Description of problem:
glusterfs client crashed while doing getxattr call (the client crashed immedietly after mounting). nfs server and glustershd had crashed too. Replicate volume was just created (2 replica), started and enabled quota on the volume, then mounted it.

This is the backtrace of the core generated.


Core was generated by `/usr/local/sbin/glusterfs --volfile-id=mirror --volfile-server=hyperspace /mnt/'.
Program terminated with signal 11, Segmentation fault.
#0  __strlen_sse42 () at ../sysdeps/x86_64/multiarch/strlen-sse4.S:32
32	../sysdeps/x86_64/multiarch/strlen-sse4.S: No such file or directory.
	in ../sysdeps/x86_64/multiarch/strlen-sse4.S
(gdb) bt
#0  __strlen_sse42 () at ../sysdeps/x86_64/multiarch/strlen-sse4.S:32
#1  0x00007f30e28c23b7 in gf_strdup (src=0x0) at ../../../../../libglusterfs/src/mem-pool.h:119
#2  0x00007f30e28dd752 in client3_1_getxattr (frame=0x7f30e56c006c, this=0x1b37fd0, data=0x7fff345ab800)
    at ../../../../../xlators/protocol/client/src/client3_1-fops.c:4641
#3  0x00007f30e28bc962 in client_getxattr (frame=0x7f30e56c006c, this=0x1b37fd0, loc=0x7f30dff049f0, name=0x0, xdata=0x0)
    at ../../../../../xlators/protocol/client/src/client.c:1452
#4  0x00007f30e2666172 in afr_sh_metadata_sync_prepare (frame=0x7f30e54b784c, this=0x1b3b840)
    at ../../../../../xlators/cluster/afr/src/afr-self-heal-metadata.c:419
#5  0x00007f30e2666817 in afr_sh_metadata_fix (frame=0x7f30e54b784c, this=0x1b3b840, op_ret=0, op_errno=0)
    at ../../../../../xlators/cluster/afr/src/afr-self-heal-metadata.c:522
#6  0x00007f30e2660d46 in afr_sh_common_lookup_cbk (frame=0x7f30e54b784c, cookie=0x1, this=0x1b3b840, op_ret=0, op_errno=0, 
    inode=0x7f30de97504c, buf=0x7fff345abc90, xattr=0x7f30e532c82c, postparent=0x7fff345abc20)
    at ../../../../../xlators/cluster/afr/src/afr-self-heal-common.c:1311
#7  0x00007f30e28d3422 in client3_1_lookup_cbk (req=0x7f30df38fa80, iov=0x7f30df38fac0, count=1, myframe=0x7f30e56bffc0)
    at ../../../../../xlators/protocol/client/src/client3_1-fops.c:2636
#8  0x00007f30e71f5c91 in rpc_clnt_handle_reply (clnt=0x1b7e310, pollin=0x7f30d80017d0) at ../../../../rpc/rpc-lib/src/rpc-clnt.c:788
#9  0x00007f30e71f6009 in rpc_clnt_notify (trans=0x1b8dea0, mydata=0x1b7e340, event=RPC_TRANSPORT_MSG_RECEIVED, data=0x7f30d80017d0)
    at ../../../../rpc/rpc-lib/src/rpc-clnt.c:907
#10 0x00007f30e71f2021 in rpc_transport_notify (this=0x1b8dea0, event=RPC_TRANSPORT_MSG_RECEIVED, data=0x7f30d80017d0)
    at ../../../../rpc/rpc-lib/src/rpc-transport.c:489
#11 0x00007f30e350f3a5 in socket_event_poll_in (this=0x1b8dea0) at ../../../../../rpc/rpc-transport/socket/src/socket.c:1677
#12 0x00007f30e350f919 in socket_event_handler (fd=15, idx=6, data=0x1b8dea0, poll_in=1, poll_out=0, poll_err=0)
    at ../../../../../rpc/rpc-transport/socket/src/socket.c:1792
#13 0x00007f30e744ccf1 in event_dispatch_epoll_handler (event_pool=0x1b1fcd0, events=0x1b2df00, i=0) at ../../../libglusterfs/src/event.c:785
#14 0x00007f30e744cf0b in event_dispatch_epoll (event_pool=0x1b1fcd0) at ../../../libglusterfs/src/event.c:847
#15 0x00007f30e744d27d in event_dispatch (event_pool=0x1b1fcd0) at ../../../libglusterfs/src/event.c:947
#16 0x0000000000408858 in main (argc=4, argv=0x7fff345ac1f8) at ../../../glusterfsd/src/glusterfsd.c:1674
(gdb) f 1
#1  0x00007f30e28c23b7 in gf_strdup (src=0x0) at ../../../../../libglusterfs/src/mem-pool.h:119
119	        len = strlen (src) + 1;
(gdb) p src
$1 = 0x0
(gdb) f 2
#2  0x00007f30e28dd752 in client3_1_getxattr (frame=0x7f30e56c006c, this=0x1b37fd0, data=0x7fff345ab800)
    at ../../../../../xlators/protocol/client/src/client3_1-fops.c:4641
4641	        local->name = gf_strdup (args->name);
(gdb) p args->name
$2 = 0x0
(gdb) l
4636	                op_errno = ENOMEM;
4637	                goto unwind;
4638	        }
4639	
4640	        loc_copy (&local->loc, args->loc);
4641	        local->name = gf_strdup (args->name);
4642	        frame->local = local;
4643	
4644	        rsp_iobref = iobref_new ();
4645	        if (rsp_iobref == NULL) {
(gdb) l -
4626	        }
4627	        args = data;
4628	
4629	        if (!(args->loc && args->loc->inode)) {
4630	                op_errno = EINVAL;
4631	                goto unwind;
4632	        }
4633	
4634	        local = mem_get0 (this->local_pool);
4635	        if (!local) {
(gdb)  up
#2  0x00007f30e28dd752 in client3_1_getxattr (frame=0x7f30e56c006c, this=0x1b37fd0, data=0x7fff345ab800)
    at ../../../../../xlators/protocol/client/src/client3_1-fops.c:4641
4641	        local->name = gf_strdup (args->name);
(gdb) up
#3  0x00007f30e28bc962 in client_getxattr (frame=0x7f30e56c006c, this=0x1b37fd0, loc=0x7f30dff049f0, name=0x0, xdata=0x0)
    at ../../../../../xlators/protocol/client/src/client.c:1452
1452	                ret = proc->fn (frame, this, &args);
(gdb) l
1447	                        "rpc procedure not found for %s",
1448	                        gf_fop_list[GF_FOP_GETXATTR]);
1449	                goto out;
1450	        }
1451	        if (proc->fn)
1452	                ret = proc->fn (frame, this, &args);
1453	out:
1454	        if (ret)
1455	                STACK_UNWIND_STRICT (getxattr, frame, -1, ENOTCONN, NULL, NULL);
1456	
(gdb) p name
$3 = 0x0
(gdb) up
#4  0x00007f30e2666172 in afr_sh_metadata_sync_prepare (frame=0x7f30e54b784c, this=0x1b3b840)
    at ../../../../../xlators/cluster/afr/src/afr-self-heal-metadata.c:419
419	        STACK_WIND (frame, afr_sh_metadata_getxattr_cbk,
(gdb) l
414	        gf_log (this->name, GF_LOG_TRACE,
415	                "syncing metadata of %s from subvolume %s to %d active sinks",
416	                local->loc.path, priv->children[source]->name,
417	                sh->active_sinks);
418	
419	        STACK_WIND (frame, afr_sh_metadata_getxattr_cbk,
420	                    priv->children[source],
421	                    priv->children[source]->fops->getxattr,
422	                    &local->loc, NULL, NULL);
423	
(gdb) 


Since name can be NULL in the getxattr calls, it has to be checked before doing strdup.



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


How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:

ame, reopening the fds
[2012-05-17 13:02:00.740348] I [afr-common.c:3623:afr_notify] 0-mirror-replicate-2: Subvolume 'mirror-client-4' came back up; going online.
[2012-05-17 13:02:00.740425] I [client-handshake.c:453:client_set_lk_version_cbk] 0-mirror-client-4: Server lk version = 1
[2012-05-17 13:02:00.740503] I [client-handshake.c:1425:client_setvolume_cbk] 0-mirror-client-5: Connected to 127.0.1.1:24023, attached to remote volume '/mnt/sda8/export5'.
[2012-05-17 13:02:00.740538] I [client-handshake.c:1437:client_setvolume_cbk] 0-mirror-client-5: Server and Client lk-version numbers are not same, reopening the fds
[2012-05-17 13:02:00.749775] I [fuse-bridge.c:4192:fuse_graph_setup] 0-fuse: switched to graph 0
[2012-05-17 13:02:00.749935] I [client-handshake.c:453:client_set_lk_version_cbk] 0-mirror-client-5: Server lk version = 1
[2012-05-17 13:02:00.750042] I [fuse-bridge.c:3376:fuse_init] 0-glusterfs-fuse: FUSE inited with protocol versions: glusterfs 7.13 kernel 7.16
[2012-05-17 13:02:00.751047] I [afr-common.c:1965:afr_set_root_inode_on_first_lookup] 0-mirror-replicate-0: added root inode
[2012-05-17 13:02:00.751807] I [afr-common.c:1965:afr_set_root_inode_on_first_lookup] 0-mirror-replicate-1: added root inode
[2012-05-17 13:02:00.752141] I [afr-common.c:1965:afr_set_root_inode_on_first_lookup] 0-mirror-replicate-2: added root inode
[2012-05-17 13:02:00.752209] I [afr-common.c:1341:afr_launch_self_heal] 0-mirror-replicate-2: background  meta-data self-heal triggered. path: /, reason: lookup detected pending operations
pending frames:
frame : type(1) op(NULL)
frame : type(1) op(NULL)
frame : type(1) op(NULL)

patchset: git://git.gluster.com/glusterfs.git
signal received: 11
time of crash: 2012-05-17 13:02:00
configuration details:
argp 1
backtrace 1
dlfcn 1
fdatasync 1
libpthread 1
llistxattr 1
setfsid 1
spinlock 1
epoll.h 1
xattr.h 1
st_atim.tv_nsec 1
package-string: glusterfs 3git
/lib/x86_64-linux-gnu/libc.so.6(+0x33d80)[0x7f30e66bbd80]
/lib/x86_64-linux-gnu/libc.so.6(+0x12f49f)[0x7f30e67b749f]
/usr/local/lib/glusterfs/3git/xlator/protocol/client.so(+0x153b7)[0x7f30e28c23b7]
/usr/local/lib/glusterfs/3git/xlator/protocol/client.so(client3_1_getxattr+0x173)[0x7f30e28dd752]
/usr/local/lib/glusterfs/3git/xlator/protocol/client.so(client_getxattr+0x16f)[0x7f30e28bc962]
/usr/local/lib/glusterfs/3git/xlator/cluster/replicate.so(afr_sh_metadata_sync_prepare+0x3df)[0x7f30e2666172]
/usr/local/lib/glusterfs/3git/xlator/cluster/replicate.so(afr_sh_metadata_fix+0x68d)[0x7f30e2666817]
/usr/local/lib/glusterfs/3git/xlator/cluster/replicate.so(+0x3fd46)[0x7f30e2660d46]
:



 gluster volume info
 
Volume Name: mirror
Type: Distributed-Replicate
Volume ID: 6ff5ec4a-7781-48ec-a9bb-b34a547ad682
Status: Started
Number of Bricks: 3 x 2 = 6
Transport-type: tcp
Bricks:
Brick1: hyperspace:/mnt/sda7/export3
Brick2: hyperspace:/mnt/sda8/export3
Brick3: hyperspace:/mnt/sda7/export4
Brick4: hyperspace:/mnt/sda8/export4
Brick5: hyperspace:/mnt/sda7/export5
Brick6: hyperspace:/mnt/sda8/export5
Options Reconfigured:
features.limit-usage: /:250GB
features.quota: on