------------[ cut here ]------------ workqueue: cannot queue hci_cmd_timeout on wq hci1 WARNING: CPU: 1 PID: 5343 at kernel/workqueue.c:2257 __queue_work+0xc9c/0x10f0 kernel/workqueue.c:2256 Modules linked in: CPU: 1 UID: 0 PID: 5343 Comm: udevd Not tainted 6.15.0-rc5-syzkaller-00353-gcd802e7e5f1e #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+0xc9c/0x10f0 kernel/workqueue.c:2256 Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 28 04 00 00 48 8b 75 18 4c 89 f2 48 c7 c7 60 e3 8b 8b e8 05 22 f7 ff 90 <0f> 0b 90 90 e9 96 f7 ff ff e8 66 94 37 00 90 0f 0b 90 e9 1b f6 ff RSP: 0018:ffffc900006a0be8 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817abff8 RDX: ffff888031254880 RSI: ffffffff817ac005 RDI: 0000000000000001 RBP: ffff88804e0c0930 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff920000d418f R13: 0000000000000101 R14: ffff88802709e178 R15: 0000000000000001 FS: 00007fa5aab7c880(0000) GS:ffff8880d6ae1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcb37b2388 CR3: 000000002cc43000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> call_timer_fn+0x197/0x620 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1835 [inline] __run_timers+0x569/0x960 kernel/time/timer.c:2414 __run_timer_base kernel/time/timer.c:2426 [inline] __run_timer_base kernel/time/timer.c:2418 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2435 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2445 handle_softirqs+0x216/0x8e0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] RIP: 0010:rcu_is_watching+0x41/0xc0 kernel/rcu/tree.c:736 Code: a5 93 89 c5 83 f8 07 0f 87 82 00 00 00 48 8d 3c ed 00 dd ce 8d 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 5c 48 03 1c ed 00 dd ce 8d 48 b8 00 00 00 00 00 fc ff df 48 89 RSP: 0018:ffffc9000427fa18 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffffff93a51de8 RCX: 0000000000000002 RDX: 1ffffffff1b9dba1 RSI: ffffffff8bf483a0 RDI: ffffffff8dcedd08 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2cd/0x350 kernel/locking/lockdep.c:5829 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] kernfs_root+0x34/0x2a0 fs/kernfs/kernfs-internal.h:73 kernfs_root_is_locked fs/kernfs/kernfs-internal.h:107 [inline] kernfs_parent fs/kernfs/kernfs-internal.h:125 [inline] kernfs_dop_revalidate+0x4a0/0x740 fs/kernfs/dir.c:1184 d_revalidate fs/namei.c:929 [inline] d_revalidate fs/namei.c:925 [inline] lookup_fast+0x263/0x610 fs/namei.c:1778 walk_component+0x5b/0x5b0 fs/namei.c:2134 link_path_walk.part.0.constprop.0+0x685/0xd60 fs/namei.c:2503 link_path_walk fs/namei.c:2433 [inline] path_lookupat+0x91/0x780 fs/namei.c:2659 filename_lookup+0x224/0x5f0 fs/namei.c:2689 do_readlinkat+0xce/0x3a0 fs/stat.c:568 __do_sys_readlink fs/stat.c:605 [inline] __se_sys_readlink fs/stat.c:602 [inline] __x64_sys_readlink+0x78/0xc0 fs/stat.c:602 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa5aa5153a7 Code: 00 00 90 48 83 ec 10 48 63 ff 45 31 c9 45 31 c0 6a 00 31 c9 e8 8a 20 f9 ff 48 83 c4 18 c3 0f 1f 44 00 00 b8 59 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 21 ba 0d 00 f7 d8 64 89 02 48 RSP: 002b:00007ffcb37b77f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000059 RAX: ffffffffffffffda RBX: 00007ffcb37b7cd0 RCX: 00007fa5aa5153a7 RDX: 0000000000000400 RSI: 00007ffcb37b7800 RDI: 00007ffcb37b7cd0 RBP: 00007ffcb37b7800 R08: 000055f37017bfa0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000400 R13: 0000000000000100 R14: 000055f354512be0 R15: 00007ffcb37b8750 </TASK> ---------------- Code disassembly (best guess): 0: a5 movsl %ds:(%rsi),%es:(%rdi) 1: 93 xchg %eax,%ebx 2: 89 c5 mov %eax,%ebp 4: 83 f8 07 cmp $0x7,%eax 7: 0f 87 82 00 00 00 ja 0x8f d: 48 8d 3c ed 00 dd ce lea -0x72312300(,%rbp,8),%rdi 14: 8d 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 89 fa mov %rdi,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 2a: 75 5c jne 0x88 <-- trapping instruction 2c: 48 03 1c ed 00 dd ce add -0x72312300(,%rbp,8),%rbx 33: 8d 34: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3b: fc ff df 3e: 48 rex.W 3f: 89 .byte 0x89