loop3: detected capacity change from 0 to 264192 loop6: detected capacity change from 0 to 40 rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (0 ticks this GP) idle=84a4/1/0x4000000000000000 softirq=532651/532651 fqs=40193 rcu: (detected by 1, t=105002 jiffies, g=602809, q=41234 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 12751 Comm: syz-executor.0 Not tainted 6.13.0-rc3-next-20241220 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:apic_mem_wait_icr_idle+0xf/0x20 Code: 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 02 f3 90 8b 04 25 00 c3 5f ff c4 10 75 f2 e9 27 56 78 03 0f 1f 80 00 00 00 00 90 90 90 90 90 RSP: 0018:ffff88806ce092d0 EFLAGS: 00000006 RAX: 00000000000400f6 RBX: 0000000000000001 RCX: ffffffff812a35bc RDX: ffff88803e1e1bc0 RSI: ffffffff812a35c5 RDI: 00000000000400f6 RBP: 0000000000000001 R08: 0000000000000001 R09: ffffed100d9c124e R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88806ce3c7f0 R14: 0000000000000000 R15: ffff88806ce09388 FS: 00007f834a0f5700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556a215c58 CR3: 0000000018d8a000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_irq_work_raise+0x54/0x70 __irq_work_queue_local+0xb6/0x340 irq_work_queue_on+0x124/0x140 __rcu_read_unlock+0x3ee/0x4f0 perf_event_output_forward+0x16a/0x2c0 __perf_event_overflow+0x2b7/0xb40 perf_swevent_event+0x2c6/0x3f0 perf_tp_event+0x498/0xe80 perf_trace_run_bpf_submit+0xef/0x180 perf_trace_preemptirq_template+0x25a/0x430 trace_irq_enable.constprop.0+0xb6/0x110 trace_hardirqs_on+0x26/0x40 irqentry_exit+0x3b/0x90 asm_sysvec_irq_work+0x1a/0x20 RIP: 0010:__rcu_read_unlock+0xc6/0x4f0 Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 77 01 00 00 8b 85 00 04 00 00 85 c0 75 57 <65> 48 8b 1d 02 fb a8 7e 48 8d bb fc 03 00 00 48 b8 00 00 00 00 00 RSP: 0018:ffff88806ce099d8 EFLAGS: 00000206 RAX: 0000000000001544 RBX: ffff88806ce3c7c0 RCX: 1ffffffff0fe0c14 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff815aad2e RBP: ffffffff85c22a40 R08: 0000000000000001 R09: fffffbfff0fdfbe6 R10: ffffffff87efdf37 R11: 0000000000000003 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000200 R15: ffff88801600fde0 __is_insn_slot_addr+0x140/0x290 kernel_text_address+0x5b/0xc0 __kernel_text_address+0xd/0x40 unwind_get_return_address+0x59/0xa0 arch_stack_walk+0x9d/0xf0 stack_trace_save+0x8f/0xc0 kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3a/0x60 __kasan_slab_free+0x38/0x50 kmem_cache_free+0x138/0x470 rcu_core+0x7c9/0x17a0 handle_softirqs+0x1b1/0x770 __irq_exit_rcu+0xc4/0x100 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:_raw_spin_unlock_irqrestore+0x34/0x50 Code: c7 18 53 48 89 f3 48 8b 74 24 10 e8 f6 f1 a5 fc 48 89 ef e8 7e 60 a6 fc 80 e7 02 74 06 e8 b4 77 cf fc fb 65 ff 0d 54 5b 59 7b <74> 07 5b 5d e9 a3 1e 00 00 0f 1f 44 00 00 5b 5d e9 97 1e 00 00 0f RSP: 0018:ffff88803e017148 EFLAGS: 00000286 RAX: 000000000000152d RBX: 0000000000000216 RCX: 1ffffffff0fe0c14 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84aa4bac RBP: ffff88800941c608 R08: 0000000000000001 R09: fffffbfff0fdfbe6 R10: ffffffff87efdf37 R11: 0000000000000000 R12: 0000000000000216 R13: ffff88800941c608 R14: 0000000000000001 R15: ffff88800941c648 kthread_queue_work+0xa7/0x2e0 synchronize_rcu_expedited+0x2e6/0x420 unregister_netdevice_many_notify+0x1368/0x1890 unregister_netdevice_queue+0x224/0x2e0 ieee802154_if_remove+0x18c/0x260 ieee802154_add_iface+0x7e2/0x960 genl_family_rcv_msg_doit+0x1ff/0x2f0 genl_rcv_msg+0x534/0x7e0 netlink_rcv_skb+0x15d/0x450 genl_rcv+0x28/0x40 netlink_unicast+0x547/0x800 netlink_sendmsg+0x8a2/0xd80 ____sys_sendmsg+0xac5/0xc80 ___sys_sendmsg+0x110/0x1b0 __sys_sendmsg+0x151/0x200 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f834cb7fb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f834a0f5188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f834cc92f60 RCX: 00007f834cb7fb19 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000006 RBP: 00007f834cbd9f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc0dcf25cf R14: 00007f834a0f5300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 7: 00 00 00 a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: f3 0f 1e fa endbr64 1f: eb 02 jmp 0x23 21: f3 90 pause 23: 8b 04 25 00 c3 5f ff mov 0xffffffffff5fc300,%eax * 2a: f6 c4 10 test $0x10,%ah <-- trapping instruction 2d: 75 f2 jne 0x21 2f: e9 27 56 78 03 jmpq 0x378565b 34: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop