watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.7.242:7208] Modules linked in: irq event stamp: 14164471 hardirqs last enabled at (14164470): [] irqentry_exit+0x5dd/0x660 kernel/entry/common.c:219 hardirqs last disabled at (14164471): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (13486324): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (13486324): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (13486324): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (13486327): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (13486327): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (13486327): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 7208 Comm: syz.7.242 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:perf_trace_lock_acquire+0x33e/0x410 include/trace/events/lock.h:24 Code: 00 00 00 4c 8b 4c 24 60 41 b8 01 00 00 00 44 89 f6 48 8b 4c 24 38 6a 00 ff 74 24 10 e8 cb 68 55 00 48 83 c4 10 4c 8b 64 24 20 <48> c7 44 24 40 0e 36 e0 45 4b c7 04 3c 00 00 00 00 43 c7 44 3c 08 RSP: 0018:ffffc900000063e0 EFLAGS: 00000246 RAX: 1ffffd1ffff855f7 RBX: ffffe8ffffc2afb8 RCX: ffffe8ffffc2afb8 RDX: 0000000000000000 RSI: ffffffff8bc086c0 RDI: ffffffff8bc08680 RBP: ffffc900000064d8 R08: 0000000000000002 R09: 0000000000000000 R10: ffffc900000061c8 R11: ffffffff81ada100 R12: 1ffff92000000c84 R13: 000000000000000d R14: ffffffff8de0fc28 R15: dffffc0000000000 FS: 00007ff256ba16c0(0000) GS:ffff888125e34000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555e7dc5c8 CR3: 0000000028458000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2fb/0x340 kernel/locking/lockdep.c:5831 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+0xc2/0x23d0 arch/x86/kernel/unwind_orc.c:495 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:584 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:2540 [inline] slab_free mm/slub.c:6668 [inline] kmem_cache_free+0x197/0x620 mm/slub.c:6779 skb_release_data+0x62d/0x7c0 net/core/skbuff.c:1107 skb_release_all net/core/skbuff.c:1182 [inline] __kfree_skb+0x55/0x70 net/core/skbuff.c:1196 tcp_data_queue+0x14c/0x5e30 net/ipv4/tcp_input.c:5390 tcp_rcv_established+0xf57/0x2580 net/ipv4/tcp_input.c:6474 tcp_v4_do_rcv+0xa90/0x1430 net/ipv4/tcp_ipv4.c:1881 tcp_v4_rcv+0x2675/0x2f20 net/ipv4/tcp_ipv4.c:2324 ip_protocol_deliver_rcu+0x221/0x440 net/ipv4/ip_input.c:207 ip_local_deliver_finish+0x3bb/0x6f0 net/ipv4/ip_input.c:241 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318 dst_input include/net/dst.h:474 [inline] ip_sublist_rcv_finish+0x221/0x2a0 net/ipv4/ip_input.c:584 ip_list_rcv_finish net/ipv4/ip_input.c:636 [inline] ip_sublist_rcv+0x74c/0xa10 net/ipv4/ip_input.c:644 ip_list_rcv+0x3e2/0x430 net/ipv4/ip_input.c:678 __netif_receive_skb_list_ptype net/core/dev.c:6180 [inline] __netif_receive_skb_list_core+0x7d2/0x800 net/core/dev.c:6227 __netif_receive_skb_list net/core/dev.c:6279 [inline] netif_receive_skb_list_internal+0x96f/0xcb0 net/core/dev.c:6370 gro_normal_list include/net/gro.h:524 [inline] gro_normal_one include/net/gro.h:544 [inline] gro_skb_finish net/core/gro.c:603 [inline] gro_receive_skb+0x632/0xca0 net/core/gro.c:633 receive_buf+0xaf2/0x1900 drivers/net/virtio_net.c:2675 virtnet_receive_packets drivers/net/virtio_net.c:3023 [inline] virtnet_receive drivers/net/virtio_net.c:3047 [inline] virtnet_poll+0x20f6/0x2ee0 drivers/net/virtio_net.c:3136 __napi_poll+0xae/0x320 net/core/dev.c:7666 napi_poll net/core/dev.c:7729 [inline] net_rx_action+0x672/0xe50 net/core/dev.c:7881 handle_softirqs+0x27d/0x850 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: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:__sanitizer_cov_trace_pc+0x46/0x70 kernel/kcov.c:222 Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 6c 16 00 00 00 74 2c 8b 91 48 16 00 00 83 fa 02 75 21 48 8b 91 50 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 4c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 RSP: 0018:ffffc9000bbb6e80 EFLAGS: 00000246 RAX: ffffffff81f32a95 RBX: 0000000000000000 RCX: ffff888029749e80 RDX: ffffc9001c30f000 RSI: 00000000000030c2 RDI: ffffe8ffffcdc000 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff8880b86330f0 R10: 6f6c5f646165725f R11: 64656863735f6b63 R12: ffffe8ffffcdc000 R13: ffffffff8de0fd00 R14: ffff8880b86330f0 R15: dffffc0000000000 perf_trace_run_bpf_submit+0x35/0x170 kernel/events/core.c:10997 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 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+0x389/0x3b0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock_sched include/linux/rcupdate.h:979 [inline] pfn_valid include/linux/mmzone.h:2193 [inline] __virt_addr_valid+0x475/0x5c0 arch/x86/mm/physaddr.c:54 kasan_addr_to_slab+0xf/0x60 mm/kasan/common.c:46 kasan_record_aux_stack+0xf/0xd0 mm/kasan/generic.c:541 __call_rcu_common kernel/rcu/tree.c:3119 [inline] call_rcu+0x157/0x9c0 kernel/rcu/tree.c:3239 context_switch kernel/sched/core.c:5259 [inline] __schedule+0x14c4/0x5000 kernel/sched/core.c:6863 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7190 irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:should_failslab+0x93/0x100 mm/failslab.c:46 Code: 48 c1 e9 03 42 0f b6 0c 21 84 c9 75 62 41 f6 47 01 40 74 37 c1 eb 0d 83 e3 01 49 83 c6 34 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 <84> c0 75 2a 41 8b 36 48 c7 c7 00 a5 06 8e 89 da e8 08 75 9d 02 31 RSP: 0018:ffffc9000bbb75e8 EFLAGS: 00000a03 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 87bda01160540a00 RDX: ffff888029749e80 RSI: 0000000000000cc0 RDI: ffff88813ffb0a00 RBP: 00000000ffffffff R08: ffffc9000bbb7257 R09: 0000000000000000 R10: ffffc9000bbb7248 R11: fffff52001776e4b R12: dffffc0000000000 R13: 0000000000000cc0 R14: ffff88813ffb0a34 R15: ffff88813ffb0a00 slab_pre_alloc_hook mm/slub.c:4906 [inline] slab_alloc_node mm/slub.c:5239 [inline] kmem_cache_alloc_node_noprof+0x8c/0x720 mm/slub.c:5315 alloc_vmap_area+0x2a0/0x14e0 mm/vmalloc.c:2060 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3219 __vmalloc_node_range_noprof+0x371/0x16a0 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/0x500 kernel/bpf/core.c:106 bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:155 bpf_prog_load+0x735/0x1a10 kernel/bpf/syscall.c:2992 __sys_bpf+0x5c3/0x8a0 kernel/bpf/syscall.c:6207 __do_sys_bpf kernel/bpf/syscall.c:6320 [inline] __se_sys_bpf kernel/bpf/syscall.c:6318 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6318 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff255d8f749 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:00007ff256ba1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007ff255fe5fa0 RCX: 00007ff255d8f749 RDX: 0000000000000094 RSI: 0000200000000200 RDI: 0000000000000005 RBP: 00007ff255e13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff255fe6038 R14: 00007ff255fe5fa0 R15: 00007fffb41d0f48 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7213 Comm: syz.9.243 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: 89 fb e8 23 00 00 00 48 8b 3d e4 83 d9 0b 48 89 de 5b e9 d3 77 5b 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 c0 7e 92 65 8b 15 e8 0d RSP: 0000:ffffc90000a07238 EFLAGS: 00000046 RAX: ffffffff81af671d RBX: ffffffff998e4500 RCX: ffff888029dd0000 RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a072f8 R08: ffff888029dd0000 R09: 0000000000000004 R10: 000000000000000b R11: 0000000000010100 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 1ffff92000140e48 FS: 00007f0229ac06c0(0000) GS:ffff888125f34000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4895b9a040 CR3: 0000000031b84000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: seqcount_lockdep_reader_access+0xab/0x1c0 include/linux/seqlock.h:72 ktime_get+0x45/0x200 kernel/time/timekeeping.c:824 hrtimer_forward_now include/linux/hrtimer.h:362 [inline] perf_swevent_hrtimer+0x45f/0x570 kernel/events/core.c:11861 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x4d0/0xc30 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x102/0x3e0 arch/x86/kernel/apic/apic.c:1062 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:perf_trace_buf_alloc+0x1c6/0x280 kernel/trace/trace_event_perf.c:421 Code: 08 4c 89 ff e8 8b cf 5c 00 4d 03 37 48 63 c3 4a 8d 3c 30 48 83 c7 f8 ba 08 00 00 00 31 f6 e8 41 d2 5c 00 4c 89 f0 48 83 c4 08 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 45 30 f6 ff 48 RSP: 0000:ffffc90000a07928 EFLAGS: 00000286 RAX: ffffe8ffffde2000 RBX: 000000000000002c RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffe8ffffde202c RBP: 0000000000000001 R08: 0000000000000004 R09: 0000000000000004 R10: ffffe8ffffde2024 R11: fffff91ffffbc406 R12: ffffffff8d9b2dd8 R13: dffffc0000000000 R14: ffffe8ffffde2000 R15: ffffffff8d9b2dd8 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x196/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2fb/0x340 kernel/locking/lockdep.c:5831 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+0xc2/0x23d0 arch/x86/kernel/unwind_orc.c:495 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:556 kvfree_call_rcu+0x11b/0x480 mm/slab_common.c:1994 cfg80211_update_known_bss+0x830/0x1590 net/wireless/scan.c:1944 __cfg80211_bss_update+0x147/0x2110 net/wireless/scan.c:1989 cfg80211_inform_single_bss_data+0xbc8/0x1ad0 net/wireless/scan.c:2369 cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:230 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:359 __ieee80211_rx_handle_packet net/mac80211/rx.c:5282 [inline] ieee80211_rx_list+0x2485/0x2f90 net/mac80211/rx.c:5539 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5562 ieee80211_rx include/net/mac80211.h:5216 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x358/0x550 kernel/softirq.c:925 handle_softirqs+0x27d/0x850 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: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:__schedule+0x5/0x5000 kernel/sched/core.c:6719 Code: 89 d9 48 8b 5c 24 08 e9 ee fe ff ff cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec e0 01 00 RSP: 0000:ffffc9000ce2f830 EFLAGS: 00000246 RAX: 1ffff110053ba2a4 RBX: ffffffff8b5d327e RCX: 0000000000000000 RDX: 0000000000000007 RSI: ffffffff8d792d97 RDI: 0000000000000001 RBP: ffffc9000ce2f8d8 R08: ffffffff8f822377 R09: 1ffffffff1f0446e R10: dffffc0000000000 R11: fffffbfff1f0446f R12: dffffc0000000000 R13: ffff88807bd48000 R14: ffff888029dd1520 R15: dffffc0000000000 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:7047 preempt_schedule+0xae/0xc0 kernel/sched/core.c:7071 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xfd/0x110 kernel/locking/spinlock.c:194 __debug_check_no_obj_freed lib/debugobjects.c:1108 [inline] debug_check_no_obj_freed+0x52e/0x550 lib/debugobjects.c:1129 free_pages_prepare mm/page_alloc.c:1402 [inline] __free_frozen_pages+0x4dd/0xd30 mm/page_alloc.c:2943 discard_slab mm/slub.c:3346 [inline] __put_partials+0x146/0x170 mm/slub.c:3886 put_cpu_partial+0x1f2/0x2d0 mm/slub.c:3961 __slab_free+0x288/0x2a0 mm/slub.c:5952 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:349 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x37d/0x710 mm/slub.c:5270 alloc_empty_file+0x55/0x1d0 fs/file_table.c:237 alloc_file fs/file_table.c:354 [inline] alloc_file_pseudo+0x13d/0x210 fs/file_table.c:383 sock_alloc_file+0xb8/0x2e0 net/socket.c:483 __sys_socketpair+0x387/0x560 net/socket.c:1841 __do_sys_socketpair net/socket.c:1863 [inline] __se_sys_socketpair net/socket.c:1860 [inline] __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1860 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0228b8f749 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:00007f0229ac0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007f0228de5fa0 RCX: 00007f0228b8f749 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 00007f0228c13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000380 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0228de6038 R14: 00007f0228de5fa0 R15: 00007fff4f3478a8