=====================================================
BUG: KMSAN: uninit-value in eth_skb_pkt_type include/linux/etherdevice.h:628 [inline]
BUG: KMSAN: uninit-value in eth_type_trans+0x7d5/0x9b0 net/ethernet/eth.c:165
 eth_skb_pkt_type include/linux/etherdevice.h:628 [inline]
 eth_type_trans+0x7d5/0x9b0 net/ethernet/eth.c:165
 ip_tunnel_rcv+0x215f/0x29c0 net/ipv4/ip_tunnel.c:439
 erspan_rcv net/ipv4/ip_gre.c:356 [inline]
 gre_rcv+0x1ca4/0x20f0 net/ipv4/ip_gre.c:460
 gre_rcv+0x285/0x380 net/ipv4/gre_demux.c:163
 ip_protocol_deliver_rcu+0xb3d/0x13d0 net/ipv4/ip_input.c:207
 ip_local_deliver_finish+0x409/0x720 net/ipv4/ip_input.c:241
 NF_HOOK include/linux/netfilter.h:318 [inline]
 ip_local_deliver+0x228/0x4a0 net/ipv4/ip_input.c:262
 dst_input include/net/dst.h:480 [inline]
 ip_rcv_finish+0x4d7/0x560 net/ipv4/ip_input.c:453
 NF_HOOK include/linux/netfilter.h:318 [inline]
 ip_rcv+0xcb/0x370 net/ipv4/ip_input.c:573
 __netif_receive_skb_one_core net/core/dev.c:6164 [inline]
 __netif_receive_skb net/core/dev.c:6277 [inline]
 process_backlog+0x8d7/0x1500 net/core/dev.c:6628
 __napi_poll+0xdc/0x950 net/core/dev.c:7692
 napi_poll net/core/dev.c:7755 [inline]
 net_rx_action+0xa5b/0x1c70 net/core/dev.c:7912
 handle_softirqs+0x171/0x7e0 kernel/softirq.c:622
 __do_softirq+0x14/0x1b kernel/softirq.c:656
 do_softirq+0x58/0x90 kernel/softirq.c:523
 __local_bh_enable_ip+0xa1/0xb0 kernel/softirq.c:450
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:924 [inline]
 __dev_queue_xmit+0x384a/0x5980 net/core/dev.c:4873
 dev_queue_xmit include/linux/netdevice.h:3384 [inline]
 neigh_resolve_output+0x9c3/0xaf0 net/core/neighbour.c:1620
 neigh_output include/net/neighbour.h:556 [inline]
 ip_finish_output2+0x1afd/0x1e00 net/ipv4/ip_output.c:237
 __ip_finish_output net/ipv4/ip_output.c:-1 [inline]
 ip_finish_output+0x288/0x860 net/ipv4/ip_output.c:325
 NF_HOOK_COND include/linux/netfilter.h:307 [inline]
 ip_mc_output+0x58a/0x8c0 net/ipv4/ip_output.c:422
 dst_output include/net/dst.h:470 [inline]
 NF_HOOK+0x16b/0x340 include/linux/netfilter.h:318
 raw_send_hdrinc+0x18c5/0x1f40 net/ipv4/raw.c:412
 raw_sendmsg+0x2280/0x27f0 net/ipv4/raw.c:645
 inet_sendmsg+0x265/0x290 net/ipv4/af_inet.c:865
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 sock_write_iter+0x667/0x7e0 net/socket.c:1195
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0xbe1/0x15c0 fs/read_write.c:688
 ksys_write+0x1d9/0x470 fs/read_write.c:740
 __do_sys_write fs/read_write.c:751 [inline]
 __se_sys_write fs/read_write.c:748 [inline]
 __ia32_sys_write+0x9a/0xf0 fs/read_write.c:748
 ia32_sys_call+0x37a7/0x4360 arch/x86/include/generated/asm/syscalls_32.h:5
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x17f/0x3f0 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/syscall_32.c:332
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:370
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4545 [inline]
 slab_alloc_node mm/slub.c:4866 [inline]
 kmem_cache_alloc_node_noprof+0x3cd/0x12d0 mm/slub.c:4918
 kmalloc_reserve net/core/skbuff.c:613 [inline]
 __alloc_skb+0x855/0x1190 net/core/skbuff.c:713
 alloc_skb include/linux/skbuff.h:1383 [inline]
 alloc_skb_with_frags+0xc5/0xa60 net/core/skbuff.c:6763
 sock_alloc_send_pskb+0xacb/0xc60 net/core/sock.c:2995
 sock_alloc_send_skb include/net/sock.h:1894 [inline]
 raw_send_hdrinc+0x34d/0x1f40 net/ipv4/raw.c:353
 raw_sendmsg+0x2280/0x27f0 net/ipv4/raw.c:645
 inet_sendmsg+0x265/0x290 net/ipv4/af_inet.c:865
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 sock_write_iter+0x667/0x7e0 net/socket.c:1195
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0xbe1/0x15c0 fs/read_write.c:688
 ksys_write+0x1d9/0x470 fs/read_write.c:740
 __do_sys_write fs/read_write.c:751 [inline]
 __se_sys_write fs/read_write.c:748 [inline]
 __ia32_sys_write+0x9a/0xf0 fs/read_write.c:748
 ia32_sys_call+0x37a7/0x4360 arch/x86/include/generated/asm/syscalls_32.h:5
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x17f/0x3f0 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/syscall_32.c:332
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:370
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

CPU: 0 UID: 0 PID: 10812 Comm: syz.4.1546 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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