[Bugs] [Bug 1793378] New: dht_hash_compute() crashes when it receives a zero length name

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1793378

            Bug ID: 1793378
           Summary: dht_hash_compute() crashes when it receives a zero
                    length name
           Product: GlusterFS
           Version: mainline
            Status: NEW
         Component: core
          Assignee: bugs at gluster.org
          Reporter: ykaul at redhat.com
                CC: bugs at gluster.org
  Target Milestone: ---
    Classification: Community



Description of problem:

>From https://build.gluster.org/job/centos7-regression/9167/console :

Thread 1 (Thread 0x7f8816b9f700 (LWP 28623)):
#0  0x00007f882324e641 in __strlen_sse2_pminub () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007f8815b86c14 in dht_hash_compute (this=0x7f8810017a00, type=0,
name=0x0, hash_p=0x7f8816b9d30c) at
/home/jenkins/root/workspace/centos7-regression/xlators/cluster/dht/src/dht-hashfn.c:81
        rsync_friendly_name = 0x0
        priv = 0x7f881004eb50
        len = 0
        munged = 0
        __FUNCTION__ = "dht_hash_compute"
#2  0x00007f8815b777b6 in dht_selfheal_layout_alloc_start (this=0x7f8810017a00,
loc=0x7f87f80195a8, layout=0x7f880802d6c0) at
/home/jenkins/root/workspace/centos7-regression/xlators/cluster/dht/src/dht-selfheal.c:1566
        start = 0
        hashval = 0
        ret = 0
        str = 0x0
        conf = 0x7f881004eb50
        buf = '\000' <repeats 36 times>
#3  0x00007f8815b7865d in dht_selfheal_layout_new_directory
(frame=0x7f87f800f408, loc=0x7f87f80195a8, layout=0x7f880802d6c0) at
/home/jenkins/root/workspace/centos7-regression/xlators/cluster/dht/src/dht-selfheal.c:1921
        this = 0x7f8810017a00
        chunk = 839516.67220484756
        i = 1
        start = 0
        bricks_to_use = 2
        err = -1
        start_subvol = 0
        curr_size = 2558
        range_size = 32648
        total_size = 5116
        real_i = 32648
        priv = 0x7f881004eb50
        weight_by_size = true
        bricks_used = 2
        __PRETTY_FUNCTION__ = "dht_selfheal_layout_new_directory"
        __FUNCTION__ = "dht_selfheal_layout_new_directory"



Might be related to the change I've made via
https://review.gluster.org/#/c/glusterfs/+/23842/ ?

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