kvm: emulating exchange as write
libceph: mon1 [::1]:6789 socket error on write
libceph: mon1 [::1]:6789 socket error on write
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7073 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: 7073 Comm: kworker/1:3 Not tainted 4.14.144 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ceph-msgr ceph_con_workfn
Call Trace:
 <IRQ>
 __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: ffff888071d56640 RBX: ffff888073474140 RCX: 0000000000000004
RDX: 0000000000000100 RSI: ffff88806fdc68cc RDI: ffff88806fdc6a98
RBP: ffff8880aef07d38 R08: 0000001bd77b734d R09: ffff88821fff8048
R10: ffff88821fff8050 R11: 0000000000000001 R12: ffff88806fdc60c0
R13: ffff88806fdc675a R14: ffff88806fdc60f0 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
 </IRQ>
 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
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0x31/0x40 kernel/locking/spinlock.c:208
 spin_unlock_bh include/linux/spinlock.h:362 [inline]
 release_sock+0x14a/0x1b0 net/core/sock.c:2785
 tcp_recvmsg+0x670/0x1cd0 net/ipv4/tcp.c:2011
 inet_recvmsg+0xfb/0x500 net/ipv4/af_inet.c:793
 sock_recvmsg_nosec net/socket.c:819 [inline]
 sock_recvmsg net/socket.c:826 [inline]
 sock_recvmsg+0xc6/0x110 net/socket.c:822
 ceph_tcp_recvmsg+0xcc/0x110 net/ceph/messenger.c:531
 read_partial.isra.0+0xe3/0x140 net/ceph/messenger.c:1698
 read_partial_banner net/ceph/messenger.c:1721 [inline]
 try_read net/ceph/messenger.c:2678 [inline]
 ceph_con_workfn+0x313a/0x83f0 net/ceph/messenger.c:2949
 process_one_work+0x863/0x1600 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x319/0x430 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Kernel Offset: disabled
Rebooting in 86400 seconds..