watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.8.1503:11797] Modules linked in: irq event stamp: 14140599 hardirqs last enabled at (14140598): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (14140599): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (13973564): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (13973564): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (13973564): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (13973567): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (13973567): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (13973567): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 11797 Comm: syz.8.1503 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:queued_write_lock_slowpath+0x120/0x260 kernel/locking/qrwlock.c:85 Code: dc f6 f0 81 0b 00 01 00 00 43 0f b6 04 27 84 c0 74 35 89 d9 80 e1 07 80 c1 03 38 c1 7c 29 48 89 df e8 f4 94 dc f6 eb 1f f3 90 <43> 0f b6 04 27 84 c0 74 14 89 d9 80 e1 07 80 c1 03 38 c1 7c 08 48 RSP: 0018:ffffc90000a084c0 EFLAGS: 00000206 RAX: 00000000000001ff RBX: ffffffff8f3de140 RCX: ffffffff8b493058 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8f3de140 RBP: ffffc90000a08570 R08: ffffffff8f3de143 R09: 1ffffffff1e7bc28 R10: dffffc0000000000 R11: fffffbfff1e7bc29 R12: dffffc0000000000 R13: 1ffff9200014109c R14: ffffc90000a08510 R15: 1ffffffff1e7bc28 FS: 00007f1429af56c0(0000) GS:ffff88812623b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1429ad4d58 CR3: 00000000481e8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: queued_write_lock include/asm-generic/qrwlock.h:101 [inline] do_raw_write_lock+0x1f2/0x260 kernel/locking/spinlock_debug.c:211 ___neigh_create+0xe81/0x2260 net/core/neighbour.c:690 ip6_finish_output2+0x1175/0x1480 net/ipv6/ip6_output.c:128 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247 NF_HOOK include/linux/netfilter.h:318 [inline] ndisc_send_skb+0xbce/0x1510 net/ipv6/ndisc.c:512 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4037 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 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:tracing_generic_entry_update include/linux/trace_events.h:177 [inline] RIP: 0010:perf_trace_buf_update+0x9f/0x220 kernel/trace/trace_event_perf.c:429 Code: 40 00 00 00 00 9c 8f 44 24 40 be 00 02 00 00 45 31 ff 48 23 74 24 40 41 0f 94 c7 31 ff e8 79 5f f6 ff 44 89 ff e8 e1 a3 fa ff <4c> 8d 7b 03 4c 89 f9 48 c1 e9 03 42 0f b6 0c 21 84 c9 0f 85 b4 00 RSP: 0018:ffffc9000531f2c0 EFLAGS: 00000202 RAX: 0000000000240001 RBX: ffffe8ffffba62a8 RCX: 0000000000000002 RDX: ffff8880270c1e40 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000531f370 R08: ffffc9000531f54f R09: 0000000000000000 R10: ffffc9000531f540 R11: fffff52000a63eaa R12: dffffc0000000000 R13: 1ffff92000a63e5c R14: 00000000000000eb R15: 0000000000000000 perf_tp_event+0xf6/0x1380 kernel/events/core.c:10998 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:10936 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 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+0x311/0x360 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] is_module_text_address+0x39/0x1e0 kernel/module/main.c:3845 kernel_text_address+0x94/0xe0 kernel/extable.c:119 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26 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 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4978 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_lru_noprof+0x35d/0x6d0 mm/slub.c:5307 __d_alloc+0x36/0x7a0 fs/dcache.c:1690 d_alloc_pseudo+0x21/0xc0 fs/dcache.c:1821 alloc_path_pseudo fs/file_table.c:363 [inline] alloc_file_pseudo+0xcc/0x210 fs/file_table.c:379 sock_alloc_file+0xb8/0x2e0 net/socket.c:483 sock_map_fd net/socket.c:513 [inline] __sys_socket+0x13d/0x1b0 net/socket.c:1756 __do_sys_socket net/socket.c:1761 [inline] __se_sys_socket net/socket.c:1759 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1759 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: 0033:0x7f1428b8f6c9 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:00007f1429af5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f1428de5fa0 RCX: 00007f1428b8f6c9 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000010 RBP: 00007f1428c11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1428de6038 R14: 00007f1428de5fa0 R15: 00007fff4a7b87c8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 11799 Comm: syz.9.1504 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 arch/x86/include/asm/idtentry.h:697 Code: 36 56 46 0a e9 61 06 00 00 90 f3 0f 1e fa 0f 01 ca fc 6a ff e8 11 05 00 00 48 89 c4 48 89 e7 e8 46 55 46 0a e9 41 06 00 00 90 0f 1e fa 0f 01 ca fc 6a ff e8 f1 04 00 00 48 89 c4 48 89 e7 e8 RSP: 0018:ffffc90000007358 EFLAGS: 00000086 RAX: 0000000000000000 RBX: ffffffff8f3de144 RCX: 1ffffffff1e7bc28 RDX: 0000000000000100 RSI: ffffffff8d70e261 RDI: ffff8880b883af94 RBP: ffffc90000007498 R08: ffffffff8f7cea77 R09: 1ffffffff1ef9d4e R10: dffffc0000000000 R11: fffffbfff1ef9d4f R12: 1ffffffff1bb51bc R13: 0000000000000000 R14: 00000000ffffb93f R15: 1ffffffff1e7bc28 FS: 00007f29b6aa26c0(0000) GS:ffff88812613b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f29b6a81d58 CR3: 00000000599ee000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:124 [inline] RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:431 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x6c3/0xb60 kernel/locking/qspinlock.c:325 Code: 60 01 00 00 c6 01 01 41 be 00 80 ff ff 66 c7 84 24 90 00 00 00 00 01 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 20 0f b6 04 01 <84> c0 75 46 80 3b 00 74 09 f3 90 41 ff c6 75 d3 eb 4b 48 89 df be RSP: 0018:ffffc90000007380 EFLAGS: 00000286 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [inline] queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] queued_write_lock_slowpath+0x22c/0x260 kernel/locking/qrwlock.c:73 queued_write_lock include/asm-generic/qrwlock.h:101 [inline] do_raw_write_lock+0x1f2/0x260 kernel/locking/spinlock_debug.c:211 ___neigh_create+0xe81/0x2260 net/core/neighbour.c:690 ip6_finish_output2+0x1175/0x1480 net/ipv6/ip6_output.c:128 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247 NF_HOOK include/linux/netfilter.h:318 [inline] ndisc_send_skb+0xbce/0x1510 net/ipv6/ndisc.c:512 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4037 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 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:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] RIP: 0010:rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:751 Code: 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 ff 05 c0 00 c8 10 e8 8b 3b a0 09 <89> c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd d0 RSP: 0018:ffffc90005347748 EFLAGS: 00000282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: d20b2214b6667a00 RDX: 0000000000000000 RSI: ffffffff8bbf0740 RDI: ffffffff8bbf0700 RBP: ffffc90005347990 R08: ffffffff8f7cea77 R09: 1ffffffff1ef9d4e R10: dffffc0000000000 R11: fffffbfff1ef9d4f R12: dffffc0000000000 R13: 1ffff1101710756e R14: ffff88801ffe9e40 R15: ffff888028ddf08c trace_sched_exit_tp+0x36/0x110 include/trace/events/sched.h:886 __schedule+0x17ae/0x4cc0 kernel/sched/core.c:6939 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 percpu_down_read_internal include/linux/percpu-rwsem.h:72 [inline] percpu_down_read include/linux/percpu-rwsem.h:77 [inline] cgroup_threadgroup_change_begin include/linux/cgroup-defs.h:875 [inline] exit_signals+0x49b/0x600 kernel/signal.c:3125 do_exit+0x352/0x2300 kernel/exit.c:913 do_group_exit+0x21c/0x2d0 kernel/exit.c:1107 get_signal+0x1285/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40 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: 0033:0x7f29b5b8f6c9 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:00007f29b6aa2038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 0000000000000008 RBX: 00007f29b5de5fa0 RCX: 00007f29b5b8f6c9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000040 RBP: 00007f29b5c11f91 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f29b5de6038 R14: 00007f29b5de5fa0 R15: 00007fffd74f47a8