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BUG: KMSAN: uninit-value in slab_alloc_node mm/slub.c:2703 [inline]
BUG: KMSAN: uninit-value in __kmalloc_node_track_caller+0x667/0x1160 mm/slub.c:4351
CPU: 0 PID: 2165 Comm: udevd Not tainted 4.19.0-rc3+ #48
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+0x14b/0x190 lib/dump_stack.c:113
 kmsan_report+0x183/0x2b0 mm/kmsan/kmsan.c:956
 __msan_warning+0x70/0xc0 mm/kmsan/kmsan_instr.c:645
 slab_alloc_node mm/slub.c:2703 [inline]
 __kmalloc_node_track_caller+0x667/0x1160 mm/slub.c:4351
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x2f5/0x9e0 net/core/skbuff.c:206
 alloc_skb include/linux/skbuff.h:996 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1189 [inline]
 netlink_sendmsg+0xb49/0x1290 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg net/socket.c:631 [inline]
 ___sys_sendmsg+0xe70/0x1290 net/socket.c:2114
 __sys_sendmsg net/socket.c:2152 [inline]
 __do_sys_sendmsg net/socket.c:2161 [inline]
 __se_sys_sendmsg+0x2a3/0x3d0 net/socket.c:2159
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2159
 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x7f20fe73f320
Code: 02 48 83 c8 ff eb 8d 48 8b 05 14 7b 2a 00 f7 da 64 89 10 48 83 c8 ff eb c9 90 83 3d d5 d2 2a 00 00 75 10 b8 2e 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e ba 00 00 48 89 04 24
RSP: 002b:00007fff23da4af8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f20fe73f320
RDX: 0000000000000000 RSI: 00007fff23da4b40 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f20fe787c20
R10: 736563697665642f R11: 0000000000000246 R12: 0000000001b452d0
R13: 00000000000000ad R14: 0000000001b57650 R15: 0000000001b45250

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:256 [inline]
 kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:181
 kmsan_kmalloc+0x98/0x100 mm/kmsan/kmsan_hooks.c:91
 kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan_hooks.c:100
 slab_post_alloc_hook mm/slab.h:446 [inline]
 slab_alloc_node mm/slub.c:2718 [inline]
 __kmalloc_node_track_caller+0x9e7/0x1160 mm/slub.c:4351
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x2f5/0x9e0 net/core/skbuff.c:206
 alloc_skb include/linux/skbuff.h:996 [inline]
 __tcp_send_ack+0x10d/0x880 net/ipv4/tcp_output.c:3584
 tcp_send_ack+0x68/0x90 net/ipv4/tcp_output.c:3611
 __tcp_ack_snd_check+0x786/0x8e0 net/ipv4/tcp_input.c:5186
 tcp_ack_snd_check net/ipv4/tcp_input.c:5222 [inline]
 tcp_rcv_established+0x1b4e/0x2860 net/ipv4/tcp_input.c:5643
 tcp_v4_do_rcv+0x689/0xd50 net/ipv4/tcp_ipv4.c:1532
 tcp_v4_rcv+0x6b60/0x70a0 net/ipv4/tcp_ipv4.c:1824
 ip_local_deliver_finish+0x7ee/0xea0 net/ipv4/ip_input.c:215
 NF_HOOK include/linux/netfilter.h:287 [inline]
 ip_local_deliver+0x438/0x4d0 net/ipv4/ip_input.c:256
 dst_input include/net/dst.h:450 [inline]
 ip_rcv_finish net/ipv4/ip_input.c:415 [inline]
 NF_HOOK include/linux/netfilter.h:287 [inline]
 ip_rcv+0x65f/0x6d0 net/ipv4/ip_input.c:524
 __netif_receive_skb_one_core net/core/dev.c:4891 [inline]
 __netif_receive_skb net/core/dev.c:5001 [inline]
 netif_receive_skb_internal+0x5bd/0x970 net/core/dev.c:5104
 napi_skb_finish net/core/dev.c:5563 [inline]
 napi_gro_receive+0x668/0xb10 net/core/dev.c:5594
 receive_buf+0x573c/0x7c70 drivers/net/virtio_net.c:1036
 virtnet_receive drivers/net/virtio_net.c:1298 [inline]
 virtnet_poll+0xcca/0x1a20 drivers/net/virtio_net.c:1385
 napi_poll net/core/dev.c:6227 [inline]
 net_rx_action+0x723/0x19d0 net/core/dev.c:6293
 __do_softirq+0x562/0x948 kernel/softirq.c:292
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