watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.4.126:6051] Modules linked in: irq event stamp: 15157447 hardirqs last enabled at (15157446): [] asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 hardirqs last disabled at (15157447): [] sysvec_apic_timer_interrupt+0xa/0xc0 arch/x86/kernel/apic/apic.c:1108 softirqs last enabled at (13454): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last enabled at (13454): [] invoke_softirq kernel/softirq.c:450 [inline] softirqs last enabled at (13454): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 softirqs last disabled at (15231): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (15231): [] invoke_softirq kernel/softirq.c:450 [inline] softirqs last disabled at (15231): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 CPU: 1 PID: 6051 Comm: syz.4.126 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:ndisc_send_skb+0xa2e/0x1410 net/ipv6/ndisc.c:511 Code: 58 d1 d2 f8 4d 8d b4 24 e0 06 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 ba ef 17 f9 4d 8b 36 65 49 ff 46 28 <48> 8b 44 24 28 42 0f b6 04 28 84 c0 0f 85 8a 06 00 00 48 8b 44 24 RSP: 0018:ffffc90000dd08a0 EFLAGS: 00000206 RAX: 1ffff1100eb5a6dc RBX: 1ffff1100bd83d40 RCX: ffff88807a44d940 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000dd0a90 R08: ffff888060173837 R09: 1ffff1100c02e706 R10: dffffc0000000000 R11: ffffed100c02e707 R12: ffff888075ad3000 R13: dffffc0000000000 R14: 0000607f46838c60 R15: ffff888061bf53c0 FS: 00007fe89b8556c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe89b834d58 CR3: 00000000633f7000 CR4: 00000000003506e0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3959 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648 expire_timers kernel/time/timer.c:1699 [inline] __run_timers+0x56c/0x810 kernel/time/timer.c:1970 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983 handle_softirqs+0x336/0x830 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:rcu_is_watching+0x63/0xa0 kernel/rcu/tree.c:1124 Code: 89 f7 e8 60 73 59 00 48 c7 c3 08 b3 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 2b 8b 03 65 ff 0d e5 d1 9d 7e <74> 08 24 01 5b 41 5e 41 5f c3 e8 36 df 9b ff eb f1 48 c7 c7 a0 3b RSP: 0018:ffffc90002f2f960 EFLAGS: 00000286 RAX: 0000000000009d2d RBX: ffff8880b913b308 RCX: 6465834ccb53ea00 RDX: 0000000000000000 RSI: ffffffff8a7a2a20 RDI: ffffffff8a7a29e0 RBP: ffffc90002f2faa0 R08: ffffffff8d8aeaef R09: 1ffffffff1b15d5d R10: dffffc0000000000 R11: fffffbfff1b15d5e R12: 1ffff920005e5f3c R13: dffffc0000000000 R14: ffffffff8be3a828 R15: dffffc0000000000 trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0xb5/0x8a0 kernel/locking/lockdep.c:5634 rcu_read_unlock include/linux/rcupdate.h:773 [inline] get_mem_cgroup_from_objcg+0x10e/0x120 mm/memcontrol.c:2817 obj_cgroup_charge_pages+0x76/0x190 mm/memcontrol.c:3016 __memcg_kmem_charge_page+0x2fe/0x380 mm/memcontrol.c:3058 __alloc_pages+0x222/0x480 mm/page_alloc.c:5518 __alloc_pages_node include/linux/gfp.h:570 [inline] alloc_pages_node include/linux/gfp.h:584 [inline] bpf_ringbuf_area_alloc kernel/bpf/ringbuf.c:99 [inline] bpf_ringbuf_alloc+0x94/0x4d0 kernel/bpf/ringbuf.c:136 ringbuf_map_alloc+0x1d1/0x300 kernel/bpf/ringbuf.c:176 find_and_alloc_map kernel/bpf/syscall.c:129 [inline] map_create+0x481/0x2330 kernel/bpf/syscall.c:881 __sys_bpf+0x30a/0x6f0 kernel/bpf/syscall.c:4639 __do_sys_bpf kernel/bpf/syscall.c:4761 [inline] __se_sys_bpf kernel/bpf/syscall.c:4759 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fe89d61de59 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:00007fe89b855028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fe89d8a6090 RCX: 00007fe89d61de59 RDX: 0000000000000048 RSI: 0000200000000040 RDI: 1900000000000000 RBP: 00007fe89d6b3e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe89d8a6128 R14: 00007fe89d8a6090 R15: 00007ffc350f5ce8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xb/0x10 arch/x86/kernel/process.c:729