syzbot

watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [swapper/1:0]
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.1.43-syzkaller-00238-g5418491fa533 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:kvm_wait+0x147/0x180 arch/x86/kernel/kvm.c:1066
Code: 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 34 41 0f b6 45 00 44 38 f0 75 10 66 90 0f 00 2d ab 18 11 04 fb f4 <e9> 24 ff ff ff fb e9 1e ff ff ff 44 89 e9 80 e1 07 38 c1 7c a3 4c
RSP: 0018:ffffc900001b01c0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff9200003603c RCX: 1ffffffff0d9bc9d
RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff8881f7137fd4
RBP: ffffc900001b0270 R08: dffffc0000000000 R09: ffffed103ee26ffb
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881f7137fd4 R14: 0000000000000001 R15: 1ffff92000036040
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2be23000 CR3: 000000015adb0000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 pv_wait arch/x86/include/asm/paravirt.h:603 [inline]
 pv_wait_node kernel/locking/qspinlock_paravirt.h:325 [inline]
 __pv_queued_spin_lock_slowpath+0x362/0xda0 kernel/locking/qspinlock.c:476
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock include/linux/spinlock.h:186 [inline]
 __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
 _raw_spin_lock+0x139/0x1b0 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:350 [inline]
 __dev_xmit_skb net/core/dev.c:3861 [inline]
 __dev_queue_xmit+0xd76/0x3700 net/core/dev.c:4234
 dev_queue_xmit include/linux/netdevice.h:3076 [inline]
 neigh_resolve_output+0x6c0/0x7c0 net/core/neighbour.c:1552
 neigh_output include/net/neighbour.h:552 [inline]
 ip6_finish_output2+0x104a/0x1820 net/ipv6/ip6_output.c:134
 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
 ip6_finish_output+0x5d9/0xb60 net/ipv6/ip6_output.c:206
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x1f7/0x4d0 net/ipv6/ip6_output.c:227
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ndisc_send_skb+0x7cf/0xdc0 net/ipv6/ndisc.c:508
 ndisc_send_rs+0x47d/0x5f0 net/ipv6/ndisc.c:718
 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3963
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1480
 expire_timers kernel/time/timer.c:1525 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1796
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1809
 __do_softirq+0x1d8/0x661 kernel/softirq.c:613
 invoke_softirq kernel/softirq.c:468 [inline]
 __irq_exit_rcu+0x50/0xf0 kernel/softirq.c:696
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:708
 sysvec_apic_timer_interrupt+0x9a/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:40 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:75 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:113 [inline]
RIP: 0010:acpi_idle_do_entry drivers/acpi/processor_idle.c:572 [inline]
RIP: 0010:acpi_idle_enter+0x416/0x760 drivers/acpi/processor_idle.c:709
Code: 89 de 48 83 e6 08 31 ff e8 97 6a 79 fc 48 83 e3 08 0f 85 b1 00 00 00 0f 1f 44 00 00 e8 43 66 79 fc 0f 00 2d ec 26 b4 00 fb f4 <fa> e9 e3 00 00 00 49 83 c7 04 4c 89 f8 48 c1 e8 03 42 0f b6 04 30
RSP: 0018:ffffc90000147c50 EFLAGS: 000002d3
RAX: ffffffff84fb968d RBX: 0000000000000000 RCX: ffff888100393cc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000147c90 R08: ffffffff84fb9679 R09: ffffed1020072799
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffff88810089f004 R14: dffffc0000000000 R15: ffff8881098a6064
 cpuidle_enter_state+0x5eb/0x17f0 drivers/cpuidle/cpuidle.c:251
 cpuidle_enter+0x5f/0xa0 drivers/cpuidle/cpuidle.c:369
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x3d1/0x580 kernel/sched/idle.c:303
 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:400
 start_secondary+0xe3/0xf0 arch/x86/kernel/smpboot.c:281
 secondary_startup_64_no_verify+0xce/0xdb
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 12794 Comm: syz-executor.3 Not tainted 6.1.43-syzkaller-00238-g5418491fa533 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:kvm_wait+0x147/0x180 arch/x86/kernel/kvm.c:1066
Code: 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 34 41 0f b6 45 00 44 38 f0 75 10 66 90 0f 00 2d ab 18 11 04 fb f4 <e9> 24 ff ff ff fb e9 1e ff ff ff 44 89 e9 80 e1 07 38 c1 7c a3 4c
RSP: 0018:ffffc900009b6be0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: 1ffff92000136d80 RCX: ffffffff84fbdbec
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffffff873a54ac
RBP: ffffc900009b6c90 R08: dffffc0000000000 R09: fffffbfff0e74a96
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffffff873a54ac R14: 0000000000000003 R15: 1ffff92000136d84
FS:  00007fa72fe836c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020026000 CR3: 00000001412cf000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:603 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x6de/0xda0 kernel/locking/qspinlock.c:511
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock include/linux/spinlock.h:186 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline]
 _raw_spin_lock_bh+0x139/0x1b0 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:355 [inline]
 get_dist_table+0x215/0x2e0 net/sched/sch_netem.c:798
 netem_change+0x9ec/0x20b0 net/sched/sch_netem.c:985
 netem_init+0x5b/0xb0 net/sched/sch_netem.c:1072
 qdisc_create+0x889/0x1160 net/sched/sch_api.c:1314
 tc_modify_qdisc+0x8d0/0x19c0
 rtnetlink_rcv_msg+0x9a5/0xca0 net/core/rtnetlink.c:6103
 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2525
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6121
 netlink_unicast_kernel net/netlink/af_netlink.c:1328 [inline]
 netlink_unicast+0x8ee/0xad0 net/netlink/af_netlink.c:1354
 netlink_sendmsg+0xa15/0xd30 net/netlink/af_netlink.c:1903
 sock_sendmsg_nosec net/socket.c:716 [inline]
 sock_sendmsg net/socket.c:736 [inline]
 ____sys_sendmsg+0x5dc/0x9d0 net/socket.c:2482
 ___sys_sendmsg net/socket.c:2536 [inline]
 __sys_sendmsg+0x2a9/0x390 net/socket.c:2565
 __do_sys_sendmsg net/socket.c:2574 [inline]
 __se_sys_sendmsg net/socket.c:2572 [inline]
 __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2572
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa72f07cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa72fe830c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa72f19c050 RCX: 00007fa72f07cae9
RDX: 0000000000000000 RSI: 0000000020000400 RDI: 0000000000000004
RBP: 00007fa72f0c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa72f19c050 R15: 00007ffee047f548
 </TASK>