IPVS: ftp: loaded support on port[0] = 21 nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.1:11569] Modules linked in: irq event stamp: 52607993 hardirqs last enabled at (52607992): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (52607992): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (52607992): [] ktime_get+0x235/0x2f0 kernel/time/timekeeping.c:756 hardirqs last disabled at (52607993): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (760): [] spin_unlock include/linux/spinlock.h:369 [inline] softirqs last enabled at (760): [] nf_conntrack_double_unlock net/netfilter/nf_conntrack_core.c:119 [inline] softirqs last enabled at (760): [] __nf_conntrack_confirm+0x156f/0x2ff0 net/netfilter/nf_conntrack_core.c:998 softirqs last disabled at (762): [] lwtunnel_xmit_redirect include/net/lwtunnel.h:92 [inline] softirqs last disabled at (762): [] ip_finish_output2+0x28d/0x15a0 net/ipv4/ip_output.c:214 CPU: 1 PID: 11569 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:100 [inline] RIP: 0010:do_raw_spin_unlock+0xdc/0x230 kernel/locking/spinlock_debug.c:134 Code: 85 d6 00 00 00 4c 8d 65 08 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e fc 00 00 00 <65> 8b 05 5d 9f b5 7e 39 45 08 0f 85 b5 00 00 00 48 b8 00 00 00 00 RSP: 0018:ffff8880428f6f40 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff88809e737c80 RCX: ffffffff814be140 RDX: 1ffff11013ce6f9f RSI: 0000000000000004 RDI: ffff88809e737cf0 RBP: ffff88809e737cf0 R08: 0000000000000000 R09: ffffed1013ce6f9e R10: ffff88809e737cf3 R11: ffffffff8c66505b R12: ffff88809e737cf8 R13: ffff88809e737d00 R14: ffff88809e737cf0 R15: ffffffffffe587e6 FS: 00007f18afe2e700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055aa573cba28 CR3: 000000009d3ea000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock+0x1f/0x40 kernel/locking/spinlock.c:176 spin_unlock include/linux/spinlock.h:369 [inline] tcf_police_act+0x786/0xe60 net/sched/act_police.c:268 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_queue_xmit+0x91e/0x1c10 net/ipv4/ip_output.c:507 __tcp_transmit_skb+0x1b9c/0x3400 net/ipv4/tcp_output.c:1148 tcp_transmit_skb net/ipv4/tcp_output.c:1164 [inline] tcp_send_syn_data net/ipv4/tcp_output.c:3489 [inline] tcp_connect+0x1130/0x24e0 net/ipv4/tcp_output.c:3528 tcp_v4_connect+0x140c/0x1aa0 net/ipv4/tcp_ipv4.c:318 __inet_stream_connect+0x7e4/0xe00 net/ipv4/af_inet.c:655 tcp_sendmsg_fastopen net/ipv4/tcp.c:1187 [inline] tcp_sendmsg_locked+0x2267/0x2f60 net/ipv4/tcp.c:1234 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1462 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_sendto+0x21a/0x320 net/socket.c:1899 __do_sys_sendto net/socket.c:1911 [inline] __se_sys_sendto net/socket.c:1907 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1907 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f18b18dd0d9 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:00007f18afe2e168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f18b19fd050 RCX: 00007f18b18dd0d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f18b1938ae9 R08: 00000000200018c0 R09: 0000000000000010 R10: 0000000020020084 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd865156af R14: 00007f18afe2e300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60