/timer.c:2386
run_timer_base kernel/time/timer.c:2395 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
handle_softirqs+0x22a/0x840 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:198
Code: f7 e8 ed 3a f6 f5 f7 c3 00 02 00 00 74 05 e8 50 d3 21 f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 a4 b9 e7 f5 65 8b 05 cd 7f 8d 07 85 c0 74 18 5b 41 5e c3 cc cc
RSP: 0018:ffffc900032ffdb0 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000296 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8dfad31b RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff9030dbf7 R09: 1ffffffff2061b7e
R10: dffffc0000000000 R11: fffffbfff2061b7f R12: ffff88807b0d98c0
R13: ffff88807b0d9800 R14: ffffffff9a655cc0 R15: 0000000000000001
__debug_check_no_obj_freed lib/debugobjects.c:1135 [inline]
debug_check_no_obj_freed+0x52e/0x550 lib/debugobjects.c:1156
slab_free_hook mm/slub.c:2620 [inline]
slab_free mm/slub.c:6251 [inline]
kmem_cache_free+0xfd/0x650 mm/slub.c:6378
free_filename fs/namei.c:147 [inline]
putname fs/namei.c:306 [inline]
class_filename_destructor include/linux/fs.h:2553 [inline]
__do_sys_unlink fs/namei.c:5604 [inline]
__se_sys_unlink+0xc2/0x140 fs/namei.c:5600
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0x560 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5f42f15937
Code: 00 00 e9 a9 fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 5f 00 00 00 0f 05 c3 0f 1f 84 00 00 00 00 00 b8 57 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 91 b4 0d 00 f7 d8 64 89 02 b8
RSP: 002b:00007ffd2cf20de8 EFLAGS: 00000202 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007f5f42f15937
RDX: 0000000000000000 RSI: 000000008c9b7bc0 RDI: 000055b665c3f02e
RBP: 0000000000000000 R08: 000000008ca9ac6f R09: 3fffffffffffffff
R10: 4000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 000055b665c5a100 R14: 0000000000000001 R15: 0000000000000000
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 49 8d 7d 18 lea 0x18(%r13),%rdi
4: 48 89 f8 mov %rdi,%rax
7: 48 c1 e8 03 shr $0x3,%rax
b: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
10: 74 05 je 0x17
12: e8 ca c8 a3 00 call 0xa3c8e1
17: 49 8b 75 18 mov 0x18(%r13),%rsi
1b: 49 81 c7 70 01 00 00 add $0x170,%r15
22: 4c 89 f7 mov %r14,%rdi
25: 4c 89 fa mov %r15,%rdx
* 28: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2d: 4c 89 e8 mov %r13,%rax
30: 48 c1 e8 03 shr $0x3,%rax
34: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
39: 74 08 je 0x43
3b: 4c 89 ef mov %r13,%rdi