===================================================== BUG: KMSAN: uninit-value in skb_gso_segment include/linux/netdevice.h:4859 [inline] BUG: KMSAN: uninit-value in validate_xmit_skb+0x1177/0x1b50 net/core/dev.c:3659 skb_gso_segment include/linux/netdevice.h:4859 [inline] validate_xmit_skb+0x1177/0x1b50 net/core/dev.c:3659 __dev_queue_xmit+0x1f0c/0x50f0 net/core/dev.c:4236 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: 1 PID: 27841 Comm: syz-executor.2 Tainted: G W 6.4.0-rc2-syzkaller-gdad188c049f8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 =====================================================