===================================================== BUG: KMSAN: uninit-value in validate_set+0x196/0x15d0 net/openvswitch/flow_netlink.c:2868 validate_set+0x196/0x15d0 net/openvswitch/flow_netlink.c:2868 __ovs_nla_copy_actions+0x2bf9/0x6830 net/openvswitch/flow_netlink.c:3332 ovs_nla_copy_actions+0x342/0x530 net/openvswitch/flow_netlink.c:3487 ovs_flow_cmd_new+0x956/0x18b0 net/openvswitch/datapath.c:1025 genl_family_rcv_msg_doit net/netlink/genetlink.c:968 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1048 [inline] genl_rcv_msg+0x12ed/0x1380 net/netlink/genetlink.c:1065 netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2546 genl_rcv+0x40/0x60 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0xf28/0x1230 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x122f/0x13d0 net/netlink/af_netlink.c:1913 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] netlink_alloc_large_skb net/netlink/af_netlink.c:1211 [inline] netlink_sendmsg+0xb34/0x13d0 net/netlink/af_netlink.c:1888 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: 1 PID: 32223 Comm: syz-executor.1 Tainted: G W 6.4.0-rc4-syzkaller-g2741f1b02117 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 =====================================================