------------[ cut here ]------------
kernel BUG at net/ipv6/ip6_fib.c:1217!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 9072 Comm: syz.5.671 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:fib6_add_rt2node+0x3433/0x3470 net/ipv6/ip6_fib.c:1217
Code: ff ff 48 8b 4c 24 08 80 e1 07 80 c1 03 38 c1 0f 8c a4 f9 ff ff 48 8b 7c 24 08 e8 88 90 18 f8 e9 95 f9 ff ff e8 9e f3 b1 f7 90 <0f> 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 7a fa ff ff 4c 89 ff
RSP: 0018:ffffc90003b37660 EFLAGS: 00010287
RAX: ffffffff8a0fbe92 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc9001b549000 RSI: 0000000000000638 RDI: 0000000000000639
RBP: ffffc90003b37850 R08: ffffc90003b37910 R09: 0000000000000050
R10: 0000000000000000 R11: fffff52000766f24 R12: ffff888028a6fc18
R13: ffff888028a6fc00 R14: dffffc0000000000 R15: 0000000000000002
FS:  00007fec647ba6c0(0000) GS:ffff888125f34000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000032dee000 CR4: 00000000003526f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 fib6_add+0x8da/0x18a0 net/ipv6/ip6_fib.c:1532
 __ip6_ins_rt net/ipv6/route.c:1351 [inline]
 ip6_route_add+0xde/0x1b0 net/ipv6/route.c:3946
 ipv6_route_ioctl+0x35c/0x480 net/ipv6/route.c:4571
 inet6_ioctl+0x219/0x280 net/ipv6/af_inet6.c:577
 sock_do_ioctl+0xdc/0x300 net/socket.c:1254
 sock_ioctl+0x576/0x790 net/socket.c:1375
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fec6398f749
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:00007fec647ba038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fec63be6090 RCX: 00007fec6398f749
RDX: 0000200000000000 RSI: 000000000000890b RDI: 000000000000000e
RBP: 00007fec63a13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fec63be6128 R14: 00007fec63be6090 R15: 00007fffba76b4a8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fib6_add_rt2node+0x3433/0x3470 net/ipv6/ip6_fib.c:1217
Code: ff ff 48 8b 4c 24 08 80 e1 07 80 c1 03 38 c1 0f 8c a4 f9 ff ff 48 8b 7c 24 08 e8 88 90 18 f8 e9 95 f9 ff ff e8 9e f3 b1 f7 90 <0f> 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 7a fa ff ff 4c 89 ff
RSP: 0018:ffffc90003b37660 EFLAGS: 00010287
RAX: ffffffff8a0fbe92 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc9001b549000 RSI: 0000000000000638 RDI: 0000000000000639
RBP: ffffc90003b37850 R08: ffffc90003b37910 R09: 0000000000000050
R10: 0000000000000000 R11: fffff52000766f24 R12: ffff888028a6fc18
R13: ffff888028a6fc00 R14: dffffc0000000000 R15: 0000000000000002
FS:  00007fec647ba6c0(0000) GS:ffff888125f34000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000032dee000 CR4: 00000000003526f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600