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BUG: KMSAN: uninit-value in ip_route_output_key_hash_rcu+0x3b7/0x3810 net/ipv4/route.c:2688
 ip_route_output_key_hash_rcu+0x3b7/0x3810 net/ipv4/route.c:2688
 ip_route_output_key_hash net/ipv4/route.c:2671 [inline]
 __ip_route_output_key include/net/route.h:169 [inline]
 ip_route_output_flow+0xca/0x2b0 net/ipv4/route.c:2899
 ipvlan_process_v4_outbound+0x2a8/0x770 drivers/net/ipvlan/ipvlan_core.c:433
 ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:543 [inline]
 ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:605 [inline]
 ipvlan_queue_xmit+0xf21/0x1780 drivers/net/ipvlan/ipvlan_core.c:671
 ipvlan_start_xmit+0x5b/0x210 drivers/net/ipvlan/ipvlan_main.c:223
 __netdev_start_xmit include/linux/netdevice.h:5144 [inline]
 netdev_start_xmit include/linux/netdevice.h:5153 [inline]
 xmit_one net/core/dev.c:3735 [inline]
 dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3751
 sch_direct_xmit+0x399/0xd40 net/sched/sch_generic.c:343
 qdisc_restart net/sched/sch_generic.c:408 [inline]
 __qdisc_run+0x14da/0x35d0 net/sched/sch_generic.c:416
 qdisc_run+0x141/0x4d0 include/net/pkt_sched.h:127
 net_tx_action+0x78b/0x940 net/core/dev.c:5484
 handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:561
 __do_softirq+0x14/0x1a kernel/softirq.c:595
 do_softirq+0x9a/0x100 kernel/softirq.c:462
 __local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:389
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline]
 __dev_queue_xmit+0x2758/0x57d0 net/core/dev.c:4611
 dev_queue_xmit include/linux/netdevice.h:3305 [inline]
 packet_xmit+0x9c/0x6c0 net/packet/af_packet.c:276
 packet_snd net/packet/af_packet.c:3132 [inline]
 packet_sendmsg+0x93e0/0xa7e0 net/packet/af_packet.c:3164
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x30f/0x380 net/socket.c:733
 __sys_sendto+0x594/0x750 net/socket.c:2187
 __do_sys_sendto net/socket.c:2194 [inline]
 __se_sys_sendto net/socket.c:2190 [inline]
 __x64_sys_sendto+0x125/0x1d0 net/socket.c:2190
 x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was stored to memory at:
 ipvlan_process_v4_outbound+0x374/0x770 drivers/net/ipvlan/ipvlan_core.c:424
 ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:543 [inline]
 ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:605 [inline]
 ipvlan_queue_xmit+0xf21/0x1780 drivers/net/ipvlan/ipvlan_core.c:671
 ipvlan_start_xmit+0x5b/0x210 drivers/net/ipvlan/ipvlan_main.c:223
 __netdev_start_xmit include/linux/netdevice.h:5144 [inline]
 netdev_start_xmit include/linux/netdevice.h:5153 [inline]
 xmit_one net/core/dev.c:3735 [inline]
 dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3751
 sch_direct_xmit+0x399/0xd40 net/sched/sch_generic.c:343
 qdisc_restart net/sched/sch_generic.c:408 [inline]
 __qdisc_run+0x14da/0x35d0 net/sched/sch_generic.c:416
 qdisc_run+0x141/0x4d0 include/net/pkt_sched.h:127
 net_tx_action+0x78b/0x940 net/core/dev.c:5484
 handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:561
 __do_softirq+0x14/0x1a kernel/softirq.c:595

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4121 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_node_noprof+0x907/0xe00 mm/slub.c:4216
 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587
 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678
 alloc_skb include/linux/skbuff.h:1331 [inline]
 alloc_skb_with_frags+0xc8/0xd00 net/core/skbuff.c:6612
 sock_alloc_send_pskb+0xa81/0xbf0 net/core/sock.c:2897
 packet_alloc_skb net/packet/af_packet.c:2981 [inline]
 packet_snd net/packet/af_packet.c:3075 [inline]
 packet_sendmsg+0x7722/0xa7e0 net/packet/af_packet.c:3164
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x30f/0x380 net/socket.c:733
 __sys_sendto+0x594/0x750 net/socket.c:2187
 __do_sys_sendto net/socket.c:2194 [inline]
 __se_sys_sendto net/socket.c:2190 [inline]
 __x64_sys_sendto+0x125/0x1d0 net/socket.c:2190
 x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 9857 Comm: syz.4.1063 Tainted: G        W          6.14.0-rc1-syzkaller-00187-g8f6629c004b1 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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