watchdog: BUG: soft lockup - CPU#1 stuck for 113s! [syz.5.385:7725] Modules linked in: irq event stamp: 15778807 hardirqs last enabled at (15778806): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (15778807): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (4866974): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (4866974): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (4866974): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (4866977): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (4866977): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (4866977): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 7725 Comm: syz.5.385 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 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 fb ac f3 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:ffffc90000a08898 EFLAGS: 00000206 RAX: 5237c78d6605d700 RBX: 0000000000000000 RCX: 5237c78d6605d700 RDX: 0000000000000000 RSI: ffffffff8d9d15ee RDI: ffffffff8bc07760 RBP: ffffffff8abaf508 R08: 0000000000000000 R09: ffffffff8abaf508 R10: ffffc90000a08508 R11: fffff520001410a3 R12: 0000000000000002 R13: ffffffff8e13d2e0 R14: 0000000000000000 R15: 0000000000000246 FS: 00007f88214eb6c0(0000) GS:ffff888125e0c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9a16051bf8 CR3: 0000000033288000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] link_sta_info_get_bss+0x74/0x3b0 net/mac80211/sta_info.c:264 ieee80211_rx_for_interface+0x76/0x630 net/mac80211/rx.c:5109 __ieee80211_rx_handle_packet net/mac80211/rx.c:5312 [inline] ieee80211_rx_list+0x2285/0x2b90 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:perf_trace_init+0x96/0x2d0 kernel/trace/trace_event_perf.c:223 Code: 5c 00 48 8b 1d 6b 4d 50 0c 48 81 fb e0 1c 1a 8e 0f 84 75 01 00 00 4c 89 24 24 4c 8d 63 30 4c 89 e0 48 c1 e8 03 42 0f b6 04 30 <84> c0 0f 85 17 01 00 00 4d 63 24 24 4c 89 ff 4c 89 e6 e8 a3 76 f6 RSP: 0018:ffffc9000ecf7a78 EFLAGS: 00000a06 RAX: 0000000000000000 RBX: ffffffff8e5a75c0 RCX: 0000000000080000 RDX: ffffc90004e82000 RSI: 0000000000001b0f RDI: 0000000000001b10 RBP: 0000000000000002 R08: ffffffff8f9e1077 R09: 1ffffffff1f3c20e R10: dffffc0000000000 R11: fffffbfff1f3c20f R12: ffffffff8e5a75f0 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000148 perf_tp_event_init+0x8d/0x120 kernel/events/core.c:10872 perf_try_init_event+0x17f/0x870 kernel/events/core.c:12605 perf_init_event kernel/events/core.c:12703 [inline] perf_event_alloc+0x133e/0x2be0 kernel/events/core.c:12978 __do_sys_perf_event_open kernel/events/core.c:13496 [inline] __se_sys_perf_event_open+0x772/0x1d70 kernel/events/core.c:13377 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: 0033:0x7f882058eec9 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:00007f88214eb038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f88207e5fa0 RCX: 00007f882058eec9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007f8820611f91 R08: 000000000000000a R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f88207e6038 R14: 00007f88207e5fa0 R15: 00007fffe54c1838 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 7731 Comm: syz.0.388 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:kvm_guest_state+0x0/0x150 virt/kvm/kvm_main.c:6430 Code: aa 4c 89 f7 e8 21 59 e7 00 eb a0 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 41 57 41 56 53 e8 21 b2 81 00 bf 01 00 00 00 e8 97 RSP: 0018:ffffc90000006af8 EFLAGS: 00000046 RAX: ffffffff81f05fcf RBX: 1ffff92000000d64 RCX: ffff8880250abc80 RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000006c10 R08: 0000000000000000 R09: ffffffff81f05e4f R10: dffffc0000000000 R11: ffffffff81f05dc0 R12: 0000000000000000 R13: ffff88803076a680 R14: ffff88803076a580 R15: ffffc90000007248 FS: 00007fb31d4266c0(0000) GS:ffff888125d0c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ecfa61b028 CR3: 0000000027a00000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_guest_state include/linux/perf_event.h:1684 [inline] should_sample_guest kernel/events/core.c:7412 [inline] perf_misc_flags kernel/events/core.c:7418 [inline] perf_prepare_header kernel/events/core.c:8423 [inline] __perf_event_output kernel/events/core.c:8496 [inline] perf_event_output_forward+0x222/0x430 kernel/events/core.c:8516 __perf_event_overflow+0x830/0xe40 kernel/events/core.c:10392 perf_swevent_hrtimer+0x3b8/0x500 kernel/events/core.c:11786 __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:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline] RIP: 0010:unwind_next_frame+0x1315/0x2390 arch/x86/kernel/unwind_orc.c:494 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:ffffc900000072f8 EFLAGS: 00000246 RAX: fffffffffb2b24f4 RBX: ffffffff90206b74 RCX: dffffc0000000000 RDX: ffffffff90206b74 RSI: ffffffff90d2c546 RDI: ffffffff8bc07700 RBP: ffffffff90206b74 R08: 0000000000000001 R09: ffffffff8173cd25 R10: ffffc90000006f08 R11: ffffffff81ac6cd0 R12: ffffffff8b4b9159 R13: ffffffff90206b74 R14: ffffc900000073c8 R15: ffffffff90206b74 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_mempool_poison_object+0xad/0x130 mm/kasan/common.c:545 kasan_mempool_poison_object include/linux/kasan.h:362 [inline] napi_skb_cache_put+0x7b/0x730 net/core/skbuff.c:1422 __free_old_xmit+0x2c7/0x650 drivers/net/virtio_net.c:-1 virtnet_free_old_xmit drivers/net/virtio_net.c:639 [inline] free_old_xmit drivers/net/virtio_net.c:1094 [inline] virtnet_poll_cleantx drivers/net/virtio_net.c:3063 [inline] virtnet_poll+0x3ed/0x2d80 drivers/net/virtio_net.c:3107 __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:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7256 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 10 00 00 00 74 64 bf 01 00 00 00 e8 ab 04 43 f6 e8 36 d7 7a f6 fb bf 01 00 00 00 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc90002f177c0 EFLAGS: 00000282 RAX: 3877a225680e1d00 RBX: 0000000000000000 RCX: 3877a225680e1d00 RDX: 0000000000000007 RSI: ffffffff8d7e8438 RDI: 0000000000000001 RBP: ffffc90002f17860 R08: ffffffff8f9e1077 R09: 1ffffffff1f3c20e R10: dffffc0000000000 R11: fffffbfff1f3c20f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920005e2ef8 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:slab_update_freelist mm/slub.c:846 [inline] RIP: 0010:__slab_free+0x235/0x390 mm/slub.c:5888 Code: ea 48 8b 4c 24 08 4d 89 f8 e8 57 df ff ff 41 89 c7 e9 5f fe ff ff 48 8b 5c 24 08 4c 89 f9 4c 89 e0 4c 89 ea f0 48 0f c7 4e 20 <0f> 85 b0 fe ff ff 48 85 ed 75 2c 45 85 ed 79 57 65 48 8b 05 43 cf RSP: 0018:ffffc90002f17928 EFLAGS: 00000242 RAX: 0000000000000000 RBX: ffff888029464000 RCX: 0000000000040003 RDX: 0000000000040004 RSI: ffffea0000a51800 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1f3c20f R12: 0000000000000000 R13: 0000000000040004 R14: ffff88813ffa7140 R15: 0000000000040003 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4955 [inline] slab_alloc_node mm/slub.c:5265 [inline] __do_kmalloc_node mm/slub.c:5626 [inline] __kmalloc_noprof+0x3c3/0x7f0 mm/slub.c:5639 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] bpf_prog_array_alloc kernel/bpf/core.c:2557 [inline] bpf_prog_array_copy+0x198/0x370 kernel/bpf/core.c:2769 perf_event_attach_bpf_prog+0x25a/0x3a0 kernel/trace/bpf_trace.c:1935 _perf_ioctl kernel/events/core.c:6377 [inline] perf_ioctl+0x7d4/0x1ec0 kernel/events/core.c:6437 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 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: 0033:0x7fb31c58eec9 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:00007fb31d426038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb31c7e5fa0 RCX: 00007fb31c58eec9 RDX: 000000000000000a RSI: 0000000040042408 RDI: 0000000000000003 RBP: 00007fb31c611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb31c7e6038 R14: 00007fb31c7e5fa0 R15: 00007ffcb26d0288