watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz.4.2069:15297] Modules linked in: irq event stamp: 12923033 hardirqs last enabled at (12923032): [] irqentry_exit+0x5dd/0x660 kernel/entry/common.c:219 hardirqs last disabled at (12923033): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (246170): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (246170): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (246170): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (246173): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (246173): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (246173): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 15297 Comm: syz.4.2069 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:check_new_pages mm/page_alloc.c:-1 [inline] RIP: 0010:__rmqueue_pcplist+0x19a6/0x1df0 mm/page_alloc.c:3274 Code: e9 8d eb ff ff 41 88 df 48 8b 44 24 10 48 8b 40 f8 48 b9 ff ff ff 00 80 0f 00 00 48 21 c8 49 09 c5 4d 09 fd 0f 85 d5 01 00 00 <4c> 8b 64 24 20 83 7c 24 0c 20 0f 83 6a 01 00 00 49 8d 4c 24 40 48 RSP: 0018:ffffc900000071e0 EFLAGS: 00000213 RAX: ffffea0000e93980 RBX: 00000000ffffffff RCX: 0000000000000000 RDX: 0000000000000000 RSI: 1ffffffff1f01152 RDI: ffffea0000e93990 RBP: ffffc900000073d0 R08: 0000000000000180 R09: 0000000000000080 R10: dffffc0000000000 R11: ffffffff8b771224 R12: ffff8880b8840a40 R13: 1ffff92000000e64 R14: ffffea0000e93988 R15: ffffea0000e93990 FS: 00007ff832a3d6c0(0000) GS:ffff8881260b1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c33592f CR3: 00000000611ec000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0100000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rmqueue_pcplist mm/page_alloc.c:3304 [inline] rmqueue mm/page_alloc.c:3335 [inline] get_page_from_freelist+0x91f/0x2440 mm/page_alloc.c:3876 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:3075 [inline] allocate_slab+0x86/0x3b0 mm/slub.c:3248 new_slab mm/slub.c:3302 [inline] ___slab_alloc+0xf2b/0x1960 mm/slub.c:4651 __slab_alloc+0x65/0x100 mm/slub.c:4774 __slab_alloc_node mm/slub.c:4850 [inline] slab_alloc_node mm/slub.c:5246 [inline] kmem_cache_alloc_node_noprof+0x4c5/0x710 mm/slub.c:5310 __alloc_skb+0x255/0x430 net/core/skbuff.c:679 alloc_skb include/linux/skbuff.h:1383 [inline] ndisc_alloc_skb+0x9f/0x480 net/ipv6/ndisc.c:420 ndisc_send_rs+0x2b5/0x630 net/ipv6/ndisc.c:706 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4037 call_timer_fn+0x16e/0x590 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404 handle_softirqs+0x27d/0x850 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: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:finish_task_switch+0x242/0x940 kernel/sched/core.c:5114 Code: 0f 84 c2 01 00 00 48 85 db 0f 85 e9 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 68 13 ba 09 e8 33 3e 37 00 fb 4c 8b 65 c0 <49> 8d bc 24 48 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc9000eb67438 EFLAGS: 00000282 RAX: 8a2f6b777a247400 RBX: 0000000000000000 RCX: 8a2f6b777a247400 RDX: 0000000000000000 RSI: ffffffff8d76bd39 RDI: ffffffff8bbfc660 RBP: ffffc9000eb67490 R08: ffffffff8f805a77 R09: 1ffffffff1f00b4e R10: dffffc0000000000 R11: fffffbfff1f00b4f R12: ffff888080cbdb80 R13: dffffc0000000000 R14: ffff88807dc13d00 R15: ffff8880b883b358 context_switch kernel/sched/core.c:5259 [inline] __schedule+0x14c4/0x5000 kernel/sched/core.c:6863 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7190 irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:slab_alloc_node mm/slub.c:5246 [inline] RIP: 0010:__do_kmalloc_node mm/slub.c:5651 [inline] RIP: 0010:__kvmalloc_node_noprof+0x3d3/0x910 mm/slub.c:7128 Code: db 74 12 48 8b 0b 48 c1 e9 3a 48 0f a3 48 08 0f 82 76 ff ff ff e8 cd c1 07 00 41 89 c0 e9 69 ff ff ff 41 8b 45 40 0f 0d 0c 03 <4c> 89 7c 24 38 0f 1f 44 00 00 66 90 49 83 7d 60 00 74 08 45 31 f6 RSP: 0018:ffffc9000eb67878 EFLAGS: 00000282 RAX: ffff888058cd8300 RBX: ffffea0001e20000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8d76bd39 RDI: 00000000ffffffff RBP: 0000000000000cc0 R08: ffffffff8f805a77 R09: 1ffffffff1f00b4e R10: dffffc0000000000 R11: fffffbfff1f00b4f R12: 0000000000000080 R13: ffff88801a026a00 R14: 0000000000041a78 R15: ffff888058cd8300 bpf_jit_binary_pack_alloc+0x143/0x340 kernel/bpf/core.c:1134 bpf_int_jit_compile+0x831/0x14b0 arch/x86/net/bpf_jit_comp.c:3816 bpf_prog_select_runtime+0x4a3/0x820 kernel/bpf/core.c:2526 bpf_prog_load+0x13e9/0x1a10 kernel/bpf/syscall.c:3092 __sys_bpf+0x507/0x860 kernel/bpf/syscall.c:6164 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline] __se_sys_bpf kernel/bpf/syscall.c:6272 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6272 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff831b8f749 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:00007ff832a3d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007ff831de5fa0 RCX: 00007ff831b8f749 RDX: 0000000000000094 RSI: 0000200000000b00 RDI: 0000000000000005 RBP: 00007ff831c13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff831de6038 R14: 00007ff831de5fa0 R15: 00007ffcd01bc968 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6033 Comm: kworker/u8:16 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xccf/0x12b0 kernel/smp.c:877 Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 4a 94 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 f5 8f 0b 00 eb 38 f3 90 <42> 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 d9 8f RSP: 0018:ffffc900051f7620 EFLAGS: 00000293 RAX: ffffffff81b5ba87 RBX: 1ffff11017108545 RCX: ffff88802fd71e80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900051f77a0 R08: ffffffff8f805a77 R09: 1ffffffff1f00b4e R10: dffffc0000000000 R11: fffffbfff1f00b4f R12: ffff8880b8842a28 R13: dffffc0000000000 R14: ffff8880b893b9c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881261b1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055559153c5c8 CR3: 000000000dd3a000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2711 [inline] smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2921 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x240 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xad/0x240 mm/kfence/core.c:854 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246