netlink: 168 bytes leftover after parsing attributes in process `syz-executor.3'.
general protection fault, probably for non-canonical address 0xdffffc0000000010: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000080-0x0000000000000087]
CPU: 1 PID: 21383 Comm: syz-executor.3 Not tainted 5.8.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:fib_check_nexthop+0x198/0x660 net/ipv4/nexthop.c:733
Code: 48 c1 ea 03 80 3c 02 00 0f 85 7b 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 10 48 8d bb 80 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4b 04 00 00 48 8b 9b 80 00 00 00 48 b8 00 00 00
RSP: 0018:ffffc9001929f320 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000f0f9000
RDX: 0000000000000010 RSI: ffffffff86c8047d RDI: 0000000000000080
RBP: 000000000000007c R08: 0000000000000001 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc9001929f8c0
R13: 0000000000000001 R14: ffff88804ad48000 R15: ffff888063e55980
FS:  00007fa686849700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcf3f4e9f0 CR3: 00000000a798d000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fib_create_info+0x1ae8/0x49e0 net/ipv4/fib_semantics.c:1490
 fib_table_insert+0x1c7/0x1af0 net/ipv4/fib_trie.c:1189
 inet_rtm_newroute+0x109/0x1e0 net/ipv4/fib_frontend.c:883
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5563
 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2470
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:671
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2359
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2413
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2446
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ce69
Code: 2d b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa686848c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000002bf00 RCX: 000000000045ce69
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007fffdf4aaf5f R14: 00007fa6868499c0 R15: 000000000118bf2c
Modules linked in:
---[ end trace 51b60e7706fe30c8 ]---
RIP: 0010:fib_check_nexthop+0x198/0x660 net/ipv4/nexthop.c:733
Code: 48 c1 ea 03 80 3c 02 00 0f 85 7b 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 10 48 8d bb 80 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4b 04 00 00 48 8b 9b 80 00 00 00 48 b8 00 00 00
RSP: 0018:ffffc9001929f320 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000f0f9000
RDX: 0000000000000010 RSI: ffffffff86c8047d RDI: 0000000000000080
RBP: 000000000000007c R08: 0000000000000001 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc9001929f8c0
R13: 0000000000000001 R14: ffff88804ad48000 R15: ffff888063e55980
FS:  00007fa686849700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6711bea000 CR3: 00000000a798d000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400