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BUG: KMSAN: uninit-value in IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline]
BUG: KMSAN: uninit-value in geneve_rx drivers/net/geneve.c:279 [inline]
BUG: KMSAN: uninit-value in geneve_udp_encap_recv+0x3703/0x3bd0 drivers/net/geneve.c:391
 IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline]
 geneve_rx drivers/net/geneve.c:279 [inline]
 geneve_udp_encap_recv+0x3703/0x3bd0 drivers/net/geneve.c:391
 udp_queue_rcv_one_skb+0x1d23/0x1f10 net/ipv4/udp.c:2169
 udp_queue_rcv_skb+0x873/0x8a0 net/ipv4/udp.c:2246
 udp_unicast_rcv_skb+0x184/0x4b0 net/ipv4/udp.c:2406
 __udp4_lib_rcv+0x1984/0x29b0 net/ipv4/udp.c:2478
 udp_rcv+0x7d/0xa0 net/ipv4/udp.c:2660
 ip_protocol_deliver_rcu+0x264/0x1300 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x2b8/0x440 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:303 [inline]
 ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:468 [inline]
 ip_rcv_finish net/ipv4/ip_input.c:449 [inline]
 NF_HOOK include/linux/netfilter.h:303 [inline]
 ip_rcv+0x476/0x770 net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core net/core/dev.c:5491 [inline]
 __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5605
 process_backlog+0x480/0x8b0 net/core/dev.c:5933
 __napi_poll+0xe4/0x950 net/core/dev.c:6496
 napi_poll net/core/dev.c:6563 [inline]
 net_rx_action+0x884/0x16d0 net/core/dev.c:6696
 __do_softirq+0x1b7/0x78f kernel/softirq.c:571
 do_softirq+0x10d/0x190 kernel/softirq.c:472
 __local_bh_enable_ip+0x99/0xa0 kernel/softirq.c:396
 local_bh_enable+0x28/0x30 include/linux/bottom_half.h:33
 rcu_read_unlock_bh include/linux/rcupdate.h:843 [inline]
 __dev_queue_xmit+0x2616/0x50f0 net/core/dev.c:4271
 dev_queue_xmit include/linux/netdevice.h:3085 [inline]
 packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276
 packet_snd net/packet/af_packet.c:3081 [inline]
 packet_sendmsg+0x8a5d/0x9de0 net/packet/af_packet.c:3113
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg net/socket.c:747 [inline]
 __sys_sendto+0x76c/0xa10 net/socket.c:2144
 __do_sys_sendto net/socket.c:2156 [inline]
 __se_sys_sendto net/socket.c:2152 [inline]
 __x64_sys_sendto+0x125/0x1c0 net/socket.c:2152
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Uninit was created at:
 slab_post_alloc_hook+0x12d/0xb60 mm/slab.h:716
 slab_alloc_node mm/slub.c:3451 [inline]
 kmem_cache_alloc_node+0x535/0xa30 mm/slub.c:3496
 kmalloc_reserve+0x148/0x470 net/core/skbuff.c:568
 __alloc_skb+0x318/0x740 net/core/skbuff.c:654
 alloc_skb include/linux/skbuff.h:1288 [inline]
 alloc_skb_with_frags+0xbd/0xbb0 net/core/skbuff.c:6378
 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2729
 packet_alloc_skb net/packet/af_packet.c:2930 [inline]
 packet_snd net/packet/af_packet.c:3024 [inline]
 packet_sendmsg+0x6fc2/0x9de0 net/packet/af_packet.c:3113
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg net/socket.c:747 [inline]
 __sys_sendto+0x76c/0xa10 net/socket.c:2144
 __do_sys_sendto net/socket.c:2156 [inline]
 __se_sys_sendto net/socket.c:2152 [inline]
 __x64_sys_sendto+0x125/0x1c0 net/socket.c:2152
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

CPU: 0 PID: 6832 Comm: syz-executor.2 Not tainted 6.4.0-rc3-syzkaller-gf93f2feda5d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
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