watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.9.1144:14918] Modules linked in: irq event stamp: 3701597 hardirqs last enabled at (3701596): [] irqentry_exit+0x59c/0x620 kernel/entry/common.c:219 hardirqs last disabled at (3701597): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (19068): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (19068): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (19068): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (19071): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (19071): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (19071): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 14918 Comm: syz.9.1144 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216 Code: 8b 3d 04 d6 33 0c 48 89 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 RSP: 0018:ffffc90000a07910 EFLAGS: 00000246 RAX: ffffffff81c8bb25 RBX: 0000000000000000 RCX: ffff88802b165ac0 RDX: 0000000000000100 RSI: 0000000000000200 RDI: 0000000000000000 RBP: 00000000000000ec R08: ffffc90000a07b8f R09: 0000000000000000 R10: ffffc90000a07b80 R11: fffff52000140f72 R12: ffffe8ffffdf5000 R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007fc8ae2a56c0(0000) GS:ffff8881257d3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa6c985b368 CR3: 0000000039bca000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: tracing_gen_ctx_irq_test+0x15/0x160 kernel/trace/trace.c:2598 tracing_gen_ctx_flags include/linux/trace_events.h:201 [inline] tracing_gen_ctx include/linux/trace_events.h:208 [inline] perf_trace_buf_update+0x3f/0x190 kernel/trace/trace_event_perf.c:429 perf_tp_event+0x157/0x29b0 kernel/events/core.c:11076 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:11014 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 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 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] cfg80211_inform_single_bss_data+0x934/0x1ab0 net/wireless/scan.c:2345 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:finish_task_switch+0x241/0x920 kernel/sched/core.c:5118 Code: 0f 84 bd 01 00 00 48 85 db 0f 85 e4 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 f9 21 0a 0a e8 b4 60 38 00 fb 4c 8b 65 c0 <49> 8d bc 24 28 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc900044eeaf8 EFLAGS: 00000202 RAX: 0000000000000bf1 RBX: 0000000000000000 RCX: 0000000080000001 RDX: 0000000000000000 RSI: ffffffff8dccf6c8 RDI: ffffffff8c075280 RBP: ffffc900044eeb50 R08: ffffffff8fefab77 R09: 1ffffffff1fdf56e R10: dffffc0000000000 R11: fffffbfff1fdf56f R12: ffff88802b165ac0 R13: dffffc0000000000 R14: ffff88802e038000 R15: ffff8880b873b4d8 context_switch kernel/sched/core.c:5263 [inline] __schedule+0x152a/0x51d0 kernel/sched/core.c:6867 preempt_schedule_notrace+0x57/0x90 kernel/sched/core.c:7144 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:469 [inline] __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x391/0x3a0 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 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+0x228/0x280 mm/page_alloc.c:1884 prep_new_page mm/page_alloc.c:1892 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240 __alloc_pages_noprof mm/page_alloc.c:5274 [inline] alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194 ___alloc_pages_bulk mm/kasan/shadow.c:345 [inline] __kasan_populate_vmalloc_do mm/kasan/shadow.c:370 [inline] __kasan_populate_vmalloc+0xc1/0x1d0 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0xdbc/0x14a0 mm/vmalloc.c:2124 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3219 __vmalloc_node_range_noprof+0x372/0x1730 mm/vmalloc.c:4011 __vmalloc_node_noprof mm/vmalloc.c:4111 [inline] __vmalloc_noprof+0xd2/0x120 mm/vmalloc.c:4127 bpf_prog_alloc_no_stats+0x4a/0x4f0 kernel/bpf/core.c:106 bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:155 bpf_prog_load+0x7ba/0x1ae0 kernel/bpf/syscall.c:2992 __sys_bpf+0x618/0x950 kernel/bpf/syscall.c:6228 __do_sys_bpf kernel/bpf/syscall.c:6341 [inline] __se_sys_bpf kernel/bpf/syscall.c:6339 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6339 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: 0033:0x7fc8ad39bf79 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:00007fc8ae2a5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fc8ad615fa0 RCX: 00007fc8ad39bf79 RDX: 0000000000000094 RSI: 0000200000000880 RDI: 0000000000000005 RBP: 00007fc8ad4327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc8ad616038 R14: 00007fc8ad615fa0 R15: 00007ffc5c221608 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 14590 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 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 14 fa 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 bf f5 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 a3 f5 RSP: 0000:ffffc90004e9f820 EFLAGS: 00000293 RAX: ffffffff81b87a6d RBX: 1ffff110170e8131 RCX: ffff88802e038000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90004e9f950 R08: ffffffff8fefab77 R09: 1ffffffff1fdf56e R10: dffffc0000000000 R11: fffffbfff1fdf56f R12: ffff8880b8740988 R13: dffffc0000000000 R14: ffff8880b863bb40 R15: 0000000000000001 FS: 000055556c943500(0000) GS:ffff8881256d3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556c95ea28 CR3: 0000000078422000 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 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1382 [inline] flush_tlb_mm_range+0x5c3/0x10c0 arch/x86/mm/tlb.c:1472 flush_tlb_page arch/x86/include/asm/tlbflush.h:324 [inline] ptep_clear_flush+0x120/0x170 mm/pgtable-generic.c:103 wp_page_copy mm/memory.c:3788 [inline] do_wp_page+0x40b4/0x5990 mm/memory.c:4183 handle_pte_fault mm/memory.c:6292 [inline] __handle_mm_fault mm/memory.c:6414 [inline] handle_mm_fault+0x1520/0x32a0 mm/memory.c:6583 do_user_addr_fault+0xa73/0x1360 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7fc8ad360ba0 Code: a1 28 00 48 8d 0c 1e 49 39 d0 49 89 48 60 0f 95 c2 48 29 d8 0f b6 d2 48 83 c8 01 48 c1 e2 02 48 09 da 48 83 ca 01 48 89 56 08 <48> 89 41 08 48 8d 4e 10 eb b0 48 8d 0d c7 e3 0c 00 ba 9e 10 00 00 RSP: 002b:00007ffc5c221810 EFLAGS: 00010206 RAX: 00000000000065e1 RBX: 0000000000008040 RCX: 000055556c95ea20 RDX: 0000000000008041 RSI: 000055556c9569e0 RDI: 0000000000000004 RBP: 0000000000000802 R08: 00007fc8ad5eacc0 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000008030 R13: 0000000000000000 R14: 00007fc8ad5ead20 R15: 0000000000000000