watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.7.10263:12966] Modules linked in: irq event stamp: 14826825 hardirqs last enabled at (14826824): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (14826825): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (14761596): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (14761596): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (14761596): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (14761599): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (14761599): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (14761599): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 12966 Comm: syz.7.10263 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline] RIP: 0010:lock_acquire+0x58/0x330 kernel/locking/lockdep.c:5831 Code: 8b 05 2c 06 55 11 48 89 44 24 58 e9 16 02 00 00 65 8b 05 2f 06 55 11 83 f8 08 0f 83 83 01 00 00 89 c0 48 0f a3 05 58 9c 4f 0e <73> 0d e8 c1 1e 09 00 84 c0 0f 84 ca 01 00 00 83 3d 82 ce 4f 0e 00 RSP: 0018:ffffc90000a08378 EFLAGS: 00000297 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000102 RDX: 0000000000000000 RSI: ffffffff8c076260 RDI: ffffffff8c076220 RBP: ffffffff8175b275 R08: 0000000000000002 R09: 0000000000000000 R10: ffffc90000a08548 R11: fffff520001410b5 R12: 0000000000000002 R13: ffffffff8e55df20 R14: 0000000000000000 R15: 0000000000000000 FS: 00007ffbf97036c0(0000) GS:ffff8881257c8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ed51f00000 CR3: 00000000af070000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: 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 __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 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] __kmalloc_cache_noprof+0x3d1/0x6e0 mm/slub.c:5780 kmalloc_noprof include/linux/slab.h:958 [inline] dst_cow_metrics_generic+0x56/0x1c0 net/core/dst.c:194 dst_metrics_write_ptr include/net/dst.h:136 [inline] dst_metric_set include/net/dst.h:197 [inline] icmp6_dst_alloc+0x265/0x440 net/ipv6/route.c:3346 ndisc_send_skb+0x42d/0x14e0 net/ipv6/ndisc.c:491 addrconf_rs_timer+0x395/0x6d0 net/ipv6/addrconf.c:4037 call_timer_fn+0x192/0x5a0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404 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:__schedule+0x11/0x5260 kernel/sched/core.c:6762 Code: 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 c0 01 00 00 41 89 fd 65 48 8b 05 b9 34 59 07 RSP: 0018:ffffc9000450f858 EFLAGS: 00000206 RAX: 00000000004a34d7 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000006 RSI: ffffffff8dcd201e RDI: 0000000000000001 RBP: ffffc9000450f880 R08: ffffffff8ff01677 R09: 1ffffffff1fe02ce R10: dffffc0000000000 R11: fffffbfff1fe02cf R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7234 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:notifier_call_chain+0x90/0x3a0 kernel/notifier.c:75 Code: 96 ac 33 00 45 31 ed e9 0b 03 00 00 48 8b 04 24 48 c1 e8 03 48 89 44 24 18 49 8d 7c 24 08 48 89 f8 48 c1 e8 03 42 80 3c 30 00 <74> 05 e8 79 d8 9c 00 49 8b 44 24 08 48 89 44 24 08 4d 89 e7 49 c1 RSP: 0018:ffffc9000450f9b8 EFLAGS: 00000246 RAX: 1ffffffff1f7f031 RBX: ffffffff8fbf8180 RCX: 0000000000080000 RDX: ffffc9000cf09000 RSI: 0000000000003003 RDI: ffffffff8fbf8188 RBP: 00000000ffffffb3 R08: ffffffff8ff01677 R09: 1ffffffff1fe02ce R10: dffffc0000000000 R11: ffffffff8ac78c90 R12: ffffffff8fbf8180 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffffffff1f7d160 call_netdevice_notifiers_extack net/core/dev.c:2281 [inline] __dev_open+0x1fe/0x830 net/core/dev.c:1683 __dev_change_flags+0x1f7/0x690 net/core/dev.c:9749 netif_change_flags+0x88/0x1a0 net/core/dev.c:9812 dev_change_flags+0x130/0x260 net/core/dev_api.c:68 dev_ioctl+0x7b4/0x1150 net/core/dev_ioctl.c:842 sock_do_ioctl+0x23e/0x320 net/socket.c:1268 sock_ioctl+0x5c6/0x7f0 net/socket.c:1375 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+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ffbf879bf79 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:00007ffbf9703028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffbf8a15fa0 RCX: 00007ffbf879bf79 RDX: 0000200000000140 RSI: 0000000000008914 RDI: 0000000000000005 RBP: 00007ffbf88327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffbf8a16038 R14: 00007ffbf8a15fa0 R15: 00007ffd873c01e8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 12968 Comm: syz.0.10264 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:perf_guest_state include/linux/perf_event.h:1695 [inline] RIP: 0010:should_sample_guest kernel/events/core.c:7714 [inline] RIP: 0010:perf_instruction_pointer kernel/events/core.c:7729 [inline] RIP: 0010:perf_prepare_sample+0x1d3/0x22d0 kernel/events/core.c:8569 Code: 4c 89 f7 e8 5f 26 37 00 4d 8b 36 4c 89 f6 48 81 e6 00 00 10 00 31 ff e8 1b ff cd ff 49 81 e6 00 00 10 00 75 22 e8 fd 24 49 ff <41> 89 c6 31 ff 89 c6 e8 61 fe cd ff 45 85 f6 74 13 e8 17 fa cd ff RSP: 0018:ffffc90000006c20 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000009049 RCX: ffff888024de3c80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000006d10 R08: ffffffff81f6a809 R09: ffffffff8e55df20 R10: dffffc0000000000 R11: ffffffff81f6a750 R12: ffff88807b1e26a0 R13: 1ffff1100f63c4d4 R14: 0000000000000000 R15: ffffc90000007100 FS: 00007fe1d262e6c0(0000) GS:ffff8881256c8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe8b46f1c8 CR3: 0000000030304000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __perf_event_output kernel/events/core.c:8805 [inline] perf_event_output_forward+0x17d/0x480 kernel/events/core.c:8826 __perf_event_overflow+0x87a/0xec0 kernel/events/core.c:10762 perf_swevent_overflow kernel/events/core.c:10837 [inline] perf_swevent_event+0x323/0x650 kernel/events/core.c:-1 perf_tp_event+0x571/0x29b0 kernel/events/core.c:11382 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:11306 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x33e/0x420 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+0x2ea/0x330 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 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_node_noprof+0x427/0x6f0 mm/slub.c:5315 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:586 __alloc_skb+0x204/0x390 net/core/skbuff.c:690 __netdev_alloc_skb+0xc1/0x850 net/core/skbuff.c:754 netdev_alloc_skb include/linux/skbuff.h:3484 [inline] dev_alloc_skb include/linux/skbuff.h:3497 [inline] hsr_init_skb+0xef/0x6e0 net/hsr/hsr_device.c:267 send_hsr_supervision_frame+0x143/0xcb0 net/hsr/hsr_device.c:316 hsr_announce+0x1db/0x370 net/hsr/hsr_device.c:421 call_timer_fn+0x192/0x5a0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404 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:kasan_check_range+0x1c7/0x2c0 mm/kasan/generic.c:200 Code: f4 49 01 dc 4d 01 f3 49 8d 5c 24 07 4d 85 e4 49 0f 49 dc 48 83 e3 f8 49 29 dc 74 0e 41 80 3b 00 75 7c 49 ff c3 49 ff cc 75 f2 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 45 84 ff 0f 85 a1 RSP: 0018:ffffc90004ad6248 EFLAGS: 00000256 RAX: ffffffff81fb5101 RBX: 0000000000000000 RCX: ffffffff81fb525e RDX: 0000000000000001 RSI: 0000000000000018 RDI: ffffc90004ad6380 RBP: 0000000000000000 R08: ffffc90004ad6397 R09: 1ffff9200095ac72 R10: dffffc0000000000 R11: fffff5200095ac73 R12: 0000000000000003 R13: dffffc0000000000 R14: fffff5200095ac73 R15: 1ffff9200095ac70 __asan_memset+0x22/0x50 mm/kasan/shadow.c:84 __perf_output_begin kernel/events/ring_buffer.c:165 [inline] perf_output_begin_forward+0x17e/0xab0 kernel/events/ring_buffer.c:277 __perf_event_output kernel/events/core.c:8808 [inline] perf_event_output_forward+0x2d4/0x480 kernel/events/core.c:8826 __perf_event_overflow+0x87a/0xec0 kernel/events/core.c:10762 perf_swevent_overflow kernel/events/core.c:10837 [inline] perf_swevent_event+0x323/0x650 kernel/events/core.c:-1 perf_tp_event+0x571/0x29b0 kernel/events/core.c:11382 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:11306 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x33e/0x420 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+0x2ea/0x330 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 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+0xbf8/0xd70 mm/page_alloc.c:2973 ___free_pages_bulk mm/kasan/shadow.c:333 [inline] __kasan_populate_vmalloc_do mm/kasan/shadow.c:385 [inline] __kasan_populate_vmalloc+0x137/0x1d0 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+0xb2/0xe0 mm/vmalloc.c:4146 bpf_prog_calc_tag+0x4c/0x370 kernel/bpf/core.c:307 resolve_pseudo_ldimm64+0xbd/0xc90 kernel/bpf/verifier.c:21693 bpf_check+0x1d82/0x1ce00 kernel/bpf/verifier.c:25951 bpf_prog_load+0x1484/0x1ae0 kernel/bpf/syscall.c:3088 __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: 0033:0x7fe1d179bf79 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:00007fe1d262e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fe1d1a15fa0 RCX: 00007fe1d179bf79 RDX: 0000000000000094 RSI: 0000200000000880 RDI: 0000000000000005 RBP: 00007fe1d18327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe1d1a16038 R14: 00007fe1d1a15fa0 R15: 00007fff27f01458