kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 10502 Comm: syz-executor.5 Not tainted 4.14.134 #30
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88805b7002c0 task.stack: ffff88805ba58000
RIP: 0010:rxrpc_connect_call+0xc9/0x41a0 net/rxrpc/conn_client.c:684
RSP: 0018:ffff88805ba5f738 EFLAGS: 00010206
kobject: 'loop0' (ffff8880566b6360): kobject_uevent_env
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90009a5b000
RDX: 0000000000000003 RSI: ffffffff8593c089 RDI: 0000000000000018
RBP: ffff88805ba5f880 R08: 0000000000000001 R09: ffff88805b700b60
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888099b43c00
kobject: 'loop0' (ffff8880566b6360): fill_kobj_path: path = '/devices/virtual/block/loop0'
R13: ffff88805d028720 R14: ffff88805d028710 R15: ffff88805ba5f998
FS:  00007fcd5dbe6700(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffbe2870028 CR3: 00000000a4ba0000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rxrpc_new_client_call+0x8f7/0x1420 net/rxrpc/call_object.c:276
 rxrpc_new_client_call_for_sendmsg net/rxrpc/sendmsg.c:525 [inline]
 rxrpc_do_sendmsg+0x91a/0x1103 net/rxrpc/sendmsg.c:577
 rxrpc_sendmsg+0x48a/0x650 net/rxrpc/af_rxrpc.c:543
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xce/0x110 net/socket.c:656
 ___sys_sendmsg+0x349/0x840 net/socket.c:2062
 __sys_sendmmsg+0x152/0x3a0 net/socket.c:2152
 SYSC_sendmmsg net/socket.c:2183 [inline]
 SyS_sendmmsg+0x35/0x60 net/socket.c:2178
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
kobject: 'loop4' (ffff8880a4b24360): kobject_uevent_env
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459829
RSP: 002b:00007fcd5dbe5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000459829
RDX: 0000000000000001 RSI: 0000000020005c00 RDI: 0000000000000003
kobject: 'loop4' (ffff8880a4b24360): fill_kobj_path: path = '/devices/virtual/block/loop4'
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcd5dbe66d4
R13: 00000000004c7000 R14: 00000000004dc570 R15: 00000000ffffffff
Code: e8 03 80 3c 18 00 0f 85 6f 39 00 00 48 8b 85 28 ff ff ff 48 8b 18 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 8a 39 00 00 48 8b 5b 18 48 8d bb 00 02 00 00 
RIP: rxrpc_connect_call+0xc9/0x41a0 net/rxrpc/conn_client.c:684 RSP: ffff88805ba5f738
kobject: 'loop1' (ffff8880a4a1aaa0): kobject_uevent_env
---[ end trace 37777c54b7ffd560 ]---