watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.5:21926] Modules linked in: irq event stamp: 61385195 hardirqs last enabled at (61385194): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (61385194): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (61385194): [] ktime_get+0x235/0x2f0 kernel/time/timekeeping.c:756 hardirqs last disabled at (61385195): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (128): [] spin_unlock include/linux/spinlock.h:369 [inline] softirqs last enabled at (128): [] nf_conntrack_double_unlock net/netfilter/nf_conntrack_core.c:119 [inline] softirqs last enabled at (128): [] __nf_conntrack_confirm+0x156f/0x2ff0 net/netfilter/nf_conntrack_core.c:998 softirqs last disabled at (130): [] lwtunnel_xmit_redirect include/net/lwtunnel.h:92 [inline] softirqs last disabled at (130): [] ip_finish_output2+0x28d/0x15a0 net/ipv4/ip_output.c:214 CPU: 0 PID: 21926 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_acquire+0x1ec/0x3c0 kernel/locking/lockdep.c:3911 Code: 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 b7 01 00 00 48 83 3d 09 2e a6 08 00 0f 84 2a 01 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b RSP: 0018:ffff888048e16cf0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: ffff8880b03ac440 RCX: 0000000000002ed7 RDX: dffffc0000000000 RSI: 00000000f652c2f1 RDI: 0000000000000286 RBP: ffff88809860b388 R08: ffffffff8cd2ebf8 R09: 0000000000000003 R10: ffff8880b03acd40 R11: ffffffff8c66501b R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 00007ff8c570c700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020005940 CR3: 000000009a355000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] tcf_police_act+0x7a/0xe60 net/sched/act_police.c:216 tcf_action_exec net/sched/act_api.c:618 [inline] tcf_action_exec+0x160/0x400 net/sched/act_api.c:598 tcf_exts_exec include/net/pkt_cls.h:388 [inline] basic_classify+0x184/0x2b0 net/sched/cls_basic.c:52 tcf_classify+0x120/0x3c0 net/sched/cls_api.c:979 prio_classify net/sched/sch_prio.c:46 [inline] prio_enqueue+0x3bb/0x7a0 net/sched/sch_prio.c:78 __dev_xmit_skb net/core/dev.c:3494 [inline] __dev_queue_xmit+0x140a/0x2e00 net/core/dev.c:3807 neigh_hh_output include/net/neighbour.h:491 [inline] neigh_output include/net/neighbour.h:499 [inline] ip_finish_output2+0xb6d/0x15a0 net/ipv4/ip_output.c:230 ip_finish_output+0xae9/0x10b0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x203/0x5f0 net/ipv4/ip_output.c:406 dst_output include/net/dst.h:455 [inline] ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:125 ip_send_skb+0x3e/0xe0 net/ipv4/ip_output.c:1452 udp_send_skb+0x6a4/0x1170 net/ipv4/udp.c:848 udp_sendmsg+0x1cb4/0x2550 net/ipv4/udp.c:1135 udpv6_sendmsg+0x14b2/0x2ae0 net/ipv6/udp.c:1224 inet_sendmsg+0x132/0x5a0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x3b3/0x8e0 net/socket.c:2227 __sys_sendmmsg+0x195/0x470 net/socket.c:2322 __do_sys_sendmmsg net/socket.c:2351 [inline] __se_sys_sendmmsg net/socket.c:2348 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2348 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff8c719a0d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007ff8c570c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007ff8c72b9f80 RCX: 00007ff8c719a0d9 RDX: 0000000000000001 RSI: 0000000020005940 RDI: 0000000000000003 RBP: 00007ff8c71f5ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd62ed216f R14: 00007ff8c570c300 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