Bug 1185737

Summary: qemu-kvm hang when boot with usb-host and sandbox was enabled
Product: Red Hat Enterprise Linux 7 Reporter: mazhang <mazhang>
Component: qemu-kvmAssignee: Gerd Hoffmann <kraxel>
Status: CLOSED ERRATA QA Contact: Virtualization Bugs <virt-bugs>
Severity: high Docs Contact:
Priority: medium    
Version: 7.1CC: hhuang, juzhang, michen, mrezanin, rbalakri, virt-maint
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: qemu-kvm-1.5.3-92.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-11-19 04:58:02 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:
Attachments:
Description Flags
system calls none

Description mazhang 2015-01-26 08:12:01 UTC 
Description of problem:
qemu-kvm hang when boot with usb-host and sandbox was enabled

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

Host:
qemu-kvm-1.5.3-86.el7.x86_64
3.10.0-225.el7.x86_64

How reproducible:
always

Steps to Reproduce:
1.Start qemu-kvm with following command line:
/usr/libexec/qemu-kvm -M pc -monitor stdio -vnc :0 -sandbox on -usb -device usb-host,id=hostdev0
2.
3.

Actual results:
qemu-kvm hang.

[root@dhcp-11-16 ~]# ps ax |grep qemu
12383 pts/3    Zl+    0:00 [qemu-kvm] <defunct>
12402 pts/2    S+     0:00 grep --color=auto qemu


Expected results:
qemu-kvm works well.

Additional info:
qemu-kvm-rhev-2.1.2-20.el7.x86_64 can't hit this problem.
Comment 1 mazhang 2015-01-26 08:13:21 UTC 
Created attachment 984125 [details]
system calls
Comment 3 mazhang 2015-01-26 08:46:15 UTC 
qemu-kvm-1.5.3-60.el7.x86_64       fail
qemu-kvm-rhev-2.1.2-22.el7.x86_64  pass
Comment 4 juzhang 2015-01-26 09:08:57 UTC 
According to comment3, this bz is not a regression.
Comment 5 mazhang 2015-01-27 06:04:46 UTC 
Following command line also hit qemu-kvm hang.
qemu-kvm-1.5.3-60.el7.x86_64

Start qemu-kvm with sandbos enabled, then query usbhost in hmp.
/usr/libexec/qemu-kvm -M pc -monitor stdio -vnc :0 -sandbox on
(qemu) info usbhost

[root@dhcp-8-204 ~]# ps ax |grep qemu
16703 pts/0    Zl+    0:03 [qemu-kvm] <defunct>
16744 pts/1    S+     0:00 grep --color=auto qemu
Comment 7 Gerd Hoffmann 2015-04-30 10:32:54 UTC 
patch posted.
Comment 8 Miroslav Rezanina 2015-06-16 18:01:15 UTC 
Fix included in qemu-kvm-1.5.3-92.el7
Comment 10 mazhang 2015-07-03 02:07:14 UTC 
Reproduce this bug on qemu-kvm-1.5.3-86.el7

Host:
qemu-kvm-1.5.3-86.el7
3.10.0-287.el7.x86_64

Steps:
1. Start qemu-kvm with sandbos enabled, then query usbhost in hmp.
# /usr/libexec/qemu-kvm -M pc -monitor stdio -vnc :0 -sandbox on -usb -device usb-host,id=hostdev0

Result:
qemu-kvm hang.

# ps ax |grep qemu
 1123 pts/0    Zl+    0:00 [qemu-kvm] <defunct>
 1129 pts/1    S+     0:00 grep --color=auto qemu


Verify this bug on qemu-kvm-1.5.3-92.el7

# /usr/libexec/qemu-kvm -M pc -monitor stdio -vnc :0 -sandbox on -usb -device usb-host,id=hostdev0
QEMU 1.5.3 monitor - type 'help' for more information
(qemu) info usbhost 
  Bus 1, Addr 3, Port 1.1, Speed 12 Mb/s
    Class 00: USB device 0624:0013, AVOCENT K/M         
  Bus 1, Addr 4, Port 1.2, Speed 12 Mb/s
    Class 00: USB device 0624:0815, AVO VMC-USB MPUIQ
(qemu) info status 
VM status: running

# ps ax |grep qemu
 1186 pts/0    Sl+    0:13 /usr/libexec/qemu-kvm -M pc -monitor stdio -vnc :0 -sandbox on -usb -device usb-host,id=hostdev0
 1195 pts/1    S+     0:00 grep --color=auto qemu

qemu-kvm works well, this bug has been fixed.
Comment 12 errata-xmlrpc 2015-11-19 04:58:02 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-2015-2213.html