RBP: 00007f6779a72ca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 00007ffcd3439b5f R14: 00007f6779a739c0 R15: 000000000118cf4c kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 15972 Comm: syz-executor.4 Not tainted 5.4.60-syzkaller-00680-gd457f47f3685 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:nexthop_create_group net/ipv4/nexthop.c:1127 [inline] RIP: 0010:nexthop_add net/ipv4/nexthop.c:1304 [inline] RIP: 0010:rtm_new_nexthop+0x265e/0x6ba0 net/ipv4/nexthop.c:1503 Code: 00 80 3c 01 00 74 0a 48 8b 7c 24 18 e8 5b f0 01 fe 48 8b 44 24 18 48 89 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 34 f0 01 fe 48 8b 44 24 18 48 89 03 RSP: 0018:ffff8881c898f0e0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: ffffc90004c83000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffff8881c898f4d0 R08: ffffffff836eaf5a R09: fffffbfff098c406 R10: fffffbfff098c406 R11: 0000000000000000 R12: 00000000000000e1 R13: ffff8881d1ee7b50 R14: 0000000000000000 R15: 0000000000010000 FS: 00007f6779a73700(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000300 CR3: 00000001d0f86004 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rtnetlink_rcv_msg+0x96e/0xc60 net/core/rtnetlink.c:5255 netlink_rcv_skb+0x200/0x480 net/netlink/af_netlink.c:2478 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x8ad/0xa50 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x9de/0xd80 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] ____sys_sendmsg+0x58a/0x8d0 net/socket.c:2298 ___sys_sendmsg net/socket.c:2352 [inline] __sys_sendmsg+0x2cd/0x3b0 net/socket.c:2398 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d4d9 Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6779a72c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002cd80 RCX: 000000000045d4d9 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000003 RBP: 00007f6779a72ca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 00007ffcd3439b5f R14: 00007f6779a739c0 R15: 000000000118cf4c Modules linked in: ---[ end trace ebfd2dd7c34824e1 ]--- RIP: 0010:nexthop_create_group net/ipv4/nexthop.c:1127 [inline] RIP: 0010:nexthop_add net/ipv4/nexthop.c:1304 [inline] RIP: 0010:rtm_new_nexthop+0x265e/0x6ba0 net/ipv4/nexthop.c:1503 Code: 00 80 3c 01 00 74 0a 48 8b 7c 24 18 e8 5b f0 01 fe 48 8b 44 24 18 48 89 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 34 f0 01 fe 48 8b 44 24 18 48 89 03 RSP: 0018:ffff8881c898f0e0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: ffffc90004c83000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffff8881c898f4d0 R08: ffffffff836eaf5a R09: fffffbfff098c406 R10: fffffbfff098c406 R11: 0000000000000000 R12: 00000000000000e1 R13: ffff8881d1ee7b50 R14: 0000000000000000 R15: 0000000000010000 FS: 00007f6779a73700(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001590004 CR3: 00000001d0f86005 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400