watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.2.3979:24907] Modules linked in: irq event stamp: 13492177 hardirqs last enabled at (13492176): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (13492177): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (9636994): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (9636994): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (9636994): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (9636997): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (9636997): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (9636997): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 24907 Comm: syz.2.3979 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:ieee80211_rx_list+0x2bb9/0x3710 net/mac80211/rx.c:5595 Code: f8 f8 f8 f8 f8 f8 4a 89 4c 28 04 66 42 c7 44 28 0c f8 f8 42 c6 44 28 0e f8 e8 e3 55 ac f6 48 c7 84 24 e0 00 00 00 0e 36 e0 45 <48> 8b 84 24 98 00 00 00 4a c7 04 28 00 00 00 00 4a c7 44 28 08 00 RSP: 0018:ffffc90000007b60 EFLAGS: 00000286 RAX: 0000000000000006 RBX: ffff88801f292910 RCX: 0000000000000101 RDX: 0000000000000003 RSI: ffffffff8deec7f5 RDI: ffffffff8c278880 RBP: ffffc90000007db0 R08: ffffffff90111eb7 R09: 1ffffffff20223d6 R10: dffffc0000000000 R11: fffffbfff20223d7 R12: ffff888093bdd000 R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88806fd4cdc0 FS: 00007fa86c3a76c0(0000) GS:ffff888125496000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c362425 CR3: 000000006fa08000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: ieee80211_rx_napi+0x1b1/0x3e0 net/mac80211/rx.c:5611 ieee80211_rx include/net/mac80211.h:5267 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__preempt_count_sub arch/x86/include/asm/preempt.h:85 [inline] RIP: 0010:preempt_schedule_common+0x89/0xd0 kernel/sched/core.c:7093 Code: 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 9b 37 8c f6 49 89 1e bf 01 00 00 00 e8 2e a8 ff ff 65 8b 05 f7 ac 76 07 <65> ff 0d f0 ac 76 07 65 48 8b 1d c0 ac 76 07 48 89 d8 48 c1 e8 03 RSP: 0018:ffffc9000b6a76a8 EFLAGS: 00000246 RAX: 0000000080000001 RBX: ffffffff8133aaf6 RCX: 0000000080000002 RDX: 0000000000000000 RSI: ffffffff8c278860 RDI: ffffffff8c278820 RBP: ffffc9000b6a7710 R08: ffffffff90111eb7 R09: 1ffffffff20223d6 R10: dffffc0000000000 R11: fffffbfff20223d7 R12: ffffffff8e765fe0 R13: ffffffff8e765f00 R14: ffff888026a51508 R15: dffffc0000000000 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline] _raw_spin_unlock_irqrestore+0x74/0x80 kernel/locking/spinlock.c:194 rcu_preempt_deferred_qs_irqrestore+0x7b9/0xbc0 kernel/rcu/tree_plugin.h:-1 __rcu_read_unlock+0x83/0xe0 kernel/rcu/tree_plugin.h:438 rcu_read_unlock include/linux/rcupdate.h:883 [inline] class_rcu_destructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0x1aaf/0x23c0 arch/x86/kernel/unwind_orc.c:695 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 save_stack+0x122/0x230 mm/page_owner.c:165 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320 reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1432 [inline] __free_frozen_pages+0xc00/0xd90 mm/page_alloc.c:2977 __slab_free+0x263/0x2b0 mm/slub.c:5490 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4459 [inline] slab_alloc_node mm/slub.c:4788 [inline] kmem_cache_alloc_lru_noprof+0x2b8/0x640 mm/slub.c:4807 sock_alloc_inode+0x28/0xc0 net/socket.c:322 alloc_inode+0x6a/0x1b0 fs/inode.c:347 new_inode_pseudo include/linux/fs.h:2993 [inline] sock_alloc net/socket.c:637 [inline] __sock_create+0x12d/0x9d0 net/socket.c:1569 sock_create net/socket.c:1663 [inline] __sys_socket_create net/socket.c:1700 [inline] __sys_socket+0xd6/0x1b0 net/socket.c:1747 __do_sys_socket net/socket.c:1761 [inline] __se_sys_socket net/socket.c:1759 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1759 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa86b59bf79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa86c3a7028 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007fa86b815fa0 RCX: 00007fa86b59bf79 RDX: 0000000000000010 RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007fa86b6327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa86b816038 R14: 00007fa86b815fa0 R15: 00007ffdcf554f98 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 24919 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xcf8/0x1270 kernel/smp.c:877 Code: e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 cf d5 0b 00 eb 38 f3 90 42 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e b3 d5 0b 00 eb e4 44 89 e1 80 e1 07 80 c1 03 38 c1 7c e2 4c 89 RSP: 0018:ffffc900038ef720 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 1ffff110170c84d5 RCX: ffff88803dd18000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900038ef860 R08: ffffffff90111eb7 R09: 1ffffffff20223d6 R10: dffffc0000000000 R11: fffffbfff20223d7 R12: ffff8880b86426a8 R13: dffffc0000000000 R14: ffff8880b873bd80 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125596000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8aec519e80 CR3: 000000000e54c000 CR4: 00000000003526f0 DR0: 0000000000000004 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043 on_each_cpu include/linux/smp.h:72 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2746 [inline] smp_text_poke_batch_finish+0x5f5/0x1160 arch/x86/kernel/alternative.c:2956 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_disable_cpuslocked+0xc5/0x1a0 kernel/jump_label.c:240 static_key_disable+0x1a/0x20 kernel/jump_label.c:248 toggle_allocation_gate+0x1fe/0x290 mm/kfence/core.c:906 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3358 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245