RBP: 00007fea2bedaf80 R08: 00007fff5a2410b0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fea2bedaf8c R13: 0000000000000000 R14: 00007fff5a2368c0 R15: 00007fff5a2369a8 watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.0.280:2054] Modules linked in: CPU: 0 PID: 2054 Comm: syz.0.280 Not tainted 5.10.222-syzkaller-01494-gfd58936f3c1f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:ip_list_rcv_finish net/ipv4/ip_input.c:579 [inline] RIP: 0010:ip_sublist_rcv+0x164/0x990 net/ipv4/ip_input.c:616 Code: 48 89 44 24 40 31 c0 48 89 44 24 58 31 c0 48 89 44 24 18 eb 1d e8 3c 30 73 fd 4c 8b 64 24 38 4c 3b 64 24 20 0f 84 23 05 00 00 27 30 73 fd 4d 89 e5 4c 89 e8 48 c1 e8 03 48 89 44 24 60 42 80 RSP: 0018:ffffc900000073c0 EFLAGS: 00000283 RAX: 1ffff11023f916f0 RBX: ffff88811fc8b3c8 RCX: ffff8881240b0000 RDX: 0000000000000101 RSI: ffff88811fc8b780 RDI: ffff88811fc8b3c0 RBP: ffffc90000007530 R08: ffffffff83f77a0c R09: ffffffff83f78a2f R10: 0000000000000002 R11: ffff8881240b0000 R12: ffff88811fc8b140 R13: ffff88811fc8b3c0 R14: dffffc0000000000 R15: ffffc90000007460 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd95328fa8 CR3: 000000012293b000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: ip_list_rcv+0x422/0x470 net/ipv4/ip_input.c:651 __netif_receive_skb_list_ptype net/core/dev.c:5425 [inline] __netif_receive_skb_list_core+0x6b1/0x890 net/core/dev.c:5473 __netif_receive_skb_list net/core/dev.c:5525 [inline] netif_receive_skb_list_internal+0x967/0xcc0 net/core/dev.c:5635 gro_normal_list net/core/dev.c:5789 [inline] gro_normal_one net/core/dev.c:5802 [inline] napi_skb_finish net/core/dev.c:6145 [inline] napi_gro_receive+0x474/0x8e0 net/core/dev.c:6177 receive_buf+0x36c8/0x53d0 drivers/net/virtio_net.c:1157 virtnet_receive drivers/net/virtio_net.c:1421 [inline] virtnet_poll+0x5cf/0x11f0 drivers/net/virtio_net.c:1530 napi_poll net/core/dev.c:6854 [inline] net_rx_action+0x516/0x10d0 net/core/dev.c:6924 __do_softirq+0x268/0x5bb kernel/softirq.c:309 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:405 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1094 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:disconnect_mount fs/namespace.c:1461 [inline] RIP: 0010:umount_tree+0x821/0xef0 fs/namespace.c:1518 Code: ff 4d 8b 36 4c 3b 74 24 08 0f 84 9a 00 00 00 49 83 c6 30 4c 89 f0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 37 06 00 00 45 8b 36 00 00 00 08 44 21 f6 31 ff e8 c0 a9 b1 ff b8 00 00 00 08 41 21 RSP: 0018:ffffc90000f57880 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 1ffff110248423a0 RCX: ffff8881240b0000 RDX: 0000000000000000 RSI: 0000000000000282 RDI: 0000000000000282 RBP: ffffc90000f57958 R08: ffffffff81b901ec R09: ffffc90000f5756c R10: 00000000067a29fd R11: 00000000ea8abafa R12: ffff888124211d00 R13: dffffc0000000000 R14: 0000000008000020 R15: ffff888124211ca8 drop_collected_mounts fs/namespace.c:1921 [inline] put_mnt_ns+0x98/0x1e0 fs/namespace.c:3888 free_nsproxy+0x4c/0x240 kernel/nsproxy.c:196 switch_task_namespaces kernel/nsproxy.c:254 [inline] exit_task_namespaces+0xb4/0xd0 kernel/nsproxy.c:259 do_exit+0xc7e/0x2a50 kernel/exit.c:862 do_group_exit+0x141/0x310 kernel/exit.c:985 get_signal+0x10a0/0x1410 kernel/signal.c:2782 arch_do_signal_or_restart+0xbd/0x17c0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0x9b/0xd0 kernel/entry/common.c:169 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] irqentry_exit_to_user_mode+0x4e/0x80 kernel/entry/common.c:287 irqentry_exit+0x12/0x60 kernel/entry/common.c:375 sysvec_apic_timer_interrupt+0xcb/0xe0 arch/x86/kernel/apic/apic.c:1094 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0033:0x7fea2bd4c9f9 Code: Unable to access opcode bytes at RIP 0x7fea2bd4c9cf. RSP: 002b:00007fea2a9cc0e8 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 00007fea2bedaf88 RCX: 00007fea2bd4c9f9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fea2bedaf8c RBP: 00007fea2bedaf80 R08: 00007fff5a2410b0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fea2bedaf8c R13: 0000000000000000 R14: 00007fff5a2368c0 R15: 00007fff5a2369a8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 110 Comm: kworker/u4:2 Not tainted 5.10.222-syzkaller-01494-gfd58936f3c1f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline] RIP: 0010:smp_call_function_single+0x278/0x510 kernel/smp.c:517 Code: 0f 85 18 02 00 00 44 8b 6c 24 48 44 89 ee 83 e6 01 31 ff e8 2a f1 0a 00 41 83 e5 01 75 0a e8 6f ed 0a 00 e9 eb 00 00 00 f3 90 <42> 0f b6 04 23 84 c0 75 15 f7 44 24 48 01 00 00 00 0f 84 cd 00 00 RSP: 0018:ffffc90000c87720 EFLAGS: 00000293 RAX: ffffffff815fbbb4 RBX: 1ffff92000190eed RCX: ffff88810f65a780 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000c87810 R08: ffffffff815fbb86 R09: ffffed103ee0aec9 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000001 R14: ffffc90000c87768 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f43e0bd6ff8 CR3: 000000000660f000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many_cond+0x94e/0xa30 kernel/smp.c:653 smp_call_function_many kernel/smp.c:716 [inline] smp_call_function kernel/smp.c:738 [inline] on_each_cpu+0xa8/0x1a0 kernel/smp.c:837 text_poke_sync arch/x86/kernel/alternative.c:1318 [inline] text_poke_bp_batch+0x1d4/0x600 arch/x86/kernel/alternative.c:1509 text_poke_flush arch/x86/kernel/alternative.c:1677 [inline] text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1684 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:126 __jump_label_update+0x36a/0x380 kernel/jump_label.c:459 jump_label_update+0x379/0x400 kernel/jump_label.c:825 static_key_enable_cpuslocked+0x12f/0x250 kernel/jump_label.c:177 static_key_enable+0x1a/0x30 kernel/jump_label.c:190 toggle_allocation_gate+0xbf/0x450 mm/kfence/core.c:624 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301 worker_thread+0xaea/0x1510 kernel/workqueue.c:2447 kthread+0x34b/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298