kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 47 Comm: kworker/u4:2 Not tainted 4.16.0+ #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: rpciod rpc_async_schedule
RIP: 0010:strlen+0x1f/0xa0 lib/string.c:479
RSP: 0018:ffff8801d99af318 EFLAGS: 00010296
RAX: dffffc0000000000 RBX: ffff8801d70d3100 RCX: ffffffff86a8c407
RDX: 0000000000000000 RSI: ffffffff86a84d7b RDI: 0000000000000000
RBP: ffff8801d99af330 R08: ffff8801d99a2480 R09: ffffed003670aa72
R10: ffffed003670aa72 R11: ffff8801b3855397 R12: 0000000000000000
R13: 0000000002000000 R14: 0000000000000000 R15: ffff8801d99af3e0
FS:  0000000000000000(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004d91e4 CR3: 00000001ccd67000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000020000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 strlen include/linux/string.h:267 [inline]
 encode_rpcb_string+0x23/0x70 net/sunrpc/rpcb_clnt.c:914
 rpcb_enc_getaddr+0x146/0x1f0 net/sunrpc/rpcb_clnt.c:940
 rpcauth_wrap_req_encode net/sunrpc/auth.c:777 [inline]
 rpcauth_wrap_req+0x1a8/0x230 net/sunrpc/auth.c:791
 rpc_xdr_encode net/sunrpc/clnt.c:1754 [inline]
 call_transmit+0x8a9/0xfe0 net/sunrpc/clnt.c:1949
 __rpc_execute+0x28a/0xfe0 net/sunrpc/sched.c:784
 rpc_async_schedule+0x16/0x20 net/sunrpc/sched.c:857
 process_one_work+0xc1e/0x1b50 kernel/workqueue.c:2145
 worker_thread+0x1cc/0x1440 kernel/workqueue.c:2279
 kthread+0x345/0x410 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411
Code: 37 ff ff ff 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 c1 ea 03 48 89 e5 41 54 49 89 fc 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 4d 41 80 3c 
RIP: strlen+0x1f/0xa0 lib/string.c:479 RSP: ffff8801d99af318
---[ end trace 746fa37a9224dc66 ]---