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BUG: KMSAN: uninit-value in ip_options_fragment+0x326/0x430 net/ipv4/ip_options.c:203
 ip_options_fragment+0x326/0x430 net/ipv4/ip_options.c:203
 ip_do_fragment+0x2081/0x2960 net/ipv4/ip_output.c:851
 ip_fragment+0x20e/0x300
 __ip_finish_output+0x4d7/0x720 net/ipv4/ip_output.c:304
 ip_finish_output+0x3d1/0x400 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x258/0x510 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:451 [inline]
 ip_local_out+0xe5/0x140 net/ipv4/ip_output.c:126
 ipvlan_process_v4_outbound drivers/net/ipvlan/ipvlan_core.c:439 [inline]
 ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:524 [inline]
 ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:586 [inline]
 ipvlan_queue_xmit+0x1edf/0x2560 drivers/net/ipvlan/ipvlan_core.c:649
 ipvlan_start_xmit+0x57/0x260 drivers/net/ipvlan/ipvlan_main.c:220
 __netdev_start_xmit include/linux/netdevice.h:4819 [inline]
 netdev_start_xmit include/linux/netdevice.h:4833 [inline]
 xmit_one+0x14e/0x5f0 net/core/dev.c:3590
 dev_hard_start_xmit+0xe5/0x370 net/core/dev.c:3606
 sch_direct_xmit+0x3f1/0xdb0 net/sched/sch_generic.c:342
 qdisc_restart net/sched/sch_generic.c:407 [inline]
 __qdisc_run+0x2df/0x4e0 net/sched/sch_generic.c:415
 __dev_xmit_skb+0x73b/0x1a30 net/core/dev.c:3880
 __dev_queue_xmit+0x12cb/0x31f0 net/core/dev.c:4222
 dev_queue_xmit+0x2b/0x30 include/linux/netdevice.h:3008
 packet_snd net/packet/af_packet.c:3073 [inline]
 packet_sendmsg+0x605b/0x78e0 net/packet/af_packet.c:3104
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 __sys_sendto+0x7f2/0xa60 net/socket.c:2117
 __do_sys_sendto net/socket.c:2129 [inline]
 __se_sys_sendto net/socket.c:2125 [inline]
 __x64_sys_sendto+0x121/0x1c0 net/socket.c:2125
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:732 [inline]
 slab_alloc_node mm/slub.c:3258 [inline]
 __kmalloc_node_track_caller+0x814/0x1250 mm/slub.c:4970
 kmalloc_reserve net/core/skbuff.c:362 [inline]
 __alloc_skb+0x346/0xcf0 net/core/skbuff.c:434
 skb_segment+0x2160/0x7670 net/core/skbuff.c:4171
 udp4_ufo_fragment+0x676/0x970 net/ipv4/udp_offload.c:423
 inet_gso_segment+0xa94/0x1b70 net/ipv4/af_inet.c:1380
 skb_mac_gso_segment+0x3f4/0x640 net/core/gro.c:141
 __skb_gso_segment+0x56b/0x760 net/core/dev.c:3413
 skb_gso_segment include/linux/netdevice.h:4763 [inline]
 validate_xmit_skb+0x9af/0x1d50 net/core/dev.c:3671
 validate_xmit_skb_list+0xf0/0x2f0 net/core/dev.c:3721
 sch_direct_xmit+0xd9/0xdb0 net/sched/sch_generic.c:327
 qdisc_restart net/sched/sch_generic.c:407 [inline]
 __qdisc_run+0x2df/0x4e0 net/sched/sch_generic.c:415
 __dev_xmit_skb+0x73b/0x1a30 net/core/dev.c:3880
 __dev_queue_xmit+0x12cb/0x31f0 net/core/dev.c:4222
 dev_queue_xmit+0x2b/0x30 include/linux/netdevice.h:3008
 packet_snd net/packet/af_packet.c:3073 [inline]
 packet_sendmsg+0x605b/0x78e0 net/packet/af_packet.c:3104
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 __sys_sendto+0x7f2/0xa60 net/socket.c:2117
 __do_sys_sendto net/socket.c:2129 [inline]
 __se_sys_sendto net/socket.c:2125 [inline]
 __x64_sys_sendto+0x121/0x1c0 net/socket.c:2125
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

CPU: 1 PID: 16129 Comm: syz-executor.3 Not tainted 6.0.0-rc5-syzkaller-48543-g968c2729e576 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
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