protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
------------[ cut here ]------------
WARNING: CPU: 1 PID: 30561 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: 30561 Comm: syz-executor.0 Not tainted 4.14.144 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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:ffff8880aef07c88 EFLAGS: 00010206
RAX: ffff8880a9b54540 RBX: ffff88807301c080 RCX: 0000000000000008
RDX: 0000000000000100 RSI: ffff88809886a8cc RDI: ffff88809886aa98
RBP: ffff8880aef07ce8 R08: 0000009e8e2d87f9 R09: ffff88821fff8048
R10: ffff88821fff8050 R11: 0000000000000001 R12: ffff88809886a0c0
R13: ffff88809886a75a R14: ffff88809886a0f0 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
kobject: 'loop2' (ffff8880a4a7b1e0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a7b1e0): fill_kobj_path: path = '/devices/virtual/block/loop2'
 __do_softirq+0x244/0x9a0 kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x160/0x1b0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:lock_acquire+0x1ea/0x430 kernel/locking/lockdep.c:3994
RSP: 0018:ffff88804fc67088 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0ee2a81 RBX: ffff8880a9b54540 RCX: 00000000991b6321
RDX: dffffc0000000000 RSI: ffff8880a9b54dc0 RDI: 0000000000000286
RBP: ffff88804fc670d0 R08: 0000000000005aab R09: ffffffff88cac9d8
R10: ffff8880a9b54dc0 R11: ffff8880a9b54540 R12: ffffffff877f0ba0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 fs_reclaim_acquire.part.0+0x24/0x30 mm/page_alloc.c:3551
 fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3552
 slab_pre_alloc_hook mm/slab.h:416 [inline]
 slab_alloc_node mm/slab.c:3297 [inline]
 kmem_cache_alloc_node_trace+0x39/0x770 mm/slab.c:3659
 __do_kmalloc_node mm/slab.c:3681 [inline]
 __kmalloc_node_track_caller+0x3d/0x80 mm/slab.c:3696
 __kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137
 __alloc_skb+0xcf/0x500 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:980 [inline]
 alloc_skb_with_frags+0x86/0x4b0 net/core/skbuff.c:5209
 sock_alloc_send_pskb+0x5db/0x740 net/core/sock.c:2073
 sock_alloc_send_skb+0x32/0x40 net/core/sock.c:2090
 __ip6_append_data.isra.0+0x17b6/0x2ac0 net/ipv6/ip6_output.c:1419
 ip6_make_skb+0x240/0x410 net/ipv6/ip6_output.c:1768
 udpv6_sendmsg+0x1dff/0x2560 net/ipv6/udp.c:1347
 inet_sendmsg+0x122/0x500 net/ipv4/af_inet.c:762
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xce/0x110 net/socket.c:656
 ___sys_sendmsg+0x349/0x840 net/socket.c:2062
 __sys_sendmmsg+0x152/0x3a0 net/socket.c:2152
 SYSC_sendmmsg net/socket.c:2183 [inline]
 SyS_sendmmsg+0x35/0x60 net/socket.c:2178
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4598e9
RSP: 002b:00007f3e4ec37c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000004598e9
RDX: 00000000000004ff RSI: 00000000200092c0 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3e4ec386d4
R13: 00000000004c70a7 R14: 00000000004dc768 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..