------------[ cut here ]------------
kernel BUG at net/ipv6/ip6_fib.c:1224!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 7478 Comm: kworker/u8:48 Not tainted 6.16.0-syzkaller-02094-g86aa72182095 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:fib6_add_rt2node+0x3386/0x33a0 net/ipv6/ip6_fib.c:1224
Code: 6b 97 f7 90 0f 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c c4 fa ff ff 4c 89 ff e8 75 84 f9 f7 e9 b7 fa ff ff e8 db 6a 97 f7 90 <0f> 0b e8 d3 6a 97 f7 e9 98 fb ff ff 66 66 66 66 66 2e 0f 1f 84 00
RSP: 0018:ffffc90003bff260 EFLAGS: 00010293
RAX: ffffffff8a27e9f5 RBX: ffff888034873c00 RCX: ffff88801e36da00
RDX: 0000000000000000 RSI: 00000000ffff0000 RDI: 0000000000000000
RBP: ffffc90003bff450 R08: ffffc90003bff510 R09: 0000000000000050
R10: 0000000000000000 R11: fffff5200077fea4 R12: ffff888034873c00
R13: ffff888034873c00 R14: 0000000000000000 R15: 00000000ffff0000
FS:  0000000000000000(0000) GS:ffff888125d86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc7ccfc8f98 CR3: 0000000058870000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 fib6_add+0x8da/0x18a0 net/ipv6/ip6_fib.c:1535
 __ip6_ins_rt net/ipv6/route.c:1351 [inline]
 ip6_ins_rt+0xc8/0x120 net/ipv6/route.c:1361
 __ipv6_ifa_notify+0x63f/0xac0 net/ipv6/addrconf.c:6281
 ipv6_ifa_notify net/ipv6/addrconf.c:6320 [inline]
 addrconf_dad_completed+0x180/0xd60 net/ipv6/addrconf.c:4319
 addrconf_dad_work+0xc36/0x14b0 net/ipv6/addrconf.c:-1
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fib6_add_rt2node+0x3386/0x33a0 net/ipv6/ip6_fib.c:1224
Code: 6b 97 f7 90 0f 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c c4 fa ff ff 4c 89 ff e8 75 84 f9 f7 e9 b7 fa ff ff e8 db 6a 97 f7 90 <0f> 0b e8 d3 6a 97 f7 e9 98 fb ff ff 66 66 66 66 66 2e 0f 1f 84 00
RSP: 0018:ffffc90003bff260 EFLAGS: 00010293
RAX: ffffffff8a27e9f5 RBX: ffff888034873c00 RCX: ffff88801e36da00
RDX: 0000000000000000 RSI: 00000000ffff0000 RDI: 0000000000000000
RBP: ffffc90003bff450 R08: ffffc90003bff510 R09: 0000000000000050
R10: 0000000000000000 R11: fffff5200077fea4 R12: ffff888034873c00
R13: ffff888034873c00 R14: 0000000000000000 R15: 00000000ffff0000
FS:  0000000000000000(0000) GS:ffff888125d86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc7ccfc8f98 CR3: 000000000df36000 CR4: 0000000000350ef0