Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc254f8ea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f4e831dbd99 RDX: 0000000020000000 RSI: 000000000000890b RDI: 0000000000000005 RBP: 00007ffc254f8ec0 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 R13: 00000000000f4240 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5010 at net/ipv6/ip6_fib.c:1506 fib6_add+0x3669/0x4080 net/ipv6/ip6_fib.c:1506 Modules linked in: CPU: 0 PID: 5010 Comm: syz-executor374 Not tainted 6.4.0-rc7-syzkaller-00216-g8a9922e7be6d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:fib6_add+0x3669/0x4080 net/ipv6/ip6_fib.c:1506 Code: 00 00 48 8b 9b 58 0b 00 00 e9 67 f2 ff ff e8 5e 0d b1 f8 be 02 00 00 00 4c 89 f7 e8 41 21 40 fb e9 ac e2 ff ff e8 47 0d b1 f8 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 48 48 c1 ea 03 80 RSP: 0018:ffffc90003b9f8c8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8880273ebb80 RSI: ffffffff88d33c19 RDI: ffff888028947e20 RBP: ffff888028947ca0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 00000000ffffffff R13: 0000000000000000 R14: ffff88814569a42c R15: ffff88807da90000 FS: 0000555555ae1300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4e832116a0 CR3: 000000002a653000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __ip6_ins_rt net/ipv6/route.c:1301 [inline] ip6_route_add+0x8f/0x150 net/ipv6/route.c:3839 ipv6_route_ioctl+0x3fc/0x570 net/ipv6/route.c:4459 inet6_ioctl+0x246/0x290 net/ipv6/af_inet6.c:569 sock_do_ioctl+0xcc/0x230 net/socket.c:1201 sock_ioctl+0x1f8/0x680 net/socket.c:1318 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f4e831dbd99 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc254f8ea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f4e831dbd99 RDX: 0000000020000000 RSI: 000000000000890b RDI: 0000000000000005 RBP: 00007ffc254f8ec0 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 R13: 00000000000f4240 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 28 00 sub %al,(%rax) 2: 00 00 add %al,(%rax) 4: 75 05 jne 0xb 6: 48 83 c4 28 add $0x28,%rsp a: c3 retq b: e8 41 15 00 00 callq 0x1551 10: 90 nop 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall * 2a: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 retq 33: 48 c7 c1 c0 ff ff ff mov $0xffffffffffffffc0,%rcx 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W