------------[ cut here ]------------
memcpy: detected field-spanning write (size 4524) of single field "pfx->in6_u.u6_addr8" at ./include/net/ipv6.h:614 (size 16)
WARNING: CPU: 0 PID: 12460 at ./include/net/ipv6.h:614 ipv6_addr_prefix+0x124/0x1d0 include/net/ipv6.h:614
Modules linked in:
CPU: 0 UID: 0 PID: 12460 Comm: syz.0.1448 Not tainted 6.15.0-rc4-syzkaller-00701-g337079d31fb1 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:ipv6_addr_prefix+0x124/0x1d0 include/net/ipv6.h:614
Code: cc e8 a0 56 b2 f7 c6 05 1e cd 5b 05 01 90 b9 10 00 00 00 48 c7 c7 a0 59 7d 8c 4c 89 fe 48 c7 c2 c0 60 7d 8c e8 cd b2 76 f7 90 <0f> 0b 90 90 e9 33 ff ff ff e8 6e 56 b2 f7 44 89 e6 48 c7 c7 c0 10
RSP: 0018:ffffc90003c6f920 EFLAGS: 00010246
RAX: b1df7097662c9400 RBX: ffff88805090d068 RCX: 0000000000080000
RDX: ffffc9000be9a000 RSI: 0000000000001fad RDI: 0000000000001fae
RBP: 0000000000000004 R08: ffff8880b8823e93 R09: 1ffff110171047d2
R10: dffffc0000000000 R11: ffffed10171047d3 R12: 00000000000011ac
R13: 1ffff9200078df4e R14: ffffc90003c6fa94 R15: 00000000000011ac
FS:  00007f85f003f6c0(0000) GS:ffff8881260c1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c37e7cf CR3: 0000000058a60000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ip6_route_info_create+0x629/0xa70 net/ipv6/route.c:3821
 ip6_route_add+0x29/0x2f0 net/ipv6/route.c:3909
 ipv6_route_ioctl+0x35c/0x480 net/ipv6/route.c:4546
 inet6_ioctl+0x219/0x280 net/ipv6/af_inet6.c:577
 sock_do_ioctl+0xd9/0x300 net/socket.c:1190
 sock_ioctl+0x576/0x790 net/socket.c:1311
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f85ef18e969
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:00007f85f003f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f85ef3b5fa0 RCX: 00007f85ef18e969
RDX: 0000200000000000 RSI: 000000000000890b RDI: 000000000000000b
RBP: 00007f85ef210ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f85ef3b5fa0 R15: 00007ffde7907ce8
 </TASK>