watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:6168] Modules linked in: irq event stamp: 2553033 hardirqs last enabled at (2553032): [] enqueue_to_backlog+0xb21/0xe00 net/core/dev.c:4242 hardirqs last disabled at (2553033): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2540452): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2540455): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2540455): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 6168 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:enqueue_to_backlog+0xb59/0xe00 net/core/dev.c:4242 Code: fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 6a 02 00 00 48 83 3d 70 c1 7c 03 00 0f 84 17 01 00 00 e8 4d c4 ed fa 48 8b 3c 24 57 9d <0f> 1f 44 00 00 45 31 e4 e9 0c f7 ff ff e8 35 c4 ed fa 0f 0b e8 2e RSP: 0018:ffff8880ba007408 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: ffff8880b3178000 RBX: 0000000000000200 RCX: 1ffff1101662f11a RDX: 0000000000000100 RSI: ffffffff8674c123 RDI: 0000000000000206 RBP: 000000000000bd4d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ba02c490 R13: ffff888022f89dc0 R14: ffff8880ba02c478 R15: 00000000000001f4 FS: 00007f1e37bc5700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32028000 CR3: 0000000015091000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: netif_rx_internal+0xfd/0x670 net/core/dev.c:4491 veth_forward_skb drivers/net/veth.c:176 [inline] veth_xmit+0x1eb/0x800 drivers/net/veth.c:203 __netdev_start_xmit include/linux/netdevice.h:4349 [inline] netdev_start_xmit include/linux/netdevice.h:4363 [inline] xmit_one net/core/dev.c:3256 [inline] dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 __dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 neigh_resolve_output+0x55a/0x910 net/core/neighbour.c:1374 neigh_output include/net/neighbour.h:501 [inline] ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:455 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] ndisc_send_skb+0xa24/0x1720 net/ipv6/ndisc.c:491 ndisc_send_rs+0x131/0x690 net/ipv6/ndisc.c:685 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:native_local_ptep_get_and_clear arch/x86/include/asm/pgtable.h:1041 [inline] RIP: 0010:ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1123 [inline] RIP: 0010:zap_pte_range mm/memory.c:1334 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1463 [inline] RIP: 0010:zap_pud_range mm/memory.c:1492 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1513 [inline] RIP: 0010:unmap_page_range+0x11b3/0x2c50 mm/memory.c:1534 Code: e3 01 89 de e8 0e e9 d6 ff 84 db 0f 84 fc 07 00 00 e8 d1 e7 d6 ff 48 8b 44 24 30 48 c1 e8 03 42 80 3c 30 00 0f 85 41 1a 00 00 <48> 8b 44 24 30 48 8b 08 48 c7 00 00 00 00 00 48 89 8c 24 b8 00 00 RSP: 0018:ffff8880afd27770 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff110072f0aba RBX: 0000000000000001 RCX: ffffffff818b9d92 RDX: 0000000000000000 RSI: ffffffff818b9d9f RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 8000000097948007 R13: ffffea00025e5200 R14: dffffc0000000000 R15: 00007f1e390bb000 unmap_single_vma+0x198/0x300 mm/memory.c:1579 unmap_vmas+0xa9/0x180 mm/memory.c:1609 exit_mmap+0x2b9/0x530 mm/mmap.c:3093 __mmput kernel/fork.c:1016 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1037 exit_mm kernel/exit.c:549 [inline] do_exit+0xaec/0x2be0 kernel/exit.c:857 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f1e3924fe99 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1e37bc5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: 0000000000000070 RBX: 00007f1e39362f60 RCX: 00007f1e3924fe99 RDX: 0400000000000070 RSI: 0000000020007fc0 RDI: 0000000000000006 RBP: 00007f1e392a9ff1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000200000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffff95ee27f R14: 00007f1e37bc5300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: df 48 c1 fisttps -0x3f(%rax) 3: e8 03 80 3c 10 callq 0x103c800b 8: 00 0f add %cl,(%rdi) a: 85 6a 02 test %ebp,0x2(%rdx) d: 00 00 add %al,(%rax) f: 48 83 3d 70 c1 7c 03 cmpq $0x0,0x37cc170(%rip) # 0x37cc187 16: 00 17: 0f 84 17 01 00 00 je 0x134 1d: e8 4d c4 ed fa callq 0xfaedc46f 22: 48 8b 3c 24 mov (%rsp),%rdi 26: 57 push %rdi 27: 9d popfq * 28: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2d: 45 31 e4 xor %r12d,%r12d 30: e9 0c f7 ff ff jmpq 0xfffff741 35: e8 35 c4 ed fa callq 0xfaedc46f 3a: 0f 0b ud2 3c: e8 .byte 0xe8 3d: 2e cs