watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.8.5756:28900] Modules linked in: irq event stamp: 11764099 hardirqs last enabled at (11764098): [] irqentry_exit+0x59c/0x620 kernel/entry/common.c:219 hardirqs last disabled at (11764099): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (73674): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (73674): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (73674): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (73677): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (73677): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (73677): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 28900 Comm: syz.8.5756 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:trace_call_bpf+0x34/0xb70 kernel/trace/bpf_trace.c:110 Code: 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec e0 00 00 00 48 89 74 24 40 49 89 ff 65 48 8b 05 e4 bc 24 11 48 89 84 24 c0 00 00 00 <49> bd 00 00 00 00 00 fc ff df 48 c7 84 24 80 00 00 00 b3 8a b5 41 RSP: 0018:ffffc90000006760 EFLAGS: 00000286 RAX: 0a9010f52f6aae00 RBX: 0000000000000001 RCX: ffff888020ea1e40 RDX: 0000000000000100 RSI: ffffe8ffffcd6000 RDI: ffffffff8e424080 RBP: ffffc90000006878 R08: 0000000000000001 R09: ffff8880b86331d8 R10: dffffc0000000000 R11: fffff91ffff9ac05 R12: ffffe8ffffcd6000 R13: ffffffff8e424080 R14: ffff8880b86331d8 R15: ffffffff8e424080 FS: 00007fae851b66c0(0000) GS:ffff8881256d3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f47ca9d4ff8 CR3: 0000000056a7e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11009 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x326/0x3f0 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+0x379/0x3a0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:312 [inline] rcu_read_unlock include/linux/rcupdate.h:868 [inline] class_rcu_destructor include/linux/rcupdate.h:1166 [inline] unwind_next_frame+0x1aaa/0x23c0 arch/x86/kernel/unwind_orc.c:695 __unwind_start+0x5b8/0x760 arch/x86/kernel/unwind_orc.c:773 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 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:5657 [inline] __kmalloc_noprof+0x40c/0x7e0 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:962 [inline] kzalloc_noprof include/linux/slab.h:1200 [inline] ieee802_11_parse_elems_full+0x159/0x2ab0 net/mac80211/parse.c:1031 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2467 [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+0x552/0xa40 net/mac80211/scan.c:364 __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:7194 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 b3 40 f6 f5 e8 fe a8 2f f6 fb bf 01 00 00 00 c3 a7 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 84 aa 2f f6 bf 01 RSP: 0018:ffffc90004a97550 EFLAGS: 00000202 RAX: 0000000000011fcb RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000007 RSI: ffffffff8dccf6c8 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff8fefab77 R09: 1ffffffff1fdf56e R10: dffffc0000000000 R11: fffffbfff1fdf56f 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:orc_ip arch/x86/kernel/unwind_orc.c:81 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:103 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:238 [inline] RIP: 0010:unwind_next_frame+0x51a/0x23c0 arch/x86/kernel/unwind_orc.c:510 Code: 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 49 63 07 <4c> 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 8d 47 fc 48 0f 47 d8 RSP: 0018:ffffc90004a97678 EFLAGS: 00000246 RAX: fffffffff2124e93 RBX: ffffffff90108564 RCX: dffffc0000000000 RDX: ffffffff90108540 RSI: ffffffff909057d2 RDI: ffffffff8c075220 RBP: ffffffff90108540 R08: 000000000000000a R09: ffffffff8e557fe0 R10: ffffc90004a97420 R11: ffffffff81af8c70 R12: ffffffff8222d343 R13: ffffffff90108540 R14: ffffc90004a97748 R15: ffffffff90108550 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:1433 [inline] __free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973 discard_slab mm/slub.c:3346 [inline] __put_partials+0x146/0x170 mm/slub.c:3886 __slab_free+0x294/0x320 mm/slub.c:5956 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:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] __kmalloc_cache_noprof+0x36f/0x6e0 mm/slub.c:5775 kmalloc_noprof include/linux/slab.h:958 [inline] kzalloc_noprof include/linux/slab.h:1200 [inline] find_get_pmu_context+0x8b/0x890 kernel/events/core.c:5060 __do_sys_perf_event_open kernel/events/core.c:13735 [inline] __se_sys_perf_event_open+0xbe9/0x1d60 kernel/events/core.c:13471 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: 0033:0x7fae8439bf79 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:00007fae851b6028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fae84616450 RCX: 00007fae8439bf79 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007fae844327e0 R08: 0000000000000002 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007fae846164e8 R14: 00007fae84616450 R15: 00007ffcc5a18438 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 28638 Comm: kworker/u8:0 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:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x10/0x70 kernel/kcov.c:217 Code: de 5b e9 73 b3 5d 00 cc cc cc 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 0d e8 5f 30 11 <65> 8b 15 09 60 30 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 RSP: 0018:ffffc9000b787718 EFLAGS: 00000202 RAX: ffffffff81b87a6d RBX: 1ffff110170c8579 RCX: ffff8880435d0000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000b787860 R08: ffffffff8fefab77 R09: 1ffffffff1fdf56e R10: dffffc0000000000 R11: fffffbfff1fdf56f R12: ffff8880b8642bc8 R13: dffffc0000000000 R14: ffff8880b873bb40 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881257d3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b4219e8a38 CR3: 000000000e344000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: csd_lock_wait kernel/smp.c:342 [inline] smp_call_function_many_cond+0xcfd/0x1270 kernel/smp.c:877 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/0x290 mm/kfence/core.c:894 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+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246