Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f041b3cb168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f041c178f80 RCX: 00007f041c059389 RDX: 0000000020000000 RSI: 000000000000890b RDI: 0000000000000005 RBP: 00007f041b3cb1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff87bdd55f R14: 00007f041b3cb300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5945 at net/ipv6/ip6_fib.c:1504 fib6_find_prefix net/ipv6/ip6_fib.c:1750 [inline] WARNING: CPU: 1 PID: 5945 at net/ipv6/ip6_fib.c:1504 fib6_add+0x2959/0x3580 net/ipv6/ip6_fib.c:1500 Modules linked in: CPU: 1 PID: 5945 Comm: syz-executor.0 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:fib6_add+0x2959/0x3580 net/ipv6/ip6_fib.c:1504 Code: 00 00 00 fc ff df 48 8d bb 90 0a 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d1 08 00 00 48 8b 9b 90 0a 00 00 e9 34 f8 ff ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 30 48 c1 ea 03 80 RSP: 0018:ffffc90001ad78f0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8737191a RDX: 1ffff1100792e604 RSI: ffff88803c973580 RDI: ffff88803c973020 RBP: ffff88803c9735a0 R08: 0000000000000001 R09: ffff888016b4702f R10: ffffed1002d68e05 R11: 6637303030302052 R12: ffff888016b4702c R13: 0000000000000000 R14: ffff888015f58000 R15: 00000000ffffffff FS: 00007f041b3cb700(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f041b3caff8 CR3: 0000000016ec3000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __ip6_ins_rt net/ipv6/route.c:1317 [inline] ip6_route_add+0x65/0xf0 net/ipv6/route.c:3745 ipv6_route_ioctl+0x3a3/0x520 net/ipv6/route.c:4365 inet6_ioctl+0x1c2/0x220 net/ipv6/af_inet6.c:561 sock_do_ioctl+0xc6/0x210 net/socket.c:1037 sock_ioctl+0x3bf/0x570 net/socket.c:1177 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:739 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f041c059389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f041b3cb168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f041c178f80 RCX: 00007f041c059389 RDX: 0000000020000000 RSI: 000000000000890b RDI: 0000000000000005 RBP: 00007f041b3cb1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff87bdd55f R14: 00007f041b3cb300 R15: 0000000000022000 ---------------- 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 f1 19 00 00 callq 0x1a01 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 b8 ff ff ff mov $0xffffffffffffffb8,%rcx 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W