[Bugs] [Bug 1479030] New: [NFS] nfs process crashed in "nfs3_getattr"

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1479030

            Bug ID: 1479030
           Summary: [NFS] nfs process crashed in "nfs3_getattr"
           Product: GlusterFS
           Version: mainline
         Component: nfs
          Severity: medium
          Assignee: bugs at gluster.org
          Reporter: jthottan at redhat.com
                CC: amukherj at redhat.com, bugs at gluster.org,
                    jthottan at redhat.com, msaini at redhat.com,
                    ndevos at redhat.com, rallan at redhat.com,
                    rhinduja at redhat.com, rhs-bugs at redhat.com,
                    skoduri at redhat.com, storage-qa-internal at redhat.com
            Blocks: 1476871



+++ This bug was initially created as a clone of Bug #1476871 +++

Description:
============

add missing NULL check in nfs3_call_state_wipe() 

(gdb) bt
#0  0x00007ff1cfea9205 in _gf_ref_put (ref=ref at entry=0x0) at refcount.c:36
#1  0x00007ff1c1997455 in nfs3_call_state_wipe (cs=cs at entry=0x0) at nfs3.c:559
#2  0x00007ff1c1998931 in nfs3_getattr (req=req at entry=0x7ff1bc0b26d0,
fh=fh at entry=0x7ff1c2f76ae0) at nfs3.c:962
#3  0x00007ff1c1998c8a in nfs3svc_getattr (req=0x7ff1bc0b26d0) at nfs3.c:987
#4  0x00007ff1cfbfd8c5 in rpcsvc_handle_rpc_call (svc=0x7ff1bc03e500,
trans=trans at entry=0x7ff1bc0c8020, msg=<optimized out>) at rpcsvc.c:695
#5  0x00007ff1cfbfdaab in rpcsvc_notify (trans=0x7ff1bc0c8020,
mydata=<optimized out>, event=<optimized out>, data=<optimized out>) at
rpcsvc.c:789
#6  0x00007ff1cfbff9e3 in rpc_transport_notify (this=this at entry=0x7ff1bc0c8020,
event=event at entry=RPC_TRANSPORT_MSG_RECEIVED, data=data at entry=0x7ff1bc0038d0)
    at rpc-transport.c:538
#7  0x00007ff1c4a2e3d6 in socket_event_poll_in (this=this at entry=0x7ff1bc0c8020,
notify_handled=<optimized out>) at socket.c:2306
#8  0x00007ff1c4a3097c in socket_event_handler (fd=21, idx=9, gen=19,
data=0x7ff1bc0c8020, poll_in=1, poll_out=0, poll_err=0) at socket.c:2458
#9  0x00007ff1cfe950f6 in event_dispatch_epoll_handler (event=0x7ff1c2f76e80,
event_pool=0x5618154d5ee0) at event-epoll.c:572
#10 event_dispatch_epoll_worker (data=0x56181551cbd0) at event-epoll.c:648
#11 0x00007ff1cec99e25 in start_thread () from /lib64/libpthread.so.0
#12 0x00007ff1ce56634d in clone () from /lib64/libc.so.6
(gdb) 


Version:
========
mainline


How to reproduce:
=================
[Unknown] Hit above crash multiple times


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1476871
[Bug 1476871] [NFS] nfs process crashed in "nfs3_getattr"
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