watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz.1.11127:14234] Modules linked in: irq event stamp: 10453627 hardirqs last enabled at (10453626): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (10453627): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (156966): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (156966): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (156966): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (156969): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (156969): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (156969): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 14234 Comm: syz.1.11127 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:stack_trace_consume_entry+0xf3/0x280 kernel/stacktrace.c:93 Code: 8b 74 24 08 48 8b 1f 45 8d 79 01 0f b6 44 15 00 84 c0 0f 85 3a 01 00 00 45 89 38 4e 8d 3c cb 4c 89 f8 48 c1 e8 03 80 3c 10 00 <74> 1a 4c 89 ff 48 89 f3 49 89 d4 4c 89 c5 e8 2a 35 7f 00 49 89 e8 RSP: 0018:ffffc90000006e78 EFLAGS: 00000246 RAX: 1ffff92000000e0a RBX: ffffc90000007010 RCX: 0000000000000100 RDX: dffffc0000000000 RSI: ffffffff8b24ed85 RDI: ffffc90000006f80 RBP: 1ffff92000000df2 R08: ffffc90000006f90 R09: 0000000000000008 R10: ffffc90000006ba0 R11: ffffffff81b0bfa0 R12: 0000000000000000 R13: 1ffff92000000df1 R14: ffffc90000006f88 R15: ffffc90000007050 FS: 00007f79b31986c0(0000) GS:ffff888125463000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000067a36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 000000000011060a Call Trace: arch_stack_walk+0x10f/0x150 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5263 [inline] __kmalloc_noprof+0x35c/0x760 mm/slub.c:5275 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] cfg80211_inform_single_bss_data+0x952/0x1b70 net/wireless/scan.c:2344 cfg80211_inform_bss_data+0x266/0x3c40 net/wireless/scan.c:3226 cfg80211_inform_bss_frame_data+0x3c7/0x760 net/wireless/scan.c:3317 ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230 ieee80211_scan_rx+0x552/0xa40 net/mac80211/scan.c:364 __ieee80211_rx_handle_packet net/mac80211/rx.c:5305 [inline] ieee80211_rx_list+0x29e5/0x3710 net/mac80211/rx.c:5588 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/0x870 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:check_kcov_mode kernel/kcov.c:185 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x30/0x70 kernel/kcov.c:217 Code: 04 24 65 48 8b 0d 48 32 56 11 65 8b 15 69 32 56 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 94 16 00 00 00 74 2c <8b> 91 70 16 00 00 83 fa 02 75 21 48 8b 91 78 16 00 00 48 8b 32 48 RSP: 0018:ffffc900033274c8 EFLAGS: 00000246 RAX: ffffffff81862f26 RBX: ffff8880b049bd00 RCX: ffff888046ec5b80 RDX: 0000000000000000 RSI: 0000000000000080 RDI: ffff888054f1bd80 RBP: 0000000000000080 R08: ffff8880b049d563 R09: 1ffff11016093aac R10: dffffc0000000000 R11: ffffed1016093aad R12: dffffc0000000000 R13: 1ffff11016093aab R14: ffff8880b049d558 R15: ffff888054f1bd80 try_release_thread_stack_to_cache+0x16/0x250 kernel/fork.c:240 free_thread_stack kernel/fork.c:379 [inline] release_task_stack kernel/fork.c:518 [inline] put_task_stack+0xab/0x1c0 kernel/fork.c:525 finish_task_switch+0x4b7/0x920 kernel/sched/core.c:5193 context_switch kernel/sched/core.c:5298 [inline] __schedule+0x15e5/0x52d0 kernel/sched/core.c:6908 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7235 irqentry_exit+0x599/0x620 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:kfence_guarded_alloc+0x8f6/0xc10 mm/kfence/core.c:506 Code: 01 00 00 31 ff e8 4a 6b 95 ff 41 81 e7 00 01 00 00 0f 85 fa 01 00 00 45 85 f6 0f 84 f1 01 00 00 e8 ef 66 95 ff 4c 8b 74 24 18 <49> 83 c4 40 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 RSP: 0018:ffffc900033278e0 EFLAGS: 00000246 RAX: ffff88823bf96fb0 RBX: ffff888140410b48 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88823bf97000 RBP: ffffc900033279d0 R08: ffff88823bf96fff R09: 0000000000000000 R10: ffff88823bf96fb0 R11: ffffed10477f2e00 R12: ffff888140410b40 R13: dffffc0000000000 R14: ffff88823bf96fb0 R15: 0000000000000100 __kfence_alloc+0x3b0/0x3e0 mm/kfence/core.c:1210 kfence_alloc include/linux/kfence.h:129 [inline] slab_alloc_node mm/slub.c:4850 [inline] kmem_cache_alloc_noprof+0x511/0x650 mm/slub.c:4876 lsm_inode_alloc security/security.c:228 [inline] security_inode_alloc+0x39/0x310 security/security.c:1189 inode_init_always_gfp+0x9ed/0xdc0 fs/inode.c:307 inode_init_always include/linux/fs.h:2922 [inline] alloc_inode+0x82/0x1b0 fs/inode.c:354 new_inode_pseudo include/linux/fs.h:3003 [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: 0033:0x7f79b239c799 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:00007f79b3198028 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f79b2615fa0 RCX: 00007f79b239c799 RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007f79b2432c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f79b2616038 R14: 00007f79b2615fa0 R15: 00007ffc7997ba78 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 10727 Comm: kworker/u8:8 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+0xcea/0x12c0 kernel/smp.c:877 Code: 89 ee 83 e6 01 31 ff e8 24 e6 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 cf e1 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 e8 b3 e1 0b 00 eb e4 44 RSP: 0018:ffffc9001033f720 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 1ffff110170c8515 RCX: ffff88809efbbd00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9001033f860 R08: ffffffff90118cb7 R09: 1ffffffff2023196 R10: dffffc0000000000 R11: fffffbfff2023197 R12: ffff8880b86428a8 R13: dffffc0000000000 R14: ffff8880b873bf80 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125563000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000565415753a38 CR3: 000000000e54c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000000000000000 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:2761 [inline] smp_text_poke_batch_finish+0x5f5/0x1160 arch/x86/kernel/alternative.c:2971 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x240 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xab/0x290 mm/kfence/core.c:900 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245