watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.8.5094:25867] Modules linked in: irq event stamp: 13475335 hardirqs last enabled at (13475334): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (13475335): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (54920): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (54920): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (54920): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (54923): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (54923): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (54923): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 25867 Comm: syz.8.5094 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:unwind_get_return_address+0x6a/0x90 arch/x86/kernel/unwind_orc.c:386 Code: e8 0b 81 b9 00 48 8b 3b e8 c3 6e 19 00 85 c0 74 14 43 80 3c 37 00 74 08 48 89 df e8 f0 80 b9 00 48 8b 03 eb 02 31 c0 5b 41 5e <41> 5f e9 8f 9b 3b 0a cc 89 d9 80 e1 07 80 c1 03 38 c1 7c a8 48 89 RSP: 0018:ffffc90000a07d78 EFLAGS: 00000246 RAX: ffffffff8b16e598 RBX: ffffc90000a07e40 RCX: 0000000000000300 RDX: 0000000000000001 RSI: ffffffff8e16b21c RDI: ffffffff8b16e598 RBP: ffffc90000a07e10 R08: ffffc90000a078d7 R09: 0000000000000000 R10: ffffc90000a078c8 R11: fffff52000140f1b R12: ffff888031538000 R13: 0000000000000000 R14: ffffffff81b0d030 R15: 1ffff92000140fba FS: 00007f25c99426c0(0000) GS:ffff888125557000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000003f80 CR3: 00000000789b6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0xfb/0x150 arch/x86/kernel/stacktrace.c:26 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 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2685 [inline] slab_free mm/slub.c:6165 [inline] kfree+0x1c1/0x630 mm/slub.c:6483 ieee80211_inform_bss+0xc75/0x1160 net/mac80211/scan.c:164 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd08/0x1b70 net/wireless/scan.c:2372 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:__unwind_start+0xd/0x760 arch/x86/kernel/unwind_orc.c:700 Code: 00 00 00 fc ff df e9 30 ff ff ff 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 <53> 48 83 ec 28 48 89 4c 24 10 49 89 d4 49 89 f5 48 89 fb 49 be 00 RSP: 0018:ffffc90004a46618 EFLAGS: 00000246 RAX: ffff888031538000 RBX: ffffc90004a46700 RCX: ffffc90004a466d0 RDX: 0000000000000000 RSI: ffff888031538000 RDI: ffffc90004a46648 RBP: ffffc90004a466d0 R08: ffffc90004a46597 R09: 0000000000000000 R10: ffffc90004a46780 R11: fffff52000948cb3 R12: ffff888031538000 R13: ffff888031d61e80 R14: ffffffff81b0d030 R15: 0000000000000000 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 __call_rcu_common kernel/rcu/tree.c:3131 [inline] call_rcu+0xee/0x890 kernel/rcu/tree.c:3251 context_switch kernel/sched/core.c:5301 [inline] __schedule+0x15e5/0x52d0 kernel/sched/core.c:6911 preempt_schedule_notrace+0x57/0x90 kernel/sched/core.c:7188 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:469 [inline] perf_trace_lock+0x38b/0x410 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x392/0x3d0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:322 [inline] rcu_read_unlock include/linux/rcupdate.h:881 [inline] class_rcu_destructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0x1aaa/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 __set_page_owner+0x8d/0x4c0 mm/page_owner.c:341 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889 prep_new_page mm/page_alloc.c:1897 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2490 alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline] alloc_pages_noprof+0xa8/0x1a0 mm/mempolicy.c:2581 get_free_pages_noprof+0xf/0x80 mm/page_alloc.c:5309 __kasan_populate_vmalloc_do mm/kasan/shadow.c:364 [inline] __kasan_populate_vmalloc+0x38/0x1d0 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0xd73/0x14b0 mm/vmalloc.c:2129 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3232 __vmalloc_node_range_noprof+0x372/0x1730 mm/vmalloc.c:4024 __vmalloc_node_noprof mm/vmalloc.c:4124 [inline] __vmalloc_noprof+0xd2/0x120 mm/vmalloc.c:4140 bpf_prog_alloc_no_stats+0x4a/0x4f0 kernel/bpf/core.c:107 bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:156 bpf_prog_load+0x7ba/0x1ae0 kernel/bpf/syscall.c:2993 __sys_bpf+0x618/0x950 kernel/bpf/syscall.c:6249 __do_sys_bpf kernel/bpf/syscall.c:6362 [inline] __se_sys_bpf kernel/bpf/syscall.c:6360 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6360 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: 0033:0x7f25c899c819 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:00007f25c9942028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f25c8c15fa0 RCX: 00007f25c899c819 RDX: 0000000000000094 RSI: 0000200000000040 RDI: 0000000000000005 RBP: 00007f25c8a32c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f25c8c16038 R14: 00007f25c8c15fa0 R15: 00007ffef3cc43f8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 24882 Comm: kworker/u8:54 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xce5/0x12c0 kernel/smp.c:877 Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 b4 e6 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 5f e2 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 43 e2 RSP: 0018:ffffc90005977700 EFLAGS: 00000293 RAX: ffffffff81b9ccad RBX: 1ffff110170e813d RCX: ffff88802e5bbd00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90005977840 R08: ffffffff9011ccb7 R09: 1ffffffff2023996 R10: dffffc0000000000 R11: fffffbfff2023997 R12: ffff8880b87409e8 R13: dffffc0000000000 R14: ffff8880b863c000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888125457000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe1bdacf8c CR3: 000000000e54c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 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:3276 [inline] process_scheduled_works+0xb6e/0x18c0 kernel/workqueue.c:3359 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3440 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