syzbot

RBP: 0000000000000000 R08: 0000000000000000 R09: 0000555556192610
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffda180ddc0
 </TASK>
watchdog: BUG: soft lockup - CPU#1 stuck for 245s! [syz-executor316:296]
Modules linked in:
CPU: 1 PID: 296 Comm: syz-executor316 Not tainted 6.1.43-syzkaller-00029-gdf6e6fc38f4f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
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:ffffc90000e46be0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: 1ffff920001c8d80 RCX: ffffffff84fc0c6c
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffffff873a562c
RBP: ffffc90000e46c90 R08: dffffc0000000000 R09: fffffbfff0e74ac6
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffffff873a562c R14: 0000000000000003 R15: 1ffff920001c8d84
FS:  0000555556191380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000121f24000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <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: 0033:0x7f8069f41fc9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffda180dda8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f8069f41fc9
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000555556192610
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffda180ddc0
 </TASK>