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BUG: KMSAN: uninit-value in do_error_trap+0x39b/0x600 arch/x86/kernel/traps.c:297
CPU: 1 PID: 8647 Comm: blkid Not tainted 4.16.0+ #87
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+0x185/0x1d0 lib/dump_stack.c:53
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683
 do_error_trap+0x39b/0x600 arch/x86/kernel/traps.c:297
 do_invalid_op+0x46/0x50 arch/x86/kernel/traps.c:316
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986
RIP: 0010:skb_copy_and_csum_bits+0x10f7/0x1110 net/core/skbuff.c:2630
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
RSP: 0000:ffff88021fd0eb20 EFLAGS: 00010206
RAX: ffffffff87b72c79 RBX: 0000000000000000 RCX: ffff880152cf5880
RDX: 0000000000000300 RSI: 0000000000000000 RDI: 000000000000003c
RBP: ffff88021fd0ec40 R08: 0000000000000000 R09: ffff8801c8144000
R10: 0000000000000000 R11: ffff8801458f0000 R12: 00000000000001e8
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 icmp_glue_bits+0x164/0x370 net/ipv4/icmp.c:357
 __ip_append_data+0x3745/0x3d30 net/ipv4/ip_output.c:1018
 ip_append_data+0x2fb/0x440 net/ipv4/ip_output.c:1170
 icmp_push_reply+0x23f/0x830 net/ipv4/icmp.c:375
 icmp_send+0x2431/0x2db0 net/ipv4/icmp.c:741
 ip_fragment+0x38f/0x3f0 net/ipv4/ip_output.c:552
 ip_finish_output+0xd1b/0xff0 net/ipv4/ip_output.c:315
 NF_HOOK_COND include/linux/netfilter.h:277 [inline]
 ip_output+0x505/0x5d0 net/ipv4/ip_output.c:405
 dst_output include/net/dst.h:443 [inline]
 ip_local_out net/ipv4/ip_output.c:124 [inline]
 ip_queue_xmit+0x1a1e/0x1d10 net/ipv4/ip_output.c:504
 tcp_transmit_skb+0x3d81/0x53d0 net/ipv4/tcp_output.c:1176
 __tcp_retransmit_skb+0x33e3/0x4530 net/ipv4/tcp_output.c:2931
 tcp_retransmit_skb+0xa6/0x480 net/ipv4/tcp_output.c:2950
 tcp_retransmit_timer+0x21df/0x4260 net/ipv4/tcp_timer.c:488
 tcp_write_timer_handler+0x38f/0xed0 net/ipv4/tcp_timer.c:573
 tcp_write_timer+0x13d/0x290 net/ipv4/tcp_timer.c:593
 call_timer_fn+0x26a/0x5a0 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0xda7/0x11c0 kernel/time/timer.c:1666
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
 __do_softirq+0x56d/0x93d kernel/softirq.c:285
 invoke_softirq kernel/softirq.c:365 [inline]
 irq_exit+0x202/0x240 kernel/softirq.c:405
 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:541
 smp_apic_timer_interrupt+0x64/0x90 arch/x86/kernel/apic/apic.c:1055
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857
 </IRQ>
RIP: 0010:__nr_to_section include/linux/mmzone.h:1162 [inline]
RIP: 0010:pfn_valid include/linux/mmzone.h:1243 [inline]
RIP: 0010:my_virt_addr_valid mm/kmsan/kmsan_instr.c:129 [inline]
RIP: 0010:msan_get_shadow_origin_ptr+0xf1/0x230 mm/kmsan/kmsan_instr.c:256
RSP: 0000:ffff8801458ff910 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff12
RAX: 000000000aa8ca58 RBX: ffffffff8b311000 RCX: ffff88021fff1000
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000000
RBP: ffff8801458ff940 R08: 0000000001080020 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8b310000 R15: ffffffff8aa8ca58
 __msan_metadata_ptr_for_load_4+0x10/0x20 mm/kmsan/kmsan_instr.c:320
 mem_cgroup_disabled include/linux/memcontrol.h:281 [inline]
 lock_page_memcg+0x3e/0x300 mm/memcontrol.c:1609
 page_add_file_rmap+0xb8/0x6b0 mm/rmap.c:1182
 alloc_set_pte+0x8c6/0x1d80 mm/memory.c:3463
 filemap_map_pages+0x12d7/0x1ac0 mm/filemap.c:2680
 do_fault_around mm/memory.c:3609 [inline]
 do_read_fault mm/memory.c:3643 [inline]
 do_fault mm/memory.c:3748 [inline]
 handle_pte_fault mm/memory.c:3979 [inline]
 __handle_mm_fault mm/memory.c:4103 [inline]
 handle_mm_fault+0x44ba/0x7e50 mm/memory.c:4140
 __do_page_fault+0xec4/0x1a10 arch/x86/mm/fault.c:1423
 do_page_fault+0xd3/0x260 arch/x86/mm/fault.c:1500
 page_fault+0x45/0x50 arch/x86/entry/entry_64.S:1151
RIP: 0033:0x7fd50ad5b330
RSP: 002b:00007ffc348628d8 EFLAGS: 00010206
RAX: 00007fd50b09dfc0 RBX: 00007ffc348629d0 RCX: 0000000000000000
RDX: 00007ffc34862a50 RSI: 00007fd50b0c200b RDI: 00007ffc348628e0
RBP: 00007ffc34862b60 R08: 0000000000000000 R09: 00007ffc34862a50
R10: 0000000000000000 R11: 00007fd50ae08ea0 R12: 0000000000000001
R13: 00007ffc34862a50 R14: 0000000000000fff R15: 00007fd50b0c200b

Local variable description: ----iph@ip_vs_out
Variable was created at:
 ip_vs_out+0x1c8/0x3d40 net/netfilter/ipvs/ip_vs_core.c:1311
 ip_vs_local_reply4+0xec/0x130 net/netfilter/ipvs/ip_vs_core.c:1475
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