watchdog: BUG: soft lockup - CPU#0 stuck for 142s! [syz.0.7994:8183] Modules linked in: irq event stamp: 12827805 hardirqs last enabled at (12827804): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (12827805): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (12366186): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (12366186): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (12366186): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (12366189): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (12366189): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (12366189): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 8183 Comm: syz.0.7994 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:metadata_dst_alloc+0x2f/0x3f0 net/core/dst.c:298 Code: 41 57 41 56 41 55 41 54 53 89 d5 89 f3 41 89 fe e8 c6 b7 44 f8 45 89 f4 49 8d bc 24 00 01 00 00 89 ee e8 74 26 a3 f8 49 89 c6 <48> 85 c0 0f 84 a9 02 00 00 49 89 c7 48 bd 00 00 00 00 00 fc ff df RSP: 0018:ffffc90000007458 EFLAGS: 00000292 RAX: ffff88805e631600 RBX: 0000000000000000 RCX: 0000000000000102 RDX: 0000000000000100 RSI: ffffffff8c27b360 RDI: ffffffff8c27b320 RBP: 0000000000000820 R08: 0000000000000820 R09: 00000000ffffffff R10: 0000000000000015 R11: fffff52000000d7b R12: 0000000000000000 R13: 00000000181414ac R14: ffff88805e631600 R15: 00000000181414ac FS: 00007f074747e6c0(0000) GS:ffff888125463000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f074745dd58 CR3: 0000000036554000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: tun_rx_dst include/net/dst_metadata.h:144 [inline] __ip_tun_set_dst include/net/dst_metadata.h:208 [inline] ip_tun_rx_dst include/net/dst_metadata.h:226 [inline] udp_tun_rx_dst+0x127/0xb30 net/ipv4/udp_tunnel_core.c:215 geneve_rx drivers/net/geneve.c:276 [inline] geneve_udp_encap_recv+0xfbe/0x4160 drivers/net/geneve.c:702 udp_queue_rcv_one_skb+0x172c/0x1a50 net/ipv4/udp.c:2441 udp_unicast_rcv_skb+0x255/0x410 net/ipv4/udp.c:2678 __udp4_lib_rcv+0x1353/0x2630 net/ipv4/udp.c:2754 ip_protocol_deliver_rcu+0x282/0x440 net/ipv4/ip_input.c:207 ip_local_deliver_finish+0x3bb/0x6f0 net/ipv4/ip_input.c:241 NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318 NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318 __netif_receive_skb_one_core net/core/dev.c:6164 [inline] __netif_receive_skb net/core/dev.c:6277 [inline] process_backlog+0xaa3/0x1950 net/core/dev.c:6628 __napi_poll+0xae/0x340 net/core/dev.c:7692 napi_poll net/core/dev.c:7755 [inline] net_rx_action+0x627/0xf70 net/core/dev.c:7912 handle_softirqs+0x22a/0x870 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:__schedule+0x0/0x52d0 kernel/sched/core.c:6762 Code: 81 f6 45 89 f8 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 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 RSP: 0018:ffffc9000d35eb18 EFLAGS: 00000206 RAX: 00000000007770b7 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000007 RSI: ffffffff8def4b65 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff90118bb7 R09: 1ffffffff2023176 R10: dffffc0000000000 R11: fffffbfff2023177 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7235 irqentry_exit+0x599/0x620 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_schedule_notrace+0x0/0x90 kernel/sched/core.c:7157 Code: ff 5b 41 5e 41 5f c3 cc cc cc cc cc 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 41 56 53 65 8b 05 82 bc 6c 07 a9 ff ff ff 7f 75 09 9c RSP: 0018:ffffc9000d35ec40 EFLAGS: 00000246 RAX: b172394212e7dd00 RBX: ffffe8ffffcec010 RCX: f8f8f8f8f8f8f8f8 RDX: ffffc90015804000 RSI: 0000000000008f4d RDI: 0000000000008f4e RBP: ffffc9000d35ec90 R08: ffffc9000d35ea57 R09: 0000000000000000 R10: ffffc9000d35ea48 R11: fffff52001a6bd4b R12: ffffe8ffffcec025 R13: 000000000000000e R14: dffffc0000000000 R15: 1ffff92001a6bd9c preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:469 [inline] perf_trace_lock_acquire+0x3a3/0x440 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+0x2a4/0x2e0 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] class_rcu_constructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495 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 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2692 [inline] slab_free mm/slub.c:6168 [inline] kfree+0x1c1/0x630 mm/slub.c:6486 free_slab_obj_exts mm/slub.c:2258 [inline] unaccount_slab mm/slub.c:3453 [inline] __free_slab+0x149/0x290 mm/slub.c:3557 __slab_free+0x263/0x2b0 mm/slub.c:5576 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:4542 [inline] slab_alloc_node mm/slub.c:4869 [inline] __do_kmalloc_node mm/slub.c:5262 [inline] __kvmalloc_node_noprof+0x4d7/0x8a0 mm/slub.c:6755 kvmalloc_array_node_noprof include/linux/slab.h:1216 [inline] compute_scc+0x102/0xab0 kernel/bpf/verifier.c:25765 bpf_check+0x5ecd/0x1ce00 kernel/bpf/verifier.c:26051 bpf_prog_load+0x1484/0x1ae0 kernel/bpf/syscall.c:3089 __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+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f074659c799 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:00007f074747e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f0746815fa0 RCX: 00007f074659c799 RDX: 0000000000000094 RSI: 0000200000000940 RDI: 0000000000000005 RBP: 00007f0746632c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0746816038 R14: 00007f0746815fa0 R15: 00007ffcb4f8d3f8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 8190 Comm: syz.7.7997 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:__srcu_check_read_flavor+0xe8/0x250 kernel/rcu/srcutree.c:802 Code: c0 74 1d 43 0f b6 0c 2f 84 c9 0f 85 0c 01 00 00 41 0f b6 0e 85 c9 74 08 39 c8 0f 85 b2 00 00 00 83 fb 04 75 17 43 0f b6 0c 2f <84> c9 0f 85 0d 01 00 00 41 80 3e 00 0f 84 80 00 00 00 85 c0 75 19 RSP: 0018:ffffc90000a083b8 EFLAGS: 00000046 RAX: 0000000000000004 RBX: 0000000000000004 RCX: 0000000000000000 RDX: 0000000000010100 RSI: 0000000000000004 RDI: ffffffff8e7bd200 RBP: ffffffff931c6140 R08: ffffc90000a08097 R09: 0000000000000000 R10: ffffc90000a08088 R11: fffff52000141013 R12: ffff8880b8729160 R13: dffffc0000000000 R14: ffffffff8e7bd210 R15: 1ffffffff1cf7a42 FS: 00007f313ea766c0(0000) GS:ffff888125563000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd7f3771700 CR3: 0000000084080000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: srcu_check_read_flavor include/linux/srcutree.h:373 [inline] srcu_read_unlock_fast_notrace include/linux/srcu.h:530 [inline] class_srcu_fast_notrace_destructor include/linux/srcu.h:634 [inline] __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3bc/0x3d0 kernel/locking/lockdep.c:5879 seqcount_lockdep_reader_access+0x64/0x100 include/linux/seqlock.h:74 ktime_get+0x45/0x200 kernel/time/timekeeping.c:824 clockevents_program_event+0xe8/0x350 kernel/time/clockevents.c:326 hrtimer_interrupt+0xb08/0x1010 kernel/time/hrtimer.c:1924 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x102/0x460 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_tp_event+0x29a0/0x2a90 kernel/events/core.c:11442 Code: 28 28 00 00 00 00 4a c7 44 28 30 00 00 00 00 65 48 8b 05 e3 ba 22 11 48 3b 84 24 40 02 00 00 0f 85 e5 00 00 00 48 8d 65 d8 5b <41> 5c 41 5d 41 5e 41 5f 5d e9 42 b3 b7 09 cc e8 4c 88 cc ff e9 88 RSP: 0018:ffffc90000a08728 EFLAGS: 00000246 RAX: f76e904f3f2bee00 RBX: 0000000000000001 RCX: f8f8f8f8f8f8f8f8 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a08748 R08: ffffc90000a08557 R09: 0000000000000000 R10: ffffc90000a08548 R11: fffff520001410ab R12: ffff888059279a10 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8733480 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:11337 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x32d/0x410 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+0x392/0x3d0 kernel/locking/lockdep.c:5879 local_lock_release include/linux/local_lock_internal.h:62 [inline] napi_skb_cache_get+0x3b5/0x780 net/core/skbuff.c:305 __alloc_skb+0x19a/0x7d0 net/core/skbuff.c:696 skb_copy+0x188/0x800 net/core/skbuff.c:2195 mac80211_hwsim_tx_frame_no_nl+0xd00/0x11f0 drivers/net/wireless/virtual/mac80211_hwsim.c:1891 mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2264 mac80211_hwsim_beacon_tx+0x3e8/0x870 drivers/net/wireless/virtual/mac80211_hwsim.c:2365 __iterate_interfaces+0x2ab/0x590 net/mac80211/util.c:760 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:796 mac80211_hwsim_beacon+0xbb/0x180 drivers/net/wireless/virtual/mac80211_hwsim.c:2395 __run_hrtimer kernel/time/hrtimer.c:1785 [inline] __hrtimer_run_queues+0x53a/0xcc0 kernel/time/hrtimer.c:1849 hrtimer_run_softirq+0x182/0x5a0 kernel/time/hrtimer.c:1866 handle_softirqs+0x22a/0x870 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:strlen+0x3f/0x70 lib/string.c:420 Code: 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 <75> de eb 19 89 d9 80 e1 07 38 c1 7c e6 49 89 fc 48 89 df e8 99 5e RSP: 0018:ffffc9000ced7038 EFLAGS: 00000206 RAX: 0000000000000001 RBX: ffffffff8bce0082 RCX: 0000000000000000 RDX: ffffffff81767de5 RSI: ffffffff8e75e3e0 RDI: ffffffff8bce0080 RBP: ffffc9000ced7160 R08: ffffc9000ced7390 R09: 0000000000000000 R10: ffffc9000ced7358 R11: fffff520019dae6d R12: dffffc0000000000 R13: ffffffff81767de5 R14: dffffc0000000000 R15: 0000000000000000 __fortify_strlen include/linux/fortify-string.h:266 [inline] trace_event_get_offsets_lock include/trace/events/lock.h:50 [inline] do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0xd5/0x410 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+0x392/0x3d0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:322 [inline] rcu_read_unlock include/linux/rcupdate.h:881 [inline] class_rcu_destructor include/linux/rcupdate.h:1193 [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 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+0xc2b/0xdb0 mm/page_alloc.c:2978 __kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline] __kasan_populate_vmalloc+0x1b2/0x1d0 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0xd73/0x14b0 mm/vmalloc.c:2129 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3232 __vmalloc_node_range_noprof+0x372/0x1730 mm/vmalloc.c:4024 __vmalloc_node_noprof mm/vmalloc.c:4124 [inline] __vmalloc_noprof+0xd2/0x120 mm/vmalloc.c:4140 bpf_prog_alloc_no_stats+0x4a/0x4f0 kernel/bpf/core.c:107 bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:156 bpf_prog_load+0x7ba/0x1ae0 kernel/bpf/syscall.c:2993 __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+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f313db9c799 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:00007f313ea76028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f313de15fa0 RCX: 00007f313db9c799 RDX: 0000000000000048 RSI: 0000200000000200 RDI: 0000000000000005 RBP: 00007f313dc32c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f313de16038 R14: 00007f313de15fa0 R15: 00007fff8a77b108