watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor.1:9517] Modules linked in: irq event stamp: 2176701 hardirqs last enabled at (2176700): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2176701): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2155300): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2155303): [] __irq_exit_rcu+0xc4/0x100 CPU: 0 UID: 0 PID: 9517 Comm: syz-executor.1 Not tainted 6.12.0-next-20241125 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x71/0x2490 Code: 00 00 00 fc ff df 49 8d 6f 58 48 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 07 1a 00 00 49 8b 47 58 4d 8d 6f 48 4c 89 ea 48 89 04 24 <48> c1 ea 03 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 d3 19 RSP: 0018:ffff88806ce09598 EFLAGS: 00000246 RAX: ffffffff833bbdab RBX: 0000000000000002 RCX: 0000000000000001 RDX: ffff88806ce09650 RSI: ffffffff833bbdab RDI: ffff88806ce09608 RBP: ffff88806ce09660 R08: 0000000000000001 R09: ffff88806ce09648 R10: 000000000003c001 R11: 0000000000095c01 R12: ffff88806ce096d0 R13: ffff88806ce09650 R14: ffff88803f881b80 R15: ffff88806ce09608 FS: 00007fd5033a9700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055558bf63c58 CR3: 000000003c554000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x87/0xf0 stack_trace_save+0x8f/0xc0 kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 __kasan_slab_alloc+0x59/0x70 kmem_cache_alloc_node_noprof+0x14c/0x3e0 kmalloc_reserve+0x189/0x2b0 __alloc_skb+0x162/0x370 skb_copy+0x1d5/0x3b0 mac80211_hwsim_tx_frame_no_nl.isra.0+0xafb/0x1320 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x546/0x950 __iterate_interfaces+0x2e0/0x650 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x1ab/0xa70 hrtimer_run_softirq+0x14c/0x310 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:put_cpu_partial+0x10a/0x1b0 Code: 24 28 75 5b 49 c7 44 24 28 00 00 00 00 4c 89 e7 48 8d 35 00 00 00 00 e8 e4 92 ab ff 4d 85 ed 74 06 e8 6a 5f d5 ff fb 4d 85 f6 <74> 1c 5b 4c 89 f6 48 89 ef 5d 41 5c 41 5d 41 5e e9 c1 fa ff ff 44 RSP: 0018:ffff88803ee5f070 EFLAGS: 00000246 RAX: 00000000002075e3 RBX: ffffea0000f159c0 RCX: 1ffffffff0fe00b6 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8184a5e6 RBP: ffff888008feedc0 R08: 0000000000000001 R09: fffffbfff0fddff1 R10: ffffffff87eeff8f R11: 00000000000007e0 R12: ffff88806ce41be0 R13: 0000000000000200 R14: 0000000000000000 R15: ffff88803c567af8 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19f/0x240 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 __alloc_object+0x2f/0x270 __create_object+0x1d/0x80 kmem_cache_alloc_noprof+0x300/0x3d0 __kernfs_new_node+0xd4/0x850 kernfs_new_node+0x18b/0x250 kernfs_create_dir_ns+0x4d/0x160 sysfs_create_dir_ns+0x12b/0x2a0 kobject_add_internal+0x24c/0x9a0 kobject_init_and_add+0x101/0x170 net_rx_queue_update_kobjects+0x279/0x570 netdev_register_kobject+0x26c/0x3b0 register_netdevice+0x1332/0x1ab0 register_netdev+0x31/0x60 sit_init_net+0x28b/0x5c0 ops_init+0x1e1/0x650 setup_net+0x1d7/0x7a0 copy_net_ns+0x2e3/0x6f0 create_new_namespaces+0x3f6/0xaf0 copy_namespaces+0x45c/0x580 copy_process+0x2704/0x8e90 kernel_clone+0xeb/0x850 __do_sys_clone3+0x1d9/0x260 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd505e75b19 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:00007fd5033a9188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007fd505f890e0 RCX: 00007fd505e75b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007fd505ecff6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffed7170edf R14: 00007fd5033a9300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.12.0-next-20241125 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:queued_spin_lock_slowpath+0xa2/0xb60 Code: 00 49 89 fe 49 89 fd 4c 8d 7c 24 38 bb 01 00 00 00 49 c1 ee 03 41 83 e5 07 48 b8 00 00 00 00 00 fc ff df 49 01 c6 41 83 c5 03 04 00 00 00 48 89 ef e8 11 de 04 fd 41 0f b6 06 41 38 c5 7c 08 RSP: 0018:ffff88806cf099e0 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff848722bf RDX: fffffbfff0c1b779 RSI: 0000000000000004 RDI: ffffffff860dbbc0 RBP: ffffffff860dbbc0 R08: 0000000000000000 R09: fffffbfff0c1b778 R10: ffffffff860dbbc3 R11: 5050505001000011 R12: 1ffff1100d9e133d R13: 0000000000000003 R14: fffffbfff0c1b778 R15: ffff88806cf09a18 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fd3612e978 CR3: 000000000ddc6000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: do_raw_spin_lock+0x1de/0x270 mac80211_hwsim_tx_frame_no_nl.isra.0+0x6d1/0x1320 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x546/0x950 __iterate_interfaces+0x2e0/0x650 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x1ab/0xa70 hrtimer_run_softirq+0x14c/0x310 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:default_idle+0x1e/0x30 Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 eb 0c 0f 1f 44 00 00 0f 00 2d e9 80 3d 00 0f 1f 44 00 00 fb f4 e9 7c 2e 02 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 RSP: 0018:ffff8880096cfe68 EFLAGS: 00000202 RAX: 00000000004063a1 RBX: 0000000000000001 RCX: ffffffff8484faf7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff812b10ea RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100d9e6cba R10: ffff88806cf365d3 R11: 0000000000000000 R12: ffffffff863f9d10 R13: 1ffff110012d9fd2 R14: 0000000000000000 R15: 0000000000000000 default_idle_call+0x6d/0xb0 do_idle+0x2fa/0x3b0 cpu_startup_entry+0x4f/0x60 start_secondary+0x1c1/0x220 common_startup_64+0x12c/0x138 ---------------- Code disassembly (best guess), 5 bytes skipped: 0: df 49 8d fisttps -0x73(%rcx) 3: 6f outsl %ds:(%rsi),(%dx) 4: 58 pop %rax 5: 48 89 ea mov %rbp,%rdx 8: 48 c1 ea 03 shr $0x3,%rdx c: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 10: 0f 85 07 1a 00 00 jne 0x1a1d 16: 49 8b 47 58 mov 0x58(%r15),%rax 1a: 4d 8d 6f 48 lea 0x48(%r15),%r13 1e: 4c 89 ea mov %r13,%rdx 21: 48 89 04 24 mov %rax,(%rsp) * 25: 48 c1 ea 03 shr $0x3,%rdx <-- trapping instruction 29: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 30: fc ff df 33: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 37: 0f .byte 0xf 38: 85 d3 test %edx,%ebx 3a: 19 .byte 0x19