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BUG: KMSAN: uninit-value in skb_gso_segment include/net/gso.h:83 [inline]
BUG: KMSAN: uninit-value in validate_xmit_skb+0xb10/0x18d0 net/core/dev.c:3866
 skb_gso_segment include/net/gso.h:83 [inline]
 validate_xmit_skb+0xb10/0x18d0 net/core/dev.c:3866
 validate_xmit_skb_list+0xd4/0x320 net/core/dev.c:3916
 sch_direct_xmit+0xd4/0xcf0 net/sched/sch_generic.c:328
 __dev_xmit_skb net/core/dev.c:4018 [inline]
 __dev_queue_xmit+0x35e6/0x5e20 net/core/dev.c:4595
 dev_queue_xmit include/linux/netdevice.h:3350 [inline]
 packet_xmit+0x8f/0x710 net/packet/af_packet.c:276
 packet_snd net/packet/af_packet.c:3131 [inline]
 packet_sendmsg+0x9614/0xa710 net/packet/af_packet.c:3163
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x333/0x3d0 net/socket.c:727
 ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2566
 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2655
 x64_sys_call+0x32fb/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x1b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was stored to memory at:
 validate_xmit_vlan net/core/dev.c:3813 [inline]
 validate_xmit_skb+0xb09/0x18d0 net/core/dev.c:3855
 validate_xmit_skb_list+0xd4/0x320 net/core/dev.c:3916
 sch_direct_xmit+0xd4/0xcf0 net/sched/sch_generic.c:328
 __dev_xmit_skb net/core/dev.c:4018 [inline]
 __dev_queue_xmit+0x35e6/0x5e20 net/core/dev.c:4595
 dev_queue_xmit include/linux/netdevice.h:3350 [inline]
 packet_xmit+0x8f/0x710 net/packet/af_packet.c:276
 packet_snd net/packet/af_packet.c:3131 [inline]
 packet_sendmsg+0x9614/0xa710 net/packet/af_packet.c:3163
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x333/0x3d0 net/socket.c:727
 ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2566
 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2655
 x64_sys_call+0x32fb/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x1b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4153 [inline]
 slab_alloc_node mm/slub.c:4196 [inline]
 kmem_cache_alloc_node_noprof+0x818/0xf00 mm/slub.c:4248
 kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:577
 __alloc_skb+0x347/0x7d0 net/core/skbuff.c:668
 alloc_skb include/linux/skbuff.h:1340 [inline]
 alloc_skb_with_frags+0xc5/0xa60 net/core/skbuff.c:6639
 sock_alloc_send_pskb+0xad8/0xc70 net/core/sock.c:2954
 packet_alloc_skb net/packet/af_packet.c:2981 [inline]
 packet_snd net/packet/af_packet.c:3074 [inline]
 packet_sendmsg+0x77e7/0xa710 net/packet/af_packet.c:3163
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x333/0x3d0 net/socket.c:727
 ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2566
 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2655
 x64_sys_call+0x32fb/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x1b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 5820 Comm: syz-executor233 Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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