=====================================================
BUG: KMSAN: uninit-value in __INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline]
BUG: KMSAN: uninit-value in INET_ECN_decapsulate+0x271/0x1c90 include/net/inet_ecn.h:275
 __INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline]
 INET_ECN_decapsulate+0x271/0x1c90 include/net/inet_ecn.h:275
 geneve_rx+0x2100/0x29b0
 geneve_udp_encap_recv+0x1319/0x13b0 drivers/net/geneve.c:378
 udp_queue_rcv_one_skb+0x1c0c/0x1de0 net/ipv4/udp.c:2156
 udp_queue_rcv_skb+0x301/0xa60 net/ipv4/udp.c:2230
 udp_unicast_rcv_skb+0x465/0x5a0 net/ipv4/udp.c:2390
 __udp4_lib_rcv+0x2375/0x2ec0 net/ipv4/udp.c:2462
 udp_rcv+0x5c/0x70 net/ipv4/udp.c:2636
 ip_protocol_deliver_rcu+0x770/0x1100 net/ipv4/ip_input.c:204
 ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x584/0x8c0 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:461 [inline]
 ip_rcv_finish net/ipv4/ip_input.c:429 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x5b7/0x830 net/ipv4/ip_input.c:540
 __netif_receive_skb_one_core net/core/dev.c:5351 [inline]
 __netif_receive_skb+0x1ec/0x630 net/core/dev.c:5465
 process_backlog+0x54b/0xc10 net/core/dev.c:5797
 __napi_poll+0x14c/0xc00 net/core/dev.c:6365
 napi_poll net/core/dev.c:6432 [inline]
 net_rx_action+0x7e2/0x1820 net/core/dev.c:6519
 __do_softirq+0x1ee/0x7c5 kernel/softirq.c:558
 do_softirq+0x16d/0x220 kernel/softirq.c:459
 __local_bh_enable_ip+0xd5/0xe0 kernel/softirq.c:383
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:33
 rcu_read_unlock_bh include/linux/rcupdate.h:764 [inline]
 __dev_queue_xmit+0x2483/0x3310 net/core/dev.c:4143
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4149
 packet_snd net/packet/af_packet.c:3057 [inline]
 packet_sendmsg+0x8758/0x9cb0 net/packet/af_packet.c:3084
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 __sys_sendto+0x9ef/0xc70 net/socket.c:2040
 __do_sys_sendto net/socket.c:2052 [inline]
 __se_sys_sendto net/socket.c:2048 [inline]
 __x64_sys_sendto+0x19c/0x210 net/socket.c:2048
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:737 [inline]
 slab_alloc_node mm/slub.c:3247 [inline]
 __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4975
 kmalloc_reserve net/core/skbuff.c:354 [inline]
 __alloc_skb+0x545/0xf90 net/core/skbuff.c:426
 alloc_skb include/linux/skbuff.h:1158 [inline]
 alloc_skb_with_frags+0x1db/0xbc0 net/core/skbuff.c:5956
 sock_alloc_send_pskb+0xdf4/0xfc0 net/core/sock.c:2586
 packet_alloc_skb net/packet/af_packet.c:2905 [inline]
 packet_snd net/packet/af_packet.c:3000 [inline]
 packet_sendmsg+0x6914/0x9cb0 net/packet/af_packet.c:3084
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 __sys_sendto+0x9ef/0xc70 net/socket.c:2040
 __do_sys_sendto net/socket.c:2052 [inline]
 __se_sys_sendto net/socket.c:2048 [inline]
 __x64_sys_sendto+0x19c/0x210 net/socket.c:2048
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

CPU: 1 PID: 24052 Comm: syz-executor.3 Not tainted 5.17.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================