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Bug 1196552

Summary: virt-viewer --attach makes it crash
Product: Red Hat Enterprise Linux 7 Reporter: tingting zheng <tzheng>
Component: virt-viewerAssignee: Virt Viewer Maint <virt-viewer-maint>
Status: CLOSED ERRATA QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.1CC: dblechte, fidencio, juzhou, mzhan, pasik, pgrunt, rbalakri, xiaodwan
Target Milestone: rc   
Target Release: 7.2   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: virt-viewer-2.0-1.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-11-19 07:36:09 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1181288    
Bug Blocks:    

Description tingting zheng 2015-02-26 09:25:50 UTC 
Description of problem:
virt-viewer --attach option makes it crash 

Version-Release number of selected component (if applicable):
virt-viewer-0.6.0-12.el7.x86_64


How reproducible:
100%.

Steps to Reproduce:
1.Check virt-viewer manual,it says --attach option works for TCP/UNIX connection,from bug 999291#comment 18,it says --attach only has effect when using a UNIX socket connection.

# man virt-viewer
       -a, --attach
           Instead of making a direct TCP/UNIX socket connection to the remote display, ask libvirt to provide
           a pre-connected socket for the display. This avoids the need to authenticate with the remote display
           server directly. This option will only work when connecting to a guest that is running on the same
           host as the virt-viewer program. If attaching to the guest via libvirt fails, virt-viewer will
           automatically fallback to trying a regular direct TCP/UNIX socket connection.

2.Tried unix connnection by the below steps:
add auth_unix_rw="sasl" in the /etc/libvirt/libvirtd.conf

add sasl user
# saslpasswd2 -a libvirt test
(input your passwd)

Restart libvirtd server.
# service libvirtd restart

Prepare a running guest.
# virsh -c qemu+unix:///system list 
Please enter your authentication name: test
Please enter your password: 
 Id    Name                           State
----------------------------------------------------
 2     demo                           running

3.Test virt-viewer --attach option for UNIX connection:
3.1,virt-viewer to launch guest via UNIX connection without --attach.
# virt-viewer -c qemu+unix:///system demo --debug  -->No password needed,guest console will be launched successfully,and direct TCP connection shows in debug info.

(virt-viewer:21954): virt-viewer-DEBUG: fullscreen display 0: 0
(virt-viewer:21954): virt-viewer-DEBUG: connecting ...
(virt-viewer:21954): virt-viewer-DEBUG: Opening connection to libvirt with URI qemu+unix:///system
(virt-viewer:21954): virt-viewer-DEBUG: Add handle 8 1 0x26339e0
(virt-viewer:21954): virt-viewer-DEBUG: initial connect
(virt-viewer:21954): virt-viewer-DEBUG: notebook show status 0x2537180
(virt-viewer:21954): virt-viewer-DEBUG: virt_viewer_app_set_uuid_string: UUID changed to bf6d8713-b158-4bf2-beeb-eebb5cad1f89
(virt-viewer:21954): virt-viewer-DEBUG: No guest-specific fullscreen config, using fallback
(virt-viewer:21954): virt-viewer-DEBUG: notebook show status 0x2537180
(virt-viewer:21954): virt-viewer-DEBUG: Guest demo is running, determining display
(virt-viewer:21954): virt-viewer-DEBUG: Set connect info: (null),(null),(null),-1,(null),(null),(null),0
(virt-viewer:21954): virt-viewer-DEBUG: Guest demo has a spice display
(virt-viewer:21954): virt-viewer-DEBUG: Guest graphics address is 127.0.0.1:5900
(virt-viewer:21954): virt-viewer-DEBUG: Set connect info: localhost,127.0.0.1,5900,-1,unix,(null),(null),0
(virt-viewer:21954): virt-viewer-DEBUG: Error operation forbidden: read only access prevents virDomainOpenGraphics
(virt-viewer:21954): virt-viewer-DEBUG: After open connection callback fd=-1
(virt-viewer:21954): virt-viewer-DEBUG: Opening direct TCP connection to display at 127.0.0.1:5900:-1
(virt-viewer:21954): virt-viewer-DEBUG: New spice channel 0x265c030 SpiceMainChannel 0
(virt-viewer:21954): virt-viewer-DEBUG: notebook show status 0x2537180
(virt-viewer:21954): virt-viewer-DEBUG: Add timeout 0x265cd80 -1 0x7f324c85fa30 0x2636b00 1
(virt-viewer:21954): virt-viewer-DEBUG: main channel: opened
(virt-viewer:21954): virt-viewer-DEBUG: notebook show status 0x2537180
(virt-viewer:21954): virt-viewer-DEBUG: virt_viewer_app_set_uuid_string: UUID changed to bf6d8713-b158-4bf2-beeb-eebb5cad1f89

3.2 virt-viewer to launch guest via UNIX connection with --attach.
# virt-viewer -c qemu+unix:///system demo -a -->authtication box pop out,after input the user/password,virt-viewer coredump.

# virt-viewer -c qemu+unix:///system demo --attach --debug
(virt-viewer:21973): virt-viewer-DEBUG: fullscreen display 0: 0
(virt-viewer:21973): virt-viewer-DEBUG: connecting ...
(virt-viewer:21973): virt-viewer-DEBUG: Opening connection to libvirt with URI qemu+unix:///system
(virt-viewer:21973): virt-viewer-DEBUG: Add handle 8 1 0x276da40
(virt-viewer:21973): virt-viewer-DEBUG: Got libvirt credential request for 2 credential(s)
(virt-viewer:21973): virt-viewer-DEBUG: Got 'test' 4 2
(virt-viewer:21973): virt-viewer-DEBUG: Got 'redhat' 6 5
(virt-viewer:21973): virt-viewer-DEBUG: Return 0
(virt-viewer:21973): virt-viewer-DEBUG: initial connect
(virt-viewer:21973): virt-viewer-DEBUG: notebook show status 0x2671180
(virt-viewer:21973): virt-viewer-DEBUG: virt_viewer_app_set_uuid_string: UUID changed to bf6d8713-b158-4bf2-beeb-eebb5cad1f89
(virt-viewer:21973): virt-viewer-DEBUG: No guest-specific fullscreen config, using fallback
(virt-viewer:21973): virt-viewer-DEBUG: notebook show status 0x2671180
(virt-viewer:21973): virt-viewer-DEBUG: Guest demo is running, determining display
(virt-viewer:21973): virt-viewer-DEBUG: Set connect info: (null),(null),(null),-1,(null),(null),(null),0
(virt-viewer:21973): virt-viewer-DEBUG: Guest demo has a spice display
(virt-viewer:21973): virt-viewer-DEBUG: Guest graphics address is 127.0.0.1:5900
(virt-viewer:21973): virt-viewer-DEBUG: Set connect info: localhost,127.0.0.1,5900,-1,unix,(null),(null),0
(virt-viewer:21973): virt-viewer-DEBUG: Remove handle 1 8
Segmentation fault (core dumped)

(gdb) where
#0  virFileClose (fdptr=0x0, flags=flags@entry=VIR_FILE_CLOSE_PRESERVE_ERRNO) at util/virfile.c:80
#1  0x00007f222bcb6ff6 in virNetMessageFree (msg=msg@entry=0x27d0440) at rpc/virnetmessage.c:80
#2  0x00007f222bcad97a in virNetClientProgramCall (prog=prog@entry=0x2770a80, client=client@entry=0x2770600, 
    serial=serial@entry=11, proc=proc@entry=249, noutfds=noutfds@entry=1, outfds=outfds@entry=0x7fff41e84e30, 
    ninfds=ninfds@entry=0x0, infds=infds@entry=0x0, 
    args_filter=args_filter@entry=0x7f222bca8470 <xdr_remote_domain_open_graphics_args>, 
    args=args@entry=0x7fff41e84e40, ret_filter=ret_filter@entry=0x7f2228492700 <__GI_xdr_void>, 
    ret=ret@entry=0x0) at rpc/virnetclientprogram.c:398
#3  0x00007f222bc85482 in callFull (priv=priv@entry=0x276d980, flags=flags@entry=0, 
    fdin=fdin@entry=0x7fff41e84e30, fdinlen=fdinlen@entry=1, fdout=fdout@entry=0x0, fdoutlen=fdoutlen@entry=0x0, 
    proc_nr=proc_nr@entry=249, args_filter=0x7f222bca8470 <xdr_remote_domain_open_graphics_args>, 
    args=args@entry=0x7fff41e84e40 "\220m\204\002", ret_filter=0x7f2228492700 <__GI_xdr_void>, 
    ret=ret@entry=0x0, conn=<optimized out>) at remote/remote_driver.c:6698
#4  0x00007f222bc8845f in remoteDomainOpenGraphics (dom=0x2778290, idx=0, fd=<optimized out>, flags=1)
    at remote/remote_driver.c:6504
#5  0x00007f222bc6df84 in virDomainOpenGraphics (dom=0x2778290, idx=idx@entry=0, fd=20, flags=flags@entry=1)
    at libvirt.c:20300
#6  0x0000000000426d30 in virt_viewer_open_connection (self=<optimized out>, fd=0x7fff41e8501c)
    at virt-viewer.c:497
#7  0x000000000041389c in virt_viewer_app_default_activate (self=0x266f140 [VirtViewer], error=0x7fff41e851b8)
    at virt-viewer-app.c:1142
#8  0x000000000041536b in virt_viewer_app_activate (self=0x266f140 [VirtViewer], error=0x7fff41e851b8)
    at virt-viewer-app.c:1209
#9  0x00000000004271d2 in virt_viewer_initial_connect (app=0x266f140 [VirtViewer], error=0x7fff41e851b8)
    at virt-viewer.c:635
#10 0x0000000000426a70 in virt_viewer_connect (app=app@entry=0x266f140 [VirtViewer]) at virt-viewer.c:796
#11 0x0000000000426c8d in virt_viewer_start (app=0x266f140 [VirtViewer]) at virt-viewer.c:834
#12 0x0000000000414116 in virt_viewer_app_start (self=0x266f140 [VirtViewer]) at virt-viewer-app.c:1700
#13 0x000000000040fbc4 in main (argc=1, argv=0x7fff41e85518) at virt-viewer-main.c:113


Actual results:
As descritpion.

Expected results:
--attach option works well.

Additional info:
Comment 1 tingting zheng 2015-02-26 09:35:48 UTC 
Tested on rhel6.6 host,--attach option works well when using virt-viewer to launch guest via UNIX connection.
Comment 2 Pavel Grunt 2015-03-09 15:05:37 UTC 
fixed upstream
Comment 6 zhoujunqin 2015-06-23 06:53:37 UTC 
I can reproduce this issue with package:
virt-viewer-0.6.0-12.el7.x86_64

Then try to verify with new build:
virt-viewer-2.0-3.el7.x86_64

Steps to verify:
1. Tried unix connnection by the below steps:
add auth_unix_rw="sasl" in the /etc/libvirt/libvirtd.conf

add sasl user:
# saslpasswd2 -a libvirt fred
(input your passwd: such as redhat)

Restart libvirtd server:
# service libvirtd restart

Prepare a running guest:
# virsh -c qemu+unix:///system list
Please enter your authentication name: fred
Please enter your password: 
 Id    Name                           State
----------------------------------------------------
 2     rhel6.7-snap5                  running

2.Test virt-viewer --attach option for UNIX connection:

2.1,virt-viewer to launch guest via UNIX connection without --attach.
# virt-viewer  -c qemu+unix:///system rhel6.7-snap5  --debug
(virt-viewer:17673): virt-viewer-DEBUG: connecting ...
(virt-viewer:17673): virt-viewer-DEBUG: Opening connection to libvirt with URI qemu+unix:///system
(virt-viewer:17673): virt-viewer-DEBUG: Add handle 10 1 0x21d1c00
(virt-viewer:17673): virt-viewer-DEBUG: initial connect
(virt-viewer:17673): virt-viewer-DEBUG: notebook show status 0x21b6180
(virt-viewer:17673): virt-viewer-DEBUG: virt_viewer_app_set_uuid_string: UUID changed to 60866799-b8c9-44ea-a921-ed892a910b76
(virt-viewer:17673): virt-viewer-DEBUG: No guest-specific fullscreen config, using fallback
(virt-viewer:17673): virt-viewer-DEBUG: notebook show status 0x21b6180
(virt-viewer:17673): virt-viewer-DEBUG: Guest rhel6.7-snap5 is running, determining display
(virt-viewer:17673): virt-viewer-DEBUG: Set connect info: (null),(null),(null),-1,(null),(null),(null),0
(virt-viewer:17673): virt-viewer-DEBUG: Guest rhel6.7-snap5 has a spice display
(virt-viewer:17673): virt-viewer-DEBUG: Guest graphics address is 127.0.0.1:5900
(virt-viewer:17673): virt-viewer-DEBUG: Set connect info: localhost,127.0.0.1,5900,-1,unix,(null),(null),0
(virt-viewer:17673): virt-viewer-DEBUG: Error operation forbidden: read only access prevents virDomainOpenGraphicsFD
(virt-viewer:17673): virt-viewer-DEBUG: After open connection callback fd=-1
(virt-viewer:17673): virt-viewer-DEBUG: Opening direct TCP connection to display at 127.0.0.1:5900:-1
(virt-viewer:17673): virt-viewer-DEBUG: New spice channel 0x21fb000 SpiceMainChannel 0
(virt-viewer:17673): virt-viewer-DEBUG: notebook show status 0x21b6180
(virt-viewer:17673): virt-viewer-DEBUG: Add timeout 0x21fbac0 -1 0x7fe71942cfe0 0x2157360 1
(virt-viewer:17673): virt-viewer-DEBUG: main channel: opened


Result: No password needed, guest console will be launched successfully,and direct TCP connection shows in debug info.

2.2 virt-viewer to launch guest via UNIX connection with --attach.
# virt-viewer  -c qemu+unix:///system rhel6.7-snap5  -a

Result: Authentication box pop out, after input right Username/Password, guest console with be launched successfully, without any virt-viewer coredump.

So move this bug from ON_QA to VERIFIED.
Comment 8 errata-xmlrpc 2015-11-19 07:36:09 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2211.html