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: 6942 Comm: syz-executor.0 Not tainted 5.1.0-rc5+ #179
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rt_cache_valid+0x33/0x190 net/ipv4/route.c:1531
Code: 31 e4 53 48 89 fb e8 ec 5b 95 fb 48 85 db 74 4f e8 e2 5b 95 fb 48 8d 7b 3a 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 07
RSP: 0018:ffff88808da771e8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000217 RCX: ffffc90005df3000
RDX: 000000000000004a RSI: ffffffff85db30ce RDI: 0000000000000251
RBP: ffff88808da77200 R08: ffff888088e001c0 R09: ffffed1015d25bc8
R10: ffffed1015d25bc7 R11: ffff8880ae92de3b R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000217 R15: ffff88808b4f6d40
FS:  00007f8abee49700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32926000 CR3: 0000000091878000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __mkroute_output net/ipv4/route.c:2287 [inline]
 ip_route_output_key_hash_rcu+0x89d/0x30e0 net/ipv4/route.c:2519
 ip_route_output_key_hash+0x212/0x380 net/ipv4/route.c:2348
 __ip_route_output_key include/net/route.h:124 [inline]
 ip_route_output_flow+0x28/0xc0 net/ipv4/route.c:2603
 udp_sendmsg+0x1aec/0x2820 net/ipv4/udp.c:1154
 udpv6_sendmsg+0x13a4/0x28d0 net/ipv6/udp.c:1291
 inet_sendmsg+0x147/0x5d0 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:661
 ___sys_sendmsg+0x3e2/0x930 net/socket.c:2260
 __sys_sendmmsg+0x1bf/0x4d0 net/socket.c:2355
 __do_sys_sendmmsg net/socket.c:2384 [inline]
 __se_sys_sendmmsg net/socket.c:2381 [inline]
 __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2381
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458c39
Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8abee48c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458c39
RDX: 00000000000005c3 RSI: 0000000020000240 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8abee496d4
R13: 00000000004c5e2c R14: 00000000004da5e0 R15: 00000000ffffffff
Modules linked in:
---[ end trace 37f05320a2b08234 ]---
RIP: 0010:rt_cache_valid+0x33/0x190 net/ipv4/route.c:1531
Code: 31 e4 53 48 89 fb e8 ec 5b 95 fb 48 85 db 74 4f e8 e2 5b 95 fb 48 8d 7b 3a 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 07
RSP: 0018:ffff88808da771e8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000217 RCX: ffffc90005df3000
RDX: 000000000000004a RSI: ffffffff85db30ce RDI: 0000000000000251
RBP: ffff88808da77200 R08: ffff888088e001c0 R09: ffffed1015d25bc8
R10: ffffed1015d25bc7 R11: ffff8880ae92de3b R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000217 R15: ffff88808b4f6d40
FS:  00007f8abee49700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3292a000 CR3: 0000000091878000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400