===================================================== BUG: KMSAN: uninit-value in fib6_node_lookup_1+0x1fc/0xb30 net/ipv6/ip6_fib.c:1568 fib6_node_lookup_1+0x1fc/0xb30 net/ipv6/ip6_fib.c:1568 fib6_node_lookup+0xfb/0x1f0 net/ipv6/ip6_fib.c:1638 fib6_table_lookup+0x71/0x1120 net/ipv6/route.c:2177 ip6_pol_route+0x15b/0x1e60 net/ipv6/route.c:2217 ip6_pol_route_output+0x69/0x80 net/ipv6/route.c:2592 pol_lookup_func include/net/ip6_fib.h:576 [inline] fib6_rule_lookup+0x240/0x7a0 net/ipv6/fib6_rules.c:116 ip6_route_output_flags_noref net/ipv6/route.c:2625 [inline] ip6_route_output_flags+0x488/0x730 net/ipv6/route.c:2637 ip6_route_output include/net/ip6_route.h:94 [inline] xfrmi_xmit+0x307/0x2270 net/xfrm/xfrm_interface_core.c:498 __netdev_start_xmit include/linux/netdevice.h:4915 [inline] netdev_start_xmit include/linux/netdevice.h:4929 [inline] xmit_one net/core/dev.c:3578 [inline] dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3594 __dev_queue_xmit+0x34eb/0x50f0 net/core/dev.c:4244 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_sendmsg+0x999/0xd50 net/socket.c:2503 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2557 __sys_sendmsg net/socket.c:2586 [inline] __do_sys_sendmsg net/socket.c:2595 [inline] __se_sys_sendmsg net/socket.c:2593 [inline] __x64_sys_sendmsg+0x304/0x490 net/socket.c:2593 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 stored to memory at: decode_session6 net/xfrm/xfrm_policy.c:3460 [inline] __xfrm_decode_session+0x54a/0x2890 net/xfrm/xfrm_policy.c:3557 xfrm_decode_session include/net/xfrm.h:1215 [inline] xfrmi_xmit+0x158/0x2270 net/xfrm/xfrm_interface_core.c:493 __netdev_start_xmit include/linux/netdevice.h:4915 [inline] netdev_start_xmit include/linux/netdevice.h:4929 [inline] xmit_one net/core/dev.c:3578 [inline] dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3594 __dev_queue_xmit+0x34eb/0x50f0 net/core/dev.c:4244 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_sendmsg+0x999/0xd50 net/socket.c:2503 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2557 __sys_sendmsg net/socket.c:2586 [inline] __do_sys_sendmsg net/socket.c:2595 [inline] __se_sys_sendmsg net/socket.c:2593 [inline] __x64_sys_sendmsg+0x304/0x490 net/socket.c:2593 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_sendmsg+0x999/0xd50 net/socket.c:2503 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2557 __sys_sendmsg net/socket.c:2586 [inline] __do_sys_sendmsg net/socket.c:2595 [inline] __se_sys_sendmsg net/socket.c:2593 [inline] __x64_sys_sendmsg+0x304/0x490 net/socket.c:2593 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: 10604 Comm: syz-executor.5 Not tainted 6.4.0-rc3-syzkaller-gf93f2feda5d6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023 =====================================================