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BUG: KMSAN: uninit-value in decode_session4 net/xfrm/xfrm_policy.c:3391 [inline]
BUG: KMSAN: uninit-value in __xfrm_decode_session+0x16ba/0x2890 net/xfrm/xfrm_policy.c:3562
 decode_session4 net/xfrm/xfrm_policy.c:3391 [inline]
 __xfrm_decode_session+0x16ba/0x2890 net/xfrm/xfrm_policy.c:3562
 xfrm_decode_session include/net/xfrm.h:1216 [inline]
 xfrmi_xmit+0x1da/0x2270 net/xfrm/xfrm_interface_core.c:555
 __netdev_start_xmit include/linux/netdevice.h:4910 [inline]
 netdev_start_xmit include/linux/netdevice.h:4924 [inline]
 xmit_one net/core/dev.c:3537 [inline]
 dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3553
 __dev_queue_xmit+0x34eb/0x50f0 net/core/dev.c:4203
 dev_queue_xmit include/linux/netdevice.h:3088 [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:725 [inline]
 sock_sendmsg net/socket.c:748 [inline]
 ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2494
 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2548
 __sys_sendmsg net/socket.c:2577 [inline]
 __do_sys_sendmsg net/socket.c:2586 [inline]
 __se_sys_sendmsg net/socket.c:2584 [inline]
 __x64_sys_sendmsg+0x307/0x490 net/socket.c:2584
 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+0x12f/0xb70 mm/slab.h:767
 slab_alloc_node mm/slub.c:3470 [inline]
 kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3515
 kmalloc_reserve+0x148/0x470 net/core/skbuff.c:559
 __alloc_skb+0x318/0x740 net/core/skbuff.c:644
 alloc_skb include/linux/skbuff.h:1289 [inline]
 alloc_skb_with_frags+0xbd/0xbb0 net/core/skbuff.c:6233
 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2782
 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:725 [inline]
 sock_sendmsg net/socket.c:748 [inline]
 ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2494
 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2548
 __sys_sendmsg net/socket.c:2577 [inline]
 __do_sys_sendmsg net/socket.c:2586 [inline]
 __se_sys_sendmsg net/socket.c:2584 [inline]
 __x64_sys_sendmsg+0x307/0x490 net/socket.c:2584
 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: 1 PID: 6058 Comm: syz-executor.3 Not tainted 6.5.0-rc3-syzkaller-00018-g0b5547c51827 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
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