------------[ cut here ]------------
memcpy: detected field-spanning write (size 64) of single field "&top_iph->saddr" at net/ipv6/ah6.c:439 (size 16)
WARNING: CPU: 0 PID: 21386 at net/ipv6/ah6.c:439 ah6_output+0xec3/0x1500 net/ipv6/ah6.c:439
Modules linked in:
CPU: 0 UID: 0 PID: 21386 Comm: syz.2.4278 Not tainted 6.17.0-rc1-syzkaller-00127-g715c7a36d59f #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:ah6_output+0xec3/0x1500 net/ipv6/ah6.c:439
Code: ff e8 01 4c 7d f7 c6 05 bf 19 4b 05 01 90 b9 10 00 00 00 48 c7 c7 80 6a a2 8c 4c 89 f6 48 c7 c2 e0 6c a2 8c e8 7e ea 40 f7 90 <0f> 0b 90 90 e9 ab fe ff ff e8 2f f7 36 01 48 8b 4c 24 28 80 e1 07
RSP: 0018:ffffc90014686e00 EFLAGS: 00010246
RAX: c7b6ca34eb06ae00 RBX: ffff888058d3f408 RCX: 0000000000080000
RDX: ffffc9001150d000 RSI: 0000000000005071 RDI: 0000000000005072
RBP: ffffc90014686f90 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6
R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: dffffc0000000000
R13: 1ffff920028d0de0 R14: 0000000000000040 R15: 0000000000000048
FS:  00007f4cde4246c0(0000) GS:ffff888125c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000068c0 CR3: 00000000290fc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 xfrm_output_one net/xfrm/xfrm_output.c:555 [inline]
 xfrm_output_resume+0x2c52/0x6170 net/xfrm/xfrm_output.c:590
 __xfrm6_output+0x2ed/0x1070 net/ipv6/xfrm6_output.c:103
 NF_HOOK_COND include/linux/netfilter.h:307 [inline]
 xfrm6_output+0x1c6/0x4f0 net/ipv6/xfrm6_output.c:108
 ip6_send_skb+0x1d5/0x390 net/ipv6/ip6_output.c:1984
 udp_v6_send_skb+0xc17/0x1830 net/ipv6/udp.c:1439
 udpv6_sendmsg+0x1baf/0x24b0 net/ipv6/udp.c:1730
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0xe5/0x270 net/socket.c:729
 ____sys_sendmsg+0x52d/0x830 net/socket.c:2614
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668
 __sys_sendmmsg+0x227/0x430 net/socket.c:2757
 __do_sys_sendmmsg net/socket.c:2784 [inline]
 __se_sys_sendmmsg net/socket.c:2781 [inline]
 __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2781
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4cdd58ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4cde424038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f4cdd7b5fa0 RCX: 00007f4cdd58ebe9
RDX: 0000000000000009 RSI: 0000200000007f40 RDI: 000000000000000a
RBP: 00007f4cdd611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4cdd7b6038 R14: 00007f4cdd7b5fa0 R15: 00007ffdbae5aa38
 </TASK>