[Bugs] [Bug 1348935] New: Buffer overflow when attempting to create filesystem using libgfapi as driver on OpenStack

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1348935

            Bug ID: 1348935
           Summary: Buffer overflow when attempting to create filesystem
                    using libgfapi as driver on OpenStack
           Product: GlusterFS
           Version: 3.8.0
         Component: libgfapi
          Severity: high
          Assignee: bugs at gluster.org
          Reporter: rhbugzilla at ajaton.net
        QA Contact: sdharane at redhat.com
                CC: bugs at gluster.org



Created attachment 1170681
  --> https://bugzilla.redhat.com/attachment.cgi?id=1170681&action=edit
libvirtd log showing the backtrace and memory map

Description of problem:

Having GlusterFS to provide OpenStack Cinder volume storage using libgfapi
causes buffer overflow when trying to create a filesystem to attached volume.
This results qemu-kvm process for the instance to be terminated.

Version-Release number of selected component (if applicable):
* GlusterFS 3.8.0 on all the involved servers
* CentOS 7.1
* libvirt-daemon-1.2.8-16.el7_1.5.x86_64
* qemu-kvm-1.5.3-86.el7_1.8.x86_64

How reproducible:
Tested in three different environments and all fail similarly.

Steps to Reproduce:
1. deploy an instance
2. attach volume (of type glusterfs)
3. attempt mkfs.ext4 /dev/vdb1

Actual results:
[2016-06-22 09:15:09.350992] E [glfs-fops.c:806:glfs_io_async_cbk]
(-->/usr/lib64/glusterfs/3.8.0/xlator/debug/io-stats.so(+0x11e12)
[0x7eff84cb8e12] -->/lib64/libgfapi.so.0(+0xbe7d) [0x7f0000ce2e7d]
-->/lib64/libgfapi.so.0(+0xbd96) [0x7f0000ce2d96] ) 0-gfapi: invalid argument:
iovec [Invalid argument]
*** buffer overflow detected ***: /usr/libexec/qemu-kvm terminated

Expected results:
* filesystem to be created without crashing the instance

Additional info:
There was no such issue with 3.7.11 but we upgraded due to memory leak issues
with libgfapi.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.