watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.3.27:6029] Modules linked in: irq event stamp: 14144261 hardirqs last enabled at (14144260): [] irqentry_exit+0x59c/0x620 kernel/entry/common.c:219 hardirqs last disabled at (14144261): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (9274494): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (9274494): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (9274494): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (9274497): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (9274497): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (9274497): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 6029 Comm: syz.3.27 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:__do_kmalloc_node mm/slub.c:5658 [inline] RIP: 0010:__kmalloc_noprof+0x40f/0x7e0 mm/slub.c:5669 Code: 09 66 90 f7 c5 00 00 40 00 0f 85 80 00 00 00 41 f6 44 24 21 80 75 78 4c 89 e7 48 89 de 4c 89 f2 89 e9 e8 84 76 0b 00 48 89 c3 <41> 8b 4c 24 30 48 8b 7c 24 10 48 89 c6 4c 89 f2 41 89 e8 41 b9 ff RSP: 0018:ffffc90000006f38 EFLAGS: 00000282 RAX: ffff88805a71f800 RBX: ffff88805a71f800 RCX: 000000000000178d RDX: 00000000bc0ebd3e RSI: 0000000000000001 RDI: 00000000031a80d3 RBP: 0000000000000920 R08: 00000000fa6c28a4 R09: 00000000d3026754 R10: 0000000000000013 R11: fffff52000000ce3 R12: ffff88813fe26dc0 R13: 0000000000000400 R14: 00000000000003b8 R15: 0000000000009600 FS: 00007fccef1b36c0(0000) GS:ffff8881256f7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c383734 CR3: 0000000079aa6000 CR4: 00000000003526f0 Call Trace: kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] ieee802_11_parse_elems_full+0x159/0x2ab0 net/mac80211/parse.c:1031 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2469 [inline] ieee80211_inform_bss+0x161/0x1160 net/mac80211/scan.c:79 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xcf9/0x1ab0 net/wireless/scan.c:2373 cfg80211_inform_bss_data+0x23f/0x3c20 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:359 __ieee80211_rx_handle_packet net/mac80211/rx.c:5287 [inline] ieee80211_rx_list+0x2508/0x3050 net/mac80211/rx.c:5544 ieee80211_rx_napi+0x1b1/0x3e0 net/mac80211/rx.c:5567 ieee80211_rx include/net/mac80211.h:5216 [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_schedule_irq+0x48/0xa0 kernel/sched/core.c:7190 Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 f3 63 fa f5 e8 3e e0 33 f6 fb bf 01 00 00 00 43 a9 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 c4 e1 33 f6 bf 01 RSP: 0018:ffffc90004a1f2e0 EFLAGS: 00000206 RAX: 00000000000009f3 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000007 RSI: ffffffff8dccc94a RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff8fef0077 R09: 1ffffffff1fde00e R10: dffffc0000000000 R11: fffffbfff1fde00f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 irqentry_exit+0x597/0x620 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:write_comp_data kernel/kcov.c:246 [inline] RIP: 0010:__sanitizer_cov_trace_cmp1+0x17/0x90 kernel/kcov.c:276 Code: 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 15 08 19 2e 11 65 8b 0d 29 19 2e 11 <81> e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 6c 16 00 00 RSP: 0018:ffffc90004a1f408 EFLAGS: 00000293 RAX: ffffffff8b9333fa RBX: 0000000000000008 RCX: 0000000080000000 RDX: ffff8880227e0000 RSI: 000000000000006f RDI: 000000000000006c RBP: ffffffff8bff6102 R08: ffff8880227e0000 R09: 0000000000000002 R10: 0000000000000025 R11: 0000000000000002 R12: 000000000000006c R13: 000000000000006f R14: 000000000000006c R15: 0000000000000008 format_decode+0x4ca/0xe10 lib/vsprintf.c:2780 vsnprintf+0x102/0xee0 lib/vsprintf.c:2889 snprintf+0xe8/0x140 lib/vsprintf.c:3041 tomoyo_audit_path_number_log security/tomoyo/file.c:233 [inline] tomoyo_path_number_perm+0x42b/0x630 security/tomoyo/file.c:734 tomoyo_path_mknod+0x14a/0x1a0 security/tomoyo/tomoyo.c:252 security_path_mknod+0x176/0x370 security/security.c:1391 may_o_create fs/namei.c:4263 [inline] lookup_open fs/namei.c:4407 [inline] open_last_lookups fs/namei.c:4549 [inline] path_openat+0x1039/0x3e20 fs/namei.c:4793 do_filp_open+0x22d/0x490 fs/namei.c:4823 do_sys_openat2+0x12f/0x220 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fccee39af79 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:00007fccef1b3028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fccee615fa0 RCX: 00007fccee39af79 RDX: 00000000000026e1 RSI: 0000200000000080 RDI: ffffffffffffff9c RBP: 00007fccee4316e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fccee616038 R14: 00007fccee615fa0 R15: 00007ffe6147bcf8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 749 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xce5/0x1270 kernel/smp.c:877 Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 c4 db 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 6f d7 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 53 d7 RSP: 0018:ffffc900036f76a0 EFLAGS: 00000293 RAX: ffffffff81b89f1d RBX: 1ffff110170c856d RCX: ffff8880250c9e80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900036f77e0 R08: ffffffff8fef0077 R09: 1ffffffff1fde00e R10: dffffc0000000000 R11: fffffbfff1fde00f R12: ffff8880b8642b68 R13: dffffc0000000000 R14: ffff8880b873bb00 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881257f7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffacaa24fca CR3: 000000000e346000 CR4: 00000000003526f0 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2711 [inline] smp_text_poke_batch_finish+0x5f5/0x1160 arch/x86/kernel/alternative.c:2921 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/0x250 mm/kfence/core.c:874 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421 kthread+0x726/0x8b0 kernel/kthread.c:463 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 sched: DL replenish lagged too much