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BUG: KMSAN: uninit-value in ipt_mangle_out net/ipv4/netfilter/iptable_mangle.c:58 [inline]
BUG: KMSAN: uninit-value in iptable_mangle_hook+0x731/0x890 net/ipv4/netfilter/iptable_mangle.c:78
 ipt_mangle_out net/ipv4/netfilter/iptable_mangle.c:58 [inline]
 iptable_mangle_hook+0x731/0x890 net/ipv4/netfilter/iptable_mangle.c:78
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_slow+0x188/0x480 net/netfilter/core.c:614
 nf_hook include/linux/netfilter.h:257 [inline]
 __ip_local_out+0x796/0x850 net/ipv4/ip_output.c:115
 ip_local_out+0xa7/0x1f0 net/ipv4/ip_output.c:124
 iptunnel_xmit+0xb04/0x1100 net/ipv4/ip_tunnel_core.c:82
 udp_tunnel_xmit_skb+0x55b/0x700 net/ipv4/udp_tunnel_core.c:172
 geneve_xmit_skb drivers/net/geneve.c:996 [inline]
 geneve_xmit+0x5ed8/0x6fb0 drivers/net/geneve.c:1108
 __netdev_start_xmit include/linux/netdevice.h:4865 [inline]
 netdev_start_xmit include/linux/netdevice.h:4879 [inline]
 xmit_one net/core/dev.c:3583 [inline]
 dev_hard_start_xmit+0x321/0xb50 net/core/dev.c:3599
 __dev_queue_xmit+0x4348/0x6290 net/core/dev.c:4249
 dev_queue_xmit+0x4f/0x60 include/linux/netdevice.h:3035
 packet_snd net/packet/af_packet.c:3073 [inline]
 packet_sendmsg+0x8b92/0xa180 net/packet/af_packet.c:3104
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 __sys_sendto+0xa10/0xc90 net/socket.c:2117
 __do_sys_sendto net/socket.c:2129 [inline]
 __se_sys_sendto net/socket.c:2125 [inline]
 __ia32_sys_sendto+0x1a8/0x220 net/socket.c:2125
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Uninit was stored to memory at:
 iptunnel_xmit+0xd7d/0x1100 net/ipv4/ip_tunnel_core.c:76
 udp_tunnel_xmit_skb+0x55b/0x700 net/ipv4/udp_tunnel_core.c:172
 geneve_xmit_skb drivers/net/geneve.c:996 [inline]
 geneve_xmit+0x5ed8/0x6fb0 drivers/net/geneve.c:1108
 __netdev_start_xmit include/linux/netdevice.h:4865 [inline]
 netdev_start_xmit include/linux/netdevice.h:4879 [inline]
 xmit_one net/core/dev.c:3583 [inline]
 dev_hard_start_xmit+0x321/0xb50 net/core/dev.c:3599
 __dev_queue_xmit+0x4348/0x6290 net/core/dev.c:4249
 dev_queue_xmit+0x4f/0x60 include/linux/netdevice.h:3035
 packet_snd net/packet/af_packet.c:3073 [inline]
 packet_sendmsg+0x8b92/0xa180 net/packet/af_packet.c:3104
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 __sys_sendto+0xa10/0xc90 net/socket.c:2117
 __do_sys_sendto net/socket.c:2129 [inline]
 __se_sys_sendto net/socket.c:2125 [inline]
 __ia32_sys_sendto+0x1a8/0x220 net/socket.c:2125
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Uninit was created at:
 slab_post_alloc_hook+0x271/0xf70 mm/slab.h:766
 slab_alloc_node mm/slub.c:3452 [inline]
 __kmem_cache_alloc_node+0x68c/0xac0 mm/slub.c:3491
 __do_kmalloc_node mm/slab_common.c:967 [inline]
 __kmalloc_node_track_caller+0x3df/0x710 mm/slab_common.c:988
 kmalloc_reserve net/core/skbuff.c:492 [inline]
 __alloc_skb+0x56e/0xad0 net/core/skbuff.c:565
 alloc_skb include/linux/skbuff.h:1270 [inline]
 alloc_skb_with_frags+0x1c8/0xcf0 net/core/skbuff.c:6194
 sock_alloc_send_pskb+0xde6/0xfc0 net/core/sock.c:2741
 packet_alloc_skb net/packet/af_packet.c:2921 [inline]
 packet_snd net/packet/af_packet.c:3016 [inline]
 packet_sendmsg+0x6bda/0xa180 net/packet/af_packet.c:3104
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 __sys_sendto+0xa10/0xc90 net/socket.c:2117
 __do_sys_sendto net/socket.c:2129 [inline]
 __se_sys_sendto net/socket.c:2125 [inline]
 __ia32_sys_sendto+0x1a8/0x220 net/socket.c:2125
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

CPU: 1 PID: 11982 Comm: syz-executor.5 Not tainted 6.2.0-rc7-syzkaller-80760-g8c89ecf5c13b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
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