[Bugs] [Bug 1378089] New: Ganesha crashes with segfault while accessing files from Windows client.

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1378089

            Bug ID: 1378089
           Summary: Ganesha crashes with segfault while accessing files
                    from Windows client.
           Product: GlusterFS
           Version: 3.8
         Component: ganesha-nfs
          Severity: urgent
          Assignee: bugs at gluster.org
          Reporter: sraj at redhat.com
                CC: bugs at gluster.org, jthottan at redhat.com,
                    kkeithle at redhat.com, ndevos at redhat.com,
                    skoduri at redhat.com, storage-qa-internal at redhat.com



Description of problem:

Ganesha crashes with segfault while accessing files from Windows client.

Version-Release number of selected component (if applicable):

[root at dhcp43-116 /]# rpm -qa|grep ganesha
glusterfs-ganesha-3.8.3-0.6.git7956718.el7.centos.x86_64
nfs-ganesha-gluster-2.4-0.rc4.el7.centos.x86_64
nfs-ganesha-debuginfo-2.4-0.rc4.el7.centos.x86_64
nfs-ganesha-2.4-0.rc4.el7.centos.x86_64

How reproducible:

Consistent

Steps to Reproduce:
1.Create a nfs-ganesha cluster.
2.Create a volume and enable ganesha on it.
3.Mounted the volume on linux client and created 10000 (100KB) files.
4.Mount the volume on Windows client and try accessing the files inside nfs
share.
5.Observe that ganesha crashes with seg fault error with below bt:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f3022ec4700 (LWP 10382)]
0x00007f309d6b08fd in glusterfs_reopen2 (obj_hdl=0x7f2fd0007498, state=0x0, 
    openflags=1)
    at
/usr/src/debug/nfs-ganesha-2.4-rc4-0.1.1-Source/FSAL/FSAL_GLUSTER/handle.c:1953
1953        old_openflags = my_share_fd->openflags;
(gdb) bt
#0  0x00007f309d6b08fd in glusterfs_reopen2 (obj_hdl=0x7f2fd0007498, state=0x0, 
    openflags=1)
    at
/usr/src/debug/nfs-ganesha-2.4-rc4-0.1.1-Source/FSAL/FSAL_GLUSTER/handle.c:1953
#1  0x000000000053217e in mdcache_reopen2 (obj_hdl=0x7f2fd0002ae8, state=0x0, 
    openflags=1)
    at
/usr/src/debug/nfs-ganesha-2.4-rc4-0.1.1-Source/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_file.c:779
#2  0x000000000043329c in fsal_reopen2 (obj=0x7f2fd0002ae8, state=0x0, 
    openflags=1, check_permission=true)
    at /usr/src/debug/nfs-ganesha-2.4-rc4-0.1.1-Source/FSAL/fsal_helper.c:1842
#3  0x00000000004b9e5e in state_nlm_share2 (obj=0x7f2fd0002ae8, share_access=1, 
    share_deny=0, owner=0x7f2f98009560, state=0x0, reclaim=false,
unshare=false)
    at /usr/src/debug/nfs-ganesha-2.4-rc4-0.1.1-Source/SAL/state_share.c:805
#4  0x00000000004ba6eb in state_nlm_share (obj=0x7f2fd0002ae8, share_access=1, 
    share_deny=0, owner=0x7f2f98009560, state=0x0, reclaim=false)
    at /usr/src/debug/nfs-ganesha-2.4-rc4-0.1.1-Source/SAL/state_share.c:894
#5  0x000000000049547d in nlm4_Share (args=0x7f2f7c006128, req=0x7f2f7c005f68, 
    res=0x7f2f98007dd0)
    at
/usr/src/debug/nfs-ganesha-2.4-rc4-0.1.1-Source/Protocols/NLM/nlm_Share.c:12---Type
<return> to continue, or q <return> to quit---
2
#6  0x000000000044ad6b in nfs_rpc_execute (reqdata=0x7f2f7c005f40)
    at
/usr/src/debug/nfs-ganesha-2.4-rc4-0.1.1-Source/MainNFSD/nfs_worker_thread.c:1281
#7  0x000000000044b625 in worker_run (ctx=0x217b9e0)
    at
/usr/src/debug/nfs-ganesha-2.4-rc4-0.1.1-Source/MainNFSD/nfs_worker_thread.c:1548
#8  0x000000000050079f in fridgethr_start_routine (arg=0x217b9e0)
    at /usr/src/debug/nfs-ganesha-2.4-rc4-0.1.1-Source/support/fridgethr.c:550
#9  0x00007f30a002cdc5 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f309f6ec1cd in clone () from /lib64/libc.so.6

Actual results:

Ganesha crashes with segfault while accessing files from Windows client.

Expected results:

There should not be any crash

Additional info:

Core file will be attached.

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