watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.2.276:7150] Modules linked in: irq event stamp: 13906855 hardirqs last enabled at (13906854): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (13906855): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (277820): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (277820): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (277820): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (277823): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (277823): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (277823): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 7150 Comm: syz.2.276 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:debug_lockdep_rcu_enabled+0x2d/0x40 kernel/rcu/update.c:320 Code: fa 31 c0 83 3d a7 92 36 04 00 74 1e 83 3d aa c1 36 04 00 74 15 65 48 8b 0c 25 08 20 6e 92 31 c0 83 b9 2c 0b 00 00 00 0f 94 c0 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 RSP: 0018:ffffc90000006b50 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffffffff81ac2efc RCX: ffff88807c210000 RDX: 0000000000000000 RSI: ffffffff8d8f3e0a RDI: ffffffff8bbf0760 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff81738d25 R10: ffffc90000006748 R11: fffff52000000ceb R12: 1ffff92000000d85 R13: ffffc90000006c60 R14: ffffc90000006c28 R15: ffffffff81738d25 FS: 00007f7a631f66c0(0000) GS:ffff88812613e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001100 CR3: 00000000764f6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_read_lock include/linux/rcupdate.h:868 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xcb/0x2390 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:56 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:559 kvfree_call_rcu+0x130/0x4c0 mm/slab_common.c:1995 cfg80211_update_known_bss+0x830/0x1590 net/wireless/scan.c:1944 __cfg80211_bss_update+0x147/0x2120 net/wireless/scan.c:1989 cfg80211_inform_single_bss_data+0xba9/0x1ac0 net/wireless/scan.c:2381 cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3240 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3331 ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5194 [inline] ieee80211_rx_list+0x210c/0x2b90 net/mac80211/rx.c:5447 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5470 ieee80211_rx include/net/mac80211.h:5214 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453 tasklet_action_common+0x36c/0x580 kernel/softirq.c:925 handle_softirqs+0x286/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:finish_task_switch+0x26b/0x950 kernel/sched/core.c:5193 Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 5f cc b7 09 e8 ba bb 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 58 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc90003f1f338 EFLAGS: 00000282 RAX: 4123cfc05f091000 RBX: 0000000000000000 RCX: 4123cfc05f091000 RDX: 0000000000000000 RSI: ffffffff8d70d3c0 RDI: ffffffff8bbf0760 RBP: ffffc90003f1f390 R08: ffffffff8f7cda77 R09: 1ffffffff1ef9b4e R10: dffffc0000000000 R11: fffffbfff1ef9b4f R12: ffff88807c210000 R13: dffffc0000000000 R14: ffff8880319b1e40 R15: ffff8880b883abd8 context_switch kernel/sched/core.c:5328 [inline] __schedule+0x17a0/0x4cc0 kernel/sched/core.c:6929 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:7113 preempt_schedule+0xae/0xc0 kernel/sched/core.c:7137 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_unlock+0x3f/0x50 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:391 [inline] node_pool_del_va mm/vmalloc.c:1962 [inline] node_alloc mm/vmalloc.c:1986 [inline] alloc_vmap_area+0x1300/0x14c0 mm/vmalloc.c:2041 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3193 __vmalloc_node_range_noprof+0x30c/0x12d0 mm/vmalloc.c:3857 __vmalloc_node_noprof mm/vmalloc.c:3960 [inline] __vmalloc_noprof+0xb1/0xf0 mm/vmalloc.c:3974 bpf_prog_alloc_no_stats+0x4a/0x4d0 kernel/bpf/core.c:106 bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:153 bpf_prog_load+0x735/0x19e0 kernel/bpf/syscall.c:2981 __sys_bpf+0x507/0x860 kernel/bpf/syscall.c:6149 __do_sys_bpf kernel/bpf/syscall.c:6259 [inline] __se_sys_bpf kernel/bpf/syscall.c:6257 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6257 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7a64f8efc9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7a631f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f7a651e5fa0 RCX: 00007f7a64f8efc9 RDX: 0000000000000048 RSI: 000020000000e000 RDI: 0000000000000005 RBP: 00007f7a65011f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7a651e6038 R14: 00007f7a651e5fa0 R15: 00007ffe59bc1ef8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7139 Comm: syz.4.272 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:check_preemption_disabled+0x17/0x120 lib/smp_processor_id.c:14 Code: 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 48 83 ec 10 65 48 8b 05 de c4 27 07 48 89 44 24 08 <65> 8b 05 e6 c4 27 07 65 8b 0d db c4 27 07 f7 c1 ff ff ff 7f 74 23 RSP: 0018:ffffc90000a06fe0 EFLAGS: 00000082 RAX: b7089ea306b2f900 RBX: 0000000000000006 RCX: b7089ea306b2f900 RDX: ffffffff81adf885 RSI: ffffffff8d721707 RDI: ffffffff8bbf0760 RBP: ffffc90000a07138 R08: 0000000000000000 R09: ffffffff81adf885 R10: 000000000000000b R11: 0000000000010100 R12: dffffc0000000000 R13: ffffffff81adf885 R14: ffffffff997da3c8 R15: ffff888077930000 FS: 00007f00d1c866c0(0000) GS:ffff88812623e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f28d940fd27 CR3: 000000002d564000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: lockdep_recursion_inc kernel/locking/lockdep.c:465 [inline] lock_release+0xbc/0x3e0 kernel/locking/lockdep.c:5888 seqcount_lockdep_reader_access+0xde/0x1c0 include/linux/seqlock.h:73 ktime_get+0x45/0x200 kernel/time/timekeeping.c:824 hrtimer_forward_now include/linux/hrtimer.h:362 [inline] perf_swevent_hrtimer+0x3f8/0x500 kernel/events/core.c:11791 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x4e0/0xc60 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5872 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 ab cc d0 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc90000a07758 EFLAGS: 00000206 RAX: b7089ea306b2f900 RBX: 0000000000000000 RCX: b7089ea306b2f900 RDX: 0000000000000000 RSI: ffffffff8d8f3e0a RDI: ffffffff8bbf0760 RBP: ffffffff81738d25 R08: 0000000000000000 R09: ffffffff81738d25 R10: ffffc90000a07918 R11: ffffffff81ac2f50 R12: 0000000000000002 R13: ffffffff8df3d4e0 R14: 0000000000000000 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2539 [inline] slab_free mm/slub.c:6630 [inline] kmem_cache_free+0x19b/0x690 mm/slub.c:6740 skb_release_all net/core/skbuff.c:1150 [inline] __kfree_skb net/core/skbuff.c:1166 [inline] sk_skb_reason_drop+0xe9/0x170 net/core/skbuff.c:1204 kfree_skb_reason include/linux/skbuff.h:1322 [inline] kfree_skb include/linux/skbuff.h:1331 [inline] ip6_mc_input+0x8de/0xb70 net/ipv6/ip6_input.c:593 ip_sabotage_in+0x1e1/0x270 net/bridge/br_netfilter_hooks.c:990 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xc5/0x220 net/netfilter/core.c:623 nf_hook include/linux/netfilter.h:273 [inline] NF_HOOK+0x206/0x3a0 include/linux/netfilter.h:316 __netif_receive_skb_one_core net/core/dev.c:6079 [inline] __netif_receive_skb+0xd3/0x380 net/core/dev.c:6192 netif_receive_skb_internal net/core/dev.c:6278 [inline] netif_receive_skb+0x1cb/0x790 net/core/dev.c:6337 NF_HOOK+0xa0/0x390 include/linux/netfilter.h:319 br_handle_frame_finish+0x15c6/0x1c50 net/bridge/br_input.c:235 br_nf_hook_thresh+0x3c6/0x4a0 net/bridge/br_netfilter_hooks.c:-1 br_nf_pre_routing_finish_ipv6+0x999/0xd60 net/bridge/br_netfilter_ipv6.c:-1 NF_HOOK include/linux/netfilter.h:318 [inline] br_nf_pre_routing_ipv6+0x37e/0x6b0 net/bridge/br_netfilter_ipv6.c:184 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_bridge_pre net/bridge/br_input.c:291 [inline] br_handle_frame+0x982/0x14c0 net/bridge/br_input.c:442 __netif_receive_skb_core+0x10b9/0x4380 net/core/dev.c:5966 __netif_receive_skb_one_core net/core/dev.c:6077 [inline] __netif_receive_skb+0x72/0x380 net/core/dev.c:6192 process_backlog+0x60e/0x14f0 net/core/dev.c:6544 __napi_poll+0xc7/0x360 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [inline] net_rx_action+0x5f7/0xdf0 net/core/dev.c:7784 handle_softirqs+0x286/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__schedule+0x17ba/0x4cc0 kernel/sched/core.c:6940 Code: 48 89 c6 e8 98 b0 eb f5 48 89 c7 e8 b0 d8 49 f6 31 ff 49 39 de 40 0f 95 c7 e8 02 e2 49 f6 48 c7 84 24 00 01 00 00 0e 36 e0 45 <48> 8b 84 24 f8 00 00 00 4a c7 04 20 00 00 00 00 4a c7 44 20 09 00 RSP: 0018:ffffc90003fefa60 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffff88801cef3c80 RCX: b7089ea306b2f900 RDX: 0000000000000000 RSI: ffffffff8bbf0740 RDI: ffffffff8bbf0700 RBP: ffffc90003fefc70 R08: ffffffff8f7cda77 R09: 1ffffffff1ef9b4e R10: dffffc0000000000 R11: fffffbfff1ef9b4f R12: dffffc0000000000 R13: 1ffff1101712756e R14: ffff888077930000 R15: ffff88801cef5254 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:check_kcov_mode kernel/kcov.c:194 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:217 Code: 08 20 6e 92 65 8b 15 88 19 ae 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 7c 16 00 00 00 74 2c 8b 91 58 16 00 00 <83> fa 02 75 21 48 8b 91 60 16 00 00 48 8b 32 48 8d 7e 01 8b 89 5c RSP: 0018:ffffc90003fefdf8 EFLAGS: 00000246 RAX: ffffffff818c57d0 RBX: ffffc90003feff48 RCX: ffff888077930000 RDX: 0000000000000002 RSI: 0000000000000446 RDI: 0000000000000447 RBP: ffffc90003fefeb0 R08: ffffffff8f7cda77 R09: 1ffffffff1ef9b4e R10: dffffc0000000000 R11: fffffbfff1ef9b4f R12: dffffc0000000000 R13: ffff8880779315d8 R14: ffff888077930a50 R15: ffff8880779309b8 task_work_run+0xd0/0x260 kernel/task_work.c:207 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f00d0d8efc9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f00d1c86038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 0000000000000004 RBX: 00007f00d0fe5fa0 RCX: 00007f00d0d8efc9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0 RBP: 00007f00d0e11f91 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f00d0fe6038 R14: 00007f00d0fe5fa0 R15: 00007ffc36c32868