watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.7.629:8560] Modules linked in: irq event stamp: 10644355 hardirqs last enabled at (10644354): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (10644355): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (10203890): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (10203890): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (10203890): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (10203893): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (10203893): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (10203893): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 8560 Comm: syz.7.629 Not tainted 6.15.0-rc4-syzkaller-g9325d53fe9ad #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__in6_dev_get include/net/addrconf.h:347 [inline] RIP: 0010:ip6_rcv_core+0x162/0x1590 net/ipv6/ip6_input.c:164 Code: e8 23 14 95 f7 4c 89 64 24 18 4c 8d 7b 10 4c 89 f8 48 c1 e8 03 42 80 3c 30 00 74 08 4c 89 ff e8 64 b5 18 f8 41 bc c0 00 00 00 <4d> 03 27 4c 89 e0 48 c1 e8 03 42 80 3c 30 00 74 08 4c 89 e7 e8 45 RSP: 0018:ffffc90000006eb8 EFLAGS: 00000246 RAX: 1ffff11004fa847a RBX: ffff888027d423c0 RCX: ffff888034a9bc00 RDX: 0000000000000100 RSI: ffffffff8bc1d080 RDI: ffffffff8bc1d040 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8a09223e R12: 00000000000000c0 R13: ffff88807f042000 R14: dffffc0000000000 R15: ffff888027d423d0 FS: 00007f42823f66c0(0000) GS:ffff8881260ca000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fda85691000 CR3: 00000000353e2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: ipv6_rcv+0x72/0xc0 net/ipv6/ip6_input.c:306 __netif_receive_skb_one_core net/core/dev.c:5887 [inline] __netif_receive_skb+0xd3/0x380 net/core/dev.c:6000 netif_receive_skb_internal net/core/dev.c:6086 [inline] netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145 NF_HOOK+0x9d/0x390 include/linux/netfilter.h:315 br_handle_frame_finish+0x1489/0x1950 net/bridge/br_input.c:-1 br_nf_hook_thresh+0x3bf/0x490 net/bridge/br_netfilter_hooks.c:-1 br_nf_pre_routing_finish_ipv6+0x948/0xd00 net/bridge/br_netfilter_ipv6.c:-1 NF_HOOK include/linux/netfilter.h:314 [inline] br_nf_pre_routing_ipv6+0x37e/0x6b0 net/bridge/br_netfilter_ipv6.c:184 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_bridge_pre net/bridge/br_input.c:282 [inline] br_handle_frame+0x97f/0x14c0 net/bridge/br_input.c:433 __netif_receive_skb_core+0x10de/0x4180 net/core/dev.c:5773 __netif_receive_skb_one_core net/core/dev.c:5885 [inline] __netif_receive_skb+0x72/0x380 net/core/dev.c:6000 process_backlog+0x60e/0x14f0 net/core/dev.c:6352 __napi_poll+0xc4/0x480 net/core/dev.c:7324 napi_poll net/core/dev.c:7388 [inline] net_rx_action+0x6ea/0xdf0 net/core/dev.c:7510 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:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7090 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 eb 93 39 f6 e8 86 13 70 f6 fb bf 01 00 00 00 4b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc90003e5f4a0 EFLAGS: 00000286 RAX: b11c61bf3872ca00 RBX: 0000000000000000 RCX: b11c61bf3872ca00 RDX: 0000000000000006 RSI: ffffffff8d74a79b RDI: 0000000000000001 RBP: ffffc90003e5f550 R08: ffffffff8f7ed277 R09: 1ffffffff1efda4e R10: dffffc0000000000 R11: fffffbfff1efda4f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920007cbe94 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:vprintk_emit+0x0/0x7a0 kernel/printk/printk.c:2397 Code: 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 56 40 b5 09 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 RSP: 0018:ffffc90003e5f618 EFLAGS: 00000246 RAX: ffffffff81a0ce42 RBX: dffffc0000000000 RCX: ffffffff8b75afa0 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000 RBP: ffffc90003e5f710 R08: ffffc90003e5f680 R09: 0000000000000000 R10: ffffc90003e5f680 R11: fffff520007cbed3 R12: 1ffff920007cbecc R13: ffffc90003e5f660 R14: ffffc90003e5f680 R15: ffffc90003e5f630 _printk+0xcf/0x120 kernel/printk/printk.c:2475 show_free_areas mm/show_mem.c:382 [inline] __show_mem+0x1be3/0x2210 mm/show_mem.c:407 warn_alloc_show_mem mm/page_alloc.c:3738 [inline] warn_alloc+0x2dd/0x310 mm/page_alloc.c:3763 __vmalloc_node_range_noprof+0x125/0x12c0 mm/vmalloc.c:3781 vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:3996 xskq_create+0xbf/0x170 net/xdp/xsk_queue.c:49 xsk_init_queue+0xb0/0x110 net/xdp/xsk.c:1021 xsk_setsockopt+0x4de/0x710 net/xdp/xsk.c:1366 do_sock_setsockopt+0x257/0x3e0 net/socket.c:2296 __sys_setsockopt net/socket.c:2321 [inline] __do_sys_setsockopt net/socket.c:2327 [inline] __se_sys_setsockopt net/socket.c:2324 [inline] __x64_sys_setsockopt+0x18b/0x220 net/socket.c:2324 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: 0033:0x7f428458e969 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:00007f42823f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f42847b5fa0 RCX: 00007f428458e969 RDX: 0000000000000002 RSI: 000000000000011b RDI: 000000000000000d RBP: 00007f4284610ab1 R08: 0000000000000004 R09: 0000000000000000 R10: 0000200000000900 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f42847b5fa0 R15: 00007ffdc7e4ef68 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7229 Comm: kworker/u8:17 Not tainted 6.15.0-rc4-syzkaller-g9325d53fe9ad #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0xe69/0x11c0 kernel/smp.c:885 Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 20 6d 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 cb 68 0b 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 07 01 00 00 00 74 1e e8 b0 68 0b RSP: 0018:ffffc9000404f700 EFLAGS: 00000293 RAX: ffffffff81b45620 RBX: ffff8880b893ad40 RCX: ffff88802e4cda00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000404f860 R08: ffffffff8f7ed277 R09: 1ffffffff1efda4e R10: dffffc0000000000 R11: fffffbfff1efda4f R12: 1ffff11017108245 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8841228 FS: 0000000000000000(0000) GS:ffff8881261ca000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fda85364e9c CR3: 000000000dd36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2455 [inline] text_poke_bp_batch+0x319/0x940 arch/x86/kernel/alternative.c:2665 text_poke_flush arch/x86/kernel/alternative.c:2856 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2863 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x250 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xad/0x240 mm/kfence/core.c:850 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245