syzbot

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memcpy: detected field-spanning write (size 16) of single field "_Generic(info, const struct ip_tunnel_info * : ((const void *)((info) + 1)), struct ip_tunnel_info * : ((void *)((info) + 1)) )" at ./include/net/ip_tunnels.h:662 (size 0)
WARNING: CPU: 0 PID: 11760 at ./include/net/ip_tunnels.h:662 ip_tunnel_info_opts_set include/net/ip_tunnels.h:662 [inline]
WARNING: CPU: 0 PID: 11760 at ./include/net/ip_tunnels.h:662 geneve_rx drivers/net/geneve.c:244 [inline]
WARNING: CPU: 0 PID: 11760 at ./include/net/ip_tunnels.h:662 geneve_udp_encap_recv+0x2498/0x2b90 drivers/net/geneve.c:401
Modules linked in:
CPU: 0 UID: 0 PID: 11760 Comm: kworker/0:6 Not tainted 6.14.0-rc5-syzkaller-00023-gbb2281fb05e5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: mld mld_ifc_work
RIP: 0010:ip_tunnel_info_opts_set include/net/ip_tunnels.h:662 [inline]
RIP: 0010:geneve_rx drivers/net/geneve.c:244 [inline]
RIP: 0010:geneve_udp_encap_recv+0x2498/0x2b90 drivers/net/geneve.c:401
Code: 31 e8 ff ff e8 89 c9 46 fb c6 05 8a e7 d7 09 01 90 31 c9 48 c7 c2 20 54 16 8c 4c 89 e6 48 c7 c7 00 55 16 8c e8 d9 f8 06 fb 90 <0f> 0b 90 90 e9 5a ec ff ff e8 5a c9 46 fb e8 75 46 c6 02 31 ff 41
RSP: 0018:ffffc900000077a0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff88805beca032 RCX: ffffffff817a2229
RDX: ffff88801eb55a00 RSI: ffffffff817a2236 RDI: 0000000000000001
RBP: ffffc900000078b8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000007 R12: 0000000000000010
R13: ffff88807f026000 R14: 0000000000000000 R15: ffff8880318aca00
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f82d5b762d8 CR3: 00000000348e6000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 udp_queue_rcv_one_skb+0xad8/0x18b0 net/ipv4/udp.c:2380
 udp_queue_rcv_skb+0x198/0xd10 net/ipv4/udp.c:2458
 udp_unicast_rcv_skb+0x165/0x3b0 net/ipv4/udp.c:2618
 __udp4_lib_rcv+0x25fd/0x34e0 net/ipv4/udp.c:2694
 ip_protocol_deliver_rcu+0x2ff/0x4c0 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x316/0x570 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:469 [inline]
 ip_rcv_finish net/ipv4/ip_input.c:447 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip_rcv+0x2c3/0x5d0 net/ipv4/ip_input.c:567
 __netif_receive_skb_one_core+0x199/0x1e0 net/core/dev.c:5893
 __netif_receive_skb+0x1d/0x160 net/core/dev.c:6006
 process_backlog+0x443/0x15f0 net/core/dev.c:6354
 __napi_poll.constprop.0+0xba/0x550 net/core/dev.c:7188
 napi_poll net/core/dev.c:7257 [inline]
 net_rx_action+0xa94/0x1010 net/core/dev.c:7379
 handle_softirqs+0x216/0x8f0 kernel/softirq.c:561
 do_softirq kernel/softirq.c:462 [inline]
 do_softirq+0xb2/0xf0 kernel/softirq.c:449
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x100/0x120 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+0x8b0/0x43e0 net/core/dev.c:4676
 dev_queue_xmit include/linux/netdevice.h:3313 [inline]
 neigh_hh_output include/net/neighbour.h:523 [inline]
 neigh_output include/net/neighbour.h:537 [inline]
 ip6_finish_output2+0xed9/0x20a0 net/ipv6/ip6_output.c:141
 __ip6_finish_output net/ipv6/ip6_output.c:215 [inline]
 ip6_finish_output+0x3f9/0x1360 net/ipv6/ip6_output.c:226
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip6_output+0x1f8/0x540 net/ipv6/ip6_output.c:247
 dst_output include/net/dst.h:459 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 mld_sendpack+0x9f0/0x11d0 net/ipv6/mcast.c:1868
 mld_send_cr net/ipv6/mcast.c:2169 [inline]
 mld_ifc_work+0x740/0xca0 net/ipv6/mcast.c:2702
 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
 kthread+0x3b2/0x750 kernel/kthread.c:464
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>