[Bugs] [Bug 1477190] New: [GNFS] GNFS got crashed while mounting volume on solaris client

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1477190

            Bug ID: 1477190
           Summary: [GNFS] GNFS got crashed while mounting volume on
                    solaris client
           Product: GlusterFS
           Version: 3.12
         Component: nfs
          Keywords: Regression
          Priority: urgent
          Assignee: bugs at gluster.org
          Reporter: ndevos at redhat.com
                CC: bugs at gluster.org
        Depends On: 1468291
            Blocks: 1472773, 1473826 (glusterfs-3.12.0)



+++ This bug was initially created as a clone of Bug #1472773 +++

Description of problem:

GNFS got crashed while mounting volume on solaris client

Version-Release number of selected component (if applicable):
Any version with https://review.gluster.org/17822

How reproducible:
Consistently

Steps to Reproduce:
1.Create a Volume 2*(4+2) Distributed-Disperse Volume
2.Export the volume via GNFS.Set nfs.disable to off
3.Mount the volume to solaris client

# mount -o proto=tcp,vers=3 nfs://10.70.41.251:/disperseVol /mnt/GNFS_mani/
nfs mount: 10.70.41.251: : RPC: Program not registered
nfs mount: retrying: /mnt/GNFS_mani


Actual results:
GNFS got crashed 

Expected results:
GNFS should not get crash

Additional info:

(gdb) bt
#0  0x00007f8b43d91205 in _gf_ref_put (ref=ref at entry=0x0) at refcount.c:36
#1  0x00007f8b35820455 in nfs3_call_state_wipe (cs=cs at entry=0x0) at nfs3.c:559
#2  0x00007f8b35823dd2 in nfs3_lookup (req=req at entry=0x7f8b3015f3f0,
fh=fh at entry=0x7f8b37066ad0, 
    fhlen=<optimized out>, name=name at entry=0x7f8b37066b10 "disperseVol") at
nfs3.c:1586
#3  0x00007f8b35824408 in nfs3svc_lookup (req=0x7f8b3015f3f0) at nfs3.c:1615
#4  0x00007f8b43ae58c5 in rpcsvc_handle_rpc_call (svc=0x7f8b3006b9f0,
trans=trans at entry=0x7f8b30167270, 
    msg=<optimized out>) at rpcsvc.c:695
#5  0x00007f8b43ae5aab in rpcsvc_notify (trans=0x7f8b30167270,
mydata=<optimized out>, 
    event=<optimized out>, data=<optimized out>) at rpcsvc.c:789
#6  0x00007f8b43ae79e3 in rpc_transport_notify (this=this at entry=0x7f8b30167270, 
    event=event at entry=RPC_TRANSPORT_MSG_RECEIVED,
data=data at entry=0x7f8b30160720) at rpc-transport.c:538
#7  0x00007f8b389163d6 in socket_event_poll_in (this=this at entry=0x7f8b30167270, 
    notify_handled=<optimized out>) at socket.c:2306
#8  0x00007f8b3891897c in socket_event_handler (fd=34, idx=33, gen=10,
data=0x7f8b30167270, poll_in=1, 
    poll_out=0, poll_err=0) at socket.c:2458
#9  0x00007f8b43d7d0f6 in event_dispatch_epoll_handler (event=0x7f8b37067e80,
event_pool=0x55d3ffe94fd0)
    at event-epoll.c:572
#10 event_dispatch_epoll_worker (data=0x55d3ffedb5f0) at event-epoll.c:648
#11 0x00007f8b42b81e25 in start_thread () from /lib64/libpthread.so.0
#12 0x00007f8b4244e34d in clone () from /lib64/libc.so.6


--- Additional comment from Niels de Vos on 2017-07-27 14:54:14 CEST ---

Two more upstream patches have been posted:

https://review.gluster.org/17897
- libglusterfs: the global_xlator should have valid cbks

https://review.gluster.org/17898
- nfs: use "/" as subdir for volume mounts


With these changes subdir mounting (and restricting access) works for me. The
additional test by deleting the subdir after mounting does not segfault anymore
either.


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1468291
[Bug 1468291] NFS Sub directory is getting mounted on solaris 10 even when
the permission is restricted in nfs.export-dir volume option
https://bugzilla.redhat.com/show_bug.cgi?id=1472773
[Bug 1472773] [GNFS] GNFS got crashed while mounting volume on solaris
client
https://bugzilla.redhat.com/show_bug.cgi?id=1473826
[Bug 1473826] GlusterFS 3.12.0 tracker
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