------------[ cut here ]------------
kernel BUG at net/ipv6/route.c:1473!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 20908 Comm: syz.5.4591 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:rt6_make_pcpu_route net/ipv6/route.c:1473 [inline]
RIP: 0010:ip6_pol_route+0x117d/0x1180 net/ipv6/route.c:2305
Code: 9d f8 e9 f4 fa ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 03 fb ff ff 48 89 df e8 6e 74 9d f8 e9 f6 fa ff ff e8 64 3c 3b f8 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e
RSP: 0000:ffffc900068cef60 EFLAGS: 00010293
RAX: ffffffff89846fcc RBX: ffff888126cef000 RCX: ffff88802f2abc80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900068cf080 R08: ffffe8ffffc466ef R09: 1ffffd1ffff88cdd
R10: dffffc0000000000 R11: fffff91ffff88cde R12: ffff888061aa3dc0
R13: ffffffff89845fb2 R14: dffffc0000000000 R15: 0000607ed8f576e8
FS:  00007fa4faeee6c0(0000) GS:ffff888126cef000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000029584000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 pol_lookup_func include/net/ip6_fib.h:617 [inline]
 __fib6_rule_action net/ipv6/fib6_rules.c:237 [inline]
 fib6_rule_action+0x674/0x7d0 net/ipv6/fib6_rules.c:275
 fib_rules_lookup+0x767/0xe90 net/core/fib_rules.c:339
 fib6_rule_lookup+0x18e/0x6f0 net/ipv6/fib6_rules.c:112
 ip6_route_input_lookup net/ipv6/route.c:2338 [inline]
 ip6_route_input+0x6de/0xad0 net/ipv6/route.c:2641
 ip6_rcv_finish+0x141/0x2e0 net/ipv6/ip6_input.c:77
 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318
 __netif_receive_skb_one_core net/core/dev.c:6137 [inline]
 __netif_receive_skb+0xd3/0x380 net/core/dev.c:6250
 netif_receive_skb_internal net/core/dev.c:6336 [inline]
 netif_receive_skb+0x1bb/0x750 net/core/dev.c:6395
 tun_rx_batched+0x1bf/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2abd/0x3de0 drivers/net/tun.c:1953
 tun_chr_write_iter+0x119/0x200 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5d5/0xb40 fs/read_write.c:686
 ksys_write+0x14b/0x260 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa4fcc8e1ff
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007fa4faeee000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa4fcee5fa0 RCX: 00007fa4fcc8e1ff
RDX: 000000000000004a RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fa4fcd13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000004a R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa4fcee6038 R14: 00007fa4fcee5fa0 R15: 00007fff4deff258
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:rt6_make_pcpu_route net/ipv6/route.c:1473 [inline]
RIP: 0010:ip6_pol_route+0x117d/0x1180 net/ipv6/route.c:2305
Code: 9d f8 e9 f4 fa ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 03 fb ff ff 48 89 df e8 6e 74 9d f8 e9 f6 fa ff ff e8 64 3c 3b f8 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e
RSP: 0000:ffffc900068cef60 EFLAGS: 00010293
RAX: ffffffff89846fcc RBX: ffff888126cef000 RCX: ffff88802f2abc80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900068cf080 R08: ffffe8ffffc466ef R09: 1ffffd1ffff88cdd
R10: dffffc0000000000 R11: fffff91ffff88cde R12: ffff888061aa3dc0
R13: ffffffff89845fb2 R14: dffffc0000000000 R15: 0000607ed8f576e8
FS:  00007fa4faeee6c0(0000) GS:ffff888126cef000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000029584000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400