------------[ cut here ]------------ WARNING: CPU: 1 PID: 9836 at net/ipv4/tcp_timer.c:429 tcp_retransmit_timer+0x1ac5/0x2560 net/ipv4/tcp_timer.c:429 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 9836 Comm: syz-executor.1 Not tainted 4.14.144 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x197 lib/dump_stack.c:53 panic+0x1f2/0x426 kernel/panic.c:182 __warn.cold+0x2f/0x36 kernel/panic.c:546 report_bug+0x216/0x254 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963 RIP: 0010:tcp_retransmit_timer+0x1ac5/0x2560 net/ipv4/tcp_timer.c:429 RSP: 0018:ffff8880aef07cd8 EFLAGS: 00010206 RAX: ffff888071abe340 RBX: ffff88807f790380 RCX: 000000000000000a RDX: 0000000000000100 RSI: ffff88809755ebcc RDI: ffff88809755ed98 RBP: ffff8880aef07d38 R08: 000000d86557e18b R09: ffff88821fff8048 R10: ffff88821fff8050 R11: 0000000000000001 R12: ffff88809755e3c0 R13: ffff88809755ea5a R14: ffff88809755e3f0 R15: 0000000000000000 tcp_write_timer_handler+0x479/0x7e0 net/ipv4/tcp_timer.c:579 tcp_write_timer+0xd8/0x180 net/ipv4/tcp_timer.c:597 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1634 [inline] __run_timers kernel/time/timer.c:1602 [inline] run_timer_softirq+0x5b4/0x1570 kernel/time/timer.c:1647 __do_softirq+0x244/0x9a0 kernel/softirq.c:288 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1015 do_softirq.part.0+0x10e/0x160 kernel/softirq.c:332 do_softirq kernel/softirq.c:324 [inline] __local_bh_enable_ip+0x154/0x1a0 kernel/softirq.c:185 local_bh_enable include/linux/bottom_half.h:32 [inline] ip6t_do_table+0xada/0x1860 net/ipv6/netfilter/ip6_tables.c:383 kobject: 'loop0' (ffff88807089c620): kobject_uevent_env ip6t_mangle_out net/ipv6/netfilter/ip6table_mangle.c:63 [inline] ip6table_mangle_hook+0x2d7/0x6e0 net/ipv6/netfilter/ip6table_mangle.c:85 nf_hook_entry_hookfn include/linux/netfilter.h:108 [inline] nf_hook_slow+0xaf/0x1b0 net/netfilter/core.c:467 kobject: 'loop0' (ffff88807089c620): fill_kobj_path: path = '/devices/virtual/block/loop0' nf_hook include/linux/netfilter.h:205 [inline] NF_HOOK include/linux/netfilter.h:248 [inline] ip6_xmit+0x1055/0x1eb0 net/ipv6/ip6_output.c:275 inet6_csk_xmit+0x286/0x4d0 net/ipv6/inet6_connection_sock.c:139 __tcp_transmit_skb+0x172c/0x2fe0 net/ipv4/tcp_output.c:1130 tcp_transmit_skb net/ipv4/tcp_output.c:1146 [inline] tcp_write_xmit+0x523/0x4960 net/ipv4/tcp_output.c:2382 __tcp_push_pending_frames+0xa6/0x260 net/ipv4/tcp_output.c:2563 tcp_push_pending_frames include/net/tcp.h:1770 [inline] tcp_data_snd_check net/ipv4/tcp_input.c:5119 [inline] tcp_rcv_established+0x628/0x1650 net/ipv4/tcp_input.c:5566 tcp_v6_do_rcv+0x417/0x1190 net/ipv6/tcp_ipv6.c:1301 sk_backlog_rcv include/net/sock.h:912 [inline] __release_sock+0x12d/0x350 net/core/sock.c:2259 release_sock+0x59/0x1b0 net/core/sock.c:2774 tcp_splice_read+0x420/0xa60 net/ipv4/tcp.c:826 sock_splice_read+0xb9/0x100 net/socket.c:883 do_splice_to+0x105/0x170 fs/splice.c:880 do_splice fs/splice.c:1173 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0x1004/0x1430 fs/splice.c:1382 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4598e9 RSP: 002b:00007f0545016c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000004598e9 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 000000000075bf20 R08: 1000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f05450176d4 R13: 00000000004c90ca R14: 00000000004df570 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..