watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.4:136224] Modules linked in: irq event stamp: 105927 hardirqs last enabled at (105926): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (105927): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (105704): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (105707): [] __irq_exit_rcu+0xc4/0x100 CPU: 1 UID: 0 PID: 136224 Comm: syz-executor.4 Not tainted 6.16.0-next-20250808 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:lock_acquire+0x5b/0x2f0 Code: 30 31 c0 eb 4b 65 8b 05 a7 10 32 06 89 c0 48 0f a3 05 b9 fa f1 04 0f 82 3a 01 00 00 8b 35 a1 06 f2 04 85 f6 0f 85 84 00 00 00 <48> 8b 44 24 30 65 48 2b 05 50 10 32 06 0f 85 6e 02 00 00 48 83 c4 RSP: 0018:ffff88806cf07b68 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 0000000000000000 RCX: d3777d93517b484d RDX: 000000001f2fab50 RSI: 00000000218dc892 RDI: 00000000e1715126 RBP: ffffffff85c1b860 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000200 FS: 00007fc968cee700(0000) GS:ffff8880e56e6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005586d8f85618 CR3: 000000004351b000 CR4: 0000000000350ef0 Call Trace: unwind_next_frame+0xcd/0x2540 __unwind_start+0x517/0x7c0 perf_callchain_kernel+0x28b/0x620 get_perf_callchain+0x179/0x6c0 perf_callchain+0x1a6/0x240 perf_prepare_sample+0xd15/0x21f0 perf_event_output_forward+0xd2/0x2c0 __perf_event_overflow+0x2c5/0xc50 perf_swevent_event+0x2c6/0x3f0 perf_tp_event+0x497/0xe70 perf_trace_run_bpf_submit+0xef/0x180 perf_trace_lock_acquire+0x3c2/0x700 lock_acquire+0xc5/0x2f0 unwind_next_frame+0xcd/0x2540 arch_stack_walk+0x86/0xf0 stack_trace_save+0x8e/0xc0 kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 __kasan_slab_alloc+0x59/0x70 kmem_cache_alloc_node_noprof+0x14b/0x3e0 kmalloc_reserve+0x189/0x2b0 __alloc_skb+0x161/0x370 __netdev_alloc_skb+0x1eb/0x7c0 __ieee80211_beacon_get+0x3a6/0x16e0 ieee80211_beacon_get_tim+0xa5/0x280 mac80211_hwsim_beacon_tx+0x49b/0x940 __iterate_interfaces+0x2e0/0x650 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x1ee/0xac0 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:_raw_spin_unlock_irqrestore+0x34/0x50 Code: c7 18 53 48 89 f3 48 8b 74 24 10 e8 e6 29 95 fc 48 89 ef e8 1e 75 95 fc 80 e7 02 74 06 e8 b4 87 bf fc fb 65 ff 0d fc 3d c7 02 <74> 07 5b 5d e9 03 1f 00 00 0f 1f 44 00 00 5b 5d e9 f7 1e 00 00 0f RSP: 0018:ffff88805a83f4c8 EFLAGS: 00000246 RAX: 0000000000019aad RBX: 0000000000000256 RCX: 0000000000000080 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84bc622c RBP: ffff888008ce8a80 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff86438a57 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88805a83f518 R14: ffff88803c6f5280 R15: ffff88803c6f5280 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19f/0x240 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x13c/0x3d0 security_inode_alloc+0x3e/0x130 inode_init_always_gfp+0xc94/0xff0 alloc_inode+0x8d/0x250 new_inode+0x1e/0x160 __ext4_new_inode+0x35d/0x4d70 ext4_create+0x2e2/0x4e0 lookup_open.isra.0+0x10f8/0x1530 path_openat+0xc26/0x2880 do_filp_open+0x1e8/0x450 do_sys_openat2+0x104/0x1b0 __x64_sys_openat+0x142/0x200 do_syscall_64+0xbf/0x360 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc96b778b19 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:00007fc968cee188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fc96b88bf60 RCX: 00007fc96b778b19 RDX: 0000000000000042 RSI: 0000000020000100 RDI: ffffffffffffff9c RBP: 00007fc96b7d2f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdff3c329f R14: 00007fc968cee300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.16.0-next-20250808 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 Code: f6 e6 b9 03 e9 01 06 00 00 90 f3 0f 1e fa 0f 01 ca fc 6a ff e8 b1 04 00 00 48 89 c4 48 89 e7 e8 46 e6 b9 03 e9 e1 05 00 00 90 0f 1e fa 0f 01 ca fc 6a ff e8 91 04 00 00 48 89 c4 48 89 e7 e8 RSP: 0018:ffffffff85a07dd8 EFLAGS: 00000002 RAX: 0000000000bae4e3 RBX: 0000000000000000 RCX: ffffffff84ba1167 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff814c3654 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100d9c630a R10: ffff88806ce31853 R11: 0000000000000001 R12: ffffffff86438a50 R13: 1ffffffff0b40fc7 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880e55e6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005586d8fa58e8 CR3: 000000001d819000 CR4: 0000000000350ef0 Call Trace: RIP: 0010:pv_native_safe_halt+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 c9 79 0b 00 0f 1f 44 00 00 fb f4 9d 82 02 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 RSP: 0018:ffffffff85a07e00 EFLAGS: 00000202 default_idle+0xe/0x20 default_idle_call+0x6d/0xb0 do_idle+0x344/0x490 cpu_startup_entry+0x4f/0x60 rest_init+0x164/0x290 start_kernel+0x3f9/0x510 x86_64_start_reservations+0x18/0x30 x86_64_start_kernel+0x109/0x120 common_startup_64+0x13e/0x148 ---------------- Code disassembly (best guess): 0: 30 31 xor %dh,(%rcx) 2: c0 eb 4b shr $0x4b,%bl 5: 65 8b 05 a7 10 32 06 mov %gs:0x63210a7(%rip),%eax # 0x63210b3 c: 89 c0 mov %eax,%eax e: 48 0f a3 05 b9 fa f1 bt %rax,0x4f1fab9(%rip) # 0x4f1facf 15: 04 16: 0f 82 3a 01 00 00 jb 0x156 1c: 8b 35 a1 06 f2 04 mov 0x4f206a1(%rip),%esi # 0x4f206c3 22: 85 f6 test %esi,%esi 24: 0f 85 84 00 00 00 jne 0xae * 2a: 48 8b 44 24 30 mov 0x30(%rsp),%rax <-- trapping instruction 2f: 65 48 2b 05 50 10 32 sub %gs:0x6321050(%rip),%rax # 0x6321087 36: 06 37: 0f 85 6e 02 00 00 jne 0x2ab 3d: 48 rex.W 3e: 83 .byte 0x83 3f: c4 .byte 0xc4