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BUG: KMSAN: uninit-value in __insert_vmap_area+0x1b5/0x750 mm/vmalloc.c:374
CPU: 1 PID: 10517 Comm: syz-executor3 Not tainted 5.0.0-rc1+ #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x173/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:600
 __msan_warning+0x82/0xf0 mm/kmsan/kmsan_instr.c:313
 __insert_vmap_area+0x1b5/0x750 mm/vmalloc.c:374
 alloc_vmap_area+0x11f5/0x15f0 mm/vmalloc.c:508
 __get_vm_area_node+0x3e6/0x7f0 mm/vmalloc.c:1397
 __vmalloc_node_range+0x315/0x13a0 mm/vmalloc.c:1751
 __vmalloc_node mm/vmalloc.c:1801 [inline]
 __vmalloc_node_flags mm/vmalloc.c:1815 [inline]
 vzalloc+0xd8/0xf0 mm/vmalloc.c:1854
 alloc_counters+0x99/0x8d0 net/ipv6/netfilter/ip6_tables.c:819
 copy_entries_to_user net/ipv4/netfilter/arp_tables.c:674 [inline]
 get_entries net/ipv4/netfilter/arp_tables.c:861 [inline]
 do_arpt_get_ctl+0x774/0xd50 net/ipv4/netfilter/arp_tables.c:1482
 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
 nf_getsockopt+0x481/0x4e0 net/netfilter/nf_sockopt.c:122
 ip_getsockopt+0x2b1/0x470 net/ipv4/ip_sockglue.c:1576
 tcp_getsockopt+0x1c6/0x1f0 net/ipv4/tcp.c:3591
 sock_common_getsockopt+0x13f/0x180 net/core/sock.c:2950
 __sys_getsockopt+0x489/0x550 net/socket.c:1939
 __do_sys_getsockopt net/socket.c:1950 [inline]
 __se_sys_getsockopt+0xe1/0x100 net/socket.c:1947
 __x64_sys_getsockopt+0x62/0x80 net/socket.c:1947
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x45a9fa
Code: b8 34 01 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 2d 8c fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 0a 8c fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:0000000000a4f648 EFLAGS: 00000212 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 0000000000a4f750 RCX: 000000000045a9fa
RDX: 0000000000000061 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000a4f65c R09: 000000000000000a
R10: 0000000000a4f750 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000050f5d R14: 0000000000000026 R15: 0000000000000003

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:205 [inline]
 kmsan_internal_poison_shadow+0x92/0x150 mm/kmsan/kmsan.c:159
 kmsan_kmalloc+0xa6/0x130 mm/kmsan/kmsan_hooks.c:176
 kmem_cache_alloc_node_trace+0xb59/0xc70 mm/slub.c:2814
 kmalloc_node include/linux/slab.h:583 [inline]
 alloc_vmap_area+0x210/0x15f0 mm/vmalloc.c:420
 __get_vm_area_node+0x3e6/0x7f0 mm/vmalloc.c:1397
 __vmalloc_node_range+0x315/0x13a0 mm/vmalloc.c:1751
 __vmalloc_node mm/vmalloc.c:1801 [inline]
 __vmalloc_node_flags mm/vmalloc.c:1815 [inline]
 vmalloc+0xd8/0xf0 mm/vmalloc.c:1837
 ebt_register_table+0x2f8/0x1ec0 net/bridge/netfilter/ebtables.c:1208
 broute_net_init+0x6c/0x80 net/bridge/netfilter/ebtable_broute.c:68
 ops_init+0x52c/0x6c0 net/core/net_namespace.c:129
 setup_net+0x290/0xf80 net/core/net_namespace.c:314
 copy_net_ns+0x597/0x890 net/core/net_namespace.c:437
 create_new_namespaces+0x8d9/0xda0 kernel/nsproxy.c:107
 unshare_nsproxy_namespaces+0x25e/0x340 kernel/nsproxy.c:206
 ksys_unshare+0x8d3/0x1160 kernel/fork.c:2542
 __do_sys_unshare kernel/fork.c:2610 [inline]
 __se_sys_unshare+0x41/0x60 kernel/fork.c:2608
 __x64_sys_unshare+0x32/0x50 kernel/fork.c:2608
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
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