watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.4.13:5952] Modules linked in: irq event stamp: 11437789 hardirqs last enabled at (11437788): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (11437789): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (10846450): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (10846450): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (10846450): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (10846453): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (10846453): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (10846453): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 5952 Comm: syz.4.13 Not tainted 6.15.0-rc3-syzkaller-gf2858f308131 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:queued_write_lock_slowpath+0x120/0x260 kernel/locking/qrwlock.c:85 Code: c9 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 a4 be c9 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:ffffc900000074e0 EFLAGS: 00000206 RAX: 00000000000001ff RBX: ffffffff8f402de0 RCX: ffffffff8b57f3d8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8f402de0 RBP: ffffc90000007590 R08: ffffffff8f402de3 R09: 1ffffffff1e805bc R10: dffffc0000000000 R11: fffffbfff1e805bd R12: dffffc0000000000 R13: 1ffff92000000ea0 R14: ffffc90000007530 R15: 1ffffffff1e805bc FS: 00007f4e402226c0(0000) GS:ffff8881260cf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7f3ebd48e5 CR3: 0000000034bfa000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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_forced_gc net/core/neighbour.c:255 [inline] neigh_alloc net/core/neighbour.c:464 [inline] ___neigh_create+0x209/0x2260 net/core/neighbour.c:607 ip6_finish_output2+0xb4d/0x16a0 net/ipv6/ip6_output.c:132 __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline] ip6_finish_output+0x234/0x7d0 net/ipv6/ip6_output.c:226 NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xb47/0x1400 net/ipv6/ndisc.c:513 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4038 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194 Code: 74 05 e8 3b 70 6f f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 53 f3 38 f6 65 8b 05 5c 45 1d 07 85 c0 74 40 48 c7 04 24 0e 36 RSP: 0018:ffffc90004d9fac0 EFLAGS: 00000206 RAX: d3fa99491fdfa600 RBX: 0000000000000a02 RCX: d3fa99491fdfa600 RDX: 0000000000000000 RSI: ffffffff8d747e01 RDI: 0000000000000001 RBP: ffffc90004d9fb48 R08: ffffffff8f7ebf77 R09: 1ffffffff1efd7ee R10: dffffc0000000000 R11: fffffbfff1efd7ef R12: dffffc0000000000 R13: 1ffff1101710752e R14: ffff888024dca810 R15: 1ffff920009b3f58 class_raw_spinlock_irqsave_destructor include/linux/spinlock.h:557 [inline] try_to_wake_up+0x7b6/0x1290 kernel/sched/core.c:4212 wake_up_process kernel/sched/core.c:4461 [inline] wake_up_q+0xb6/0x110 kernel/sched/core.c:1080 futex_wake+0x458/0x500 kernel/futex/waitwake.c:199 do_futex+0x395/0x420 kernel/futex/syscalls.c:107 __do_sys_futex kernel/futex/syscalls.c:179 [inline] __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:160 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4e3f38e969 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:00007f4e402220e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f4e3f5b5fa8 RCX: 00007f4e3f38e969 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f4e3f5b5fac RBP: 00007f4e3f5b5fa0 R08: 7fffffffffffffff R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 00007f4e3f5b5fac R13: 0000000000000000 R14: 00007ffc201f75f0 R15: 00007ffc201f76d8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5945 Comm: syz.1.12 Not tainted 6.15.0-rc3-syzkaller-gf2858f308131 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:check_preemption_disabled+0x5/0x120 lib/smp_processor_id.c:13 Code: 48 c7 c6 00 c8 c1 8b eb 1c 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 55 41 57 41 56 <53> 48 83 ec 10 65 48 8b 05 4e ae 1f 07 48 89 44 24 08 65 8b 05 56 RSP: 0018:ffffc90000a08278 EFLAGS: 00000007 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff81c73b98 RDX: 0000000000000000 RSI: ffffffff8bc1c800 RDI: ffffffff8bc1c7c0 RBP: 0000000000000000 R08: ffffffff8f7ebf77 R09: 1ffffffff1efd7ee R10: dffffc0000000000 R11: fffffbfff1efd7ef R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f39503e46c0(0000) GS:ffff8881261cf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110e22fff6 CR3: 0000000031dc6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:736 trace_irq_disable+0x37/0x110 include/trace/events/preemptirq.h:36 irqentry_enter+0x3d/0x60 kernel/entry/common.c:297 sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:430 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x6ce/0xb60 kernel/locking/qspinlock.c:325 Code: 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 02 00 00 00 e8 3e c9 c9 f6 48 8d RSP: 0018:ffffc90000a083a0 EFLAGS: 00000206 RAX: 0000000000000000 RBX: ffffffff8f402de4 RCX: 1ffffffff1e805bc RDX: 0000000000000100 RSI: ffffffff8d747e01 RDI: ffff8880b893aa94 RBP: ffffc90000a084b8 R08: ffffffff8f7ebf77 R09: 1ffffffff1efd7ee R10: dffffc0000000000 R11: fffffbfff1efd7ef R12: 1ffffffff1bb48a4 R13: 0000000000000000 R14: 00000000ffff9feb R15: 1ffffffff1e805bc pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:572 [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:641 ip6_finish_output2+0xb4d/0x16a0 net/ipv6/ip6_output.c:132 __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline] ip6_finish_output+0x234/0x7d0 net/ipv6/ip6_output.c:226 NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xb47/0x1400 net/ipv6/ndisc.c:513 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4038 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:kasan_check_range+0x1be/0x2b0 mm/kasan/generic.c:-1 Code: 01 f3 49 8d 5c 24 07 4d 85 e4 49 0f 49 dc 48 83 e3 f8 49 29 dc 74 12 41 80 3b 00 0f 85 b8 00 00 00 49 ff c3 49 ff cc 75 ee 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 45 84 ff 75 63 41 f7 RSP: 0018:ffffc90004e2ee30 EFLAGS: 00000256 RAX: f2f200f2f2f2f201 RBX: 0000000000000010 RCX: ffffffff8b5614ba RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc90004e2f010 RBP: 0000000000000000 R08: ffffc90004e2f01f R09: 1ffff920009c5e03 R10: dffffc0000000000 R11: fffff520009c5e04 R12: 0000000000000002 R13: dffffc0000000000 R14: fffff520009c5e04 R15: 1ffff920009c5e02 __asan_memset+0x22/0x50 mm/kasan/shadow.c:84 __schedule+0xba/0x4cd0 kernel/sched/core.c:6656 preempt_schedule_notrace+0xd1/0x110 kernel/sched/core.c:7040 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:482 [inline] __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3ca/0x3e0 kernel/locking/lockdep.c:5877 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 save_stack+0xf7/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1262 [inline] __free_frozen_pages+0xb0e/0xcd0 mm/page_alloc.c:2725 __folio_put+0x21b/0x2c0 mm/swap.c:112 page_pool_empty_ring net/core/page_pool.c:1044 [inline] page_pool_scrub net/core/page_pool.c:1089 [inline] page_pool_release+0x400/0x8d0 net/core/page_pool.c:1096 page_pool_destroy+0x1d5/0x3f0 net/core/page_pool.c:1173 xdp_test_run_teardown net/bpf/test_run.c:218 [inline] bpf_test_run_xdp_live+0x19da/0x1aa0 net/bpf/test_run.c:396 bpf_prog_test_run_xdp+0x713/0xf90 net/bpf/test_run.c:1316 bpf_prog_test_run+0x2a9/0x340 kernel/bpf/syscall.c:4427 __sys_bpf+0x4a4/0x860 kernel/bpf/syscall.c:5852 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5939 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f394f58e969 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:00007f39503e4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f394f7b5fa0 RCX: 00007f394f58e969 RDX: 0000000000000048 RSI: 0000200000000600 RDI: 000000000000000a RBP: 00007f394f610ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f394f7b5fa0 R15: 00007ffd16b8f338