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Bug 828640 - valgrind defects some use-after-free errors - virsh console
Summary: valgrind defects some use-after-free errors - virsh console
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: libvirt
Version: 6.3
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Osier Yang
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-06-05 05:47 UTC by dyuan
Modified: 2015-09-28 02:31 UTC (History)
8 users (show)

Fixed In Version: libvirt-0.10.0-0rc1.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-02-21 07:16:20 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
leak-full (21.24 KB, application/octet-stream)
2012-08-24 04:46 UTC, Luwen Su 		no flags Details
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2013:0276 0 normal SHIPPED_LIVE Moderate: libvirt security, bug fix, and enhancement update 2013-02-20 21:18:26 UTC

Description dyuan 2012-06-05 05:47:12 UTC 
Description of problem:
valgrind error for change-media and console for now, if there are more commands involved in this error, I 'll track them in this bug.

Version-Release number of selected component (if applicable):
libvirt-0.9.10-21.el6

How reproducible:
always

Steps to Reproduce:
1. # valgrind -v --leak-check=full virsh console rhel63
snip...
==15626== 1 errors in context 1 of 11:
==15626== Invalid read of size 4
==15626==    at 0x30336CEA9F: virStreamFree (libvirt.c:15419)
==15626==    by 0x40A671: vshRunConsole (console.c:394)
==15626==    by 0x4167DE: cmdRunConsole (virsh.c:865)
==15626==    by 0x416B9E: cmdConsole (virsh.c:899)
==15626==    by 0x413CB4: vshCommandRun (virsh.c:18669)
==15626==    by 0x423973: main (virsh.c:20261)
==15626==  Address 0x4ea71b0 is 0 bytes inside a block of size 40 free'd
==15626==    at 0x4A0595D: free (vg_replace_malloc.c:366)
==15626==    by 0x303364F158: virFree (memory.c:310)
==15626==    by 0x30336BA64B: virUnrefStream (datatypes.c:1109)
==15626==    by 0x30336CEABF: virStreamFree (libvirt.c:15427)
==15626==    by 0x40A850: virConsoleShutdown (console.c:103)
==15626==    by 0x303364860E: virEventPollRunOnce (event_poll.c:490)
==15626==    by 0x30336473B6: virEventRunDefaultImpl (event.c:247)
==15626==    by 0x41C231: vshEventLoop (virsh.c:19440)
==15626==    by 0x3033658D78: virThreadHelper (threads-pthread.c:161)
==15626==    by 0x301A607850: start_thread (in /lib64/libpthread-2.12.so)
==15626==    by 0x3019EE767C: clone (in /lib64/libc-2.12.so)

2. # valgrind -v virsh change-media 3 hdc /var/lib/libvirt/images/foo2.img
==16217== 1 errors in context 1 of 12:
==16217== Invalid read of size 1
==16217==    at 0x4A07804: __GI_strlen (mc_replace_strmem.c:284)
==16217==    by 0x3019F167F6: xdr_string (in /lib64/libc-2.12.so)
==16217==    by 0x3033709E8D: xdr_remote_nonnull_string (remote_protocol.c:31)
==16217==    by 0x303370E5CB: xdr_remote_domain_update_device_flags_args (remote_protocol.c:2028)
==16217==    by 0x30337197D1: virNetMessageEncodePayload (virnetmessage.c:341)
==16217==    by 0x30337135E1: virNetClientProgramCall (virnetclientprogram.c:327)
==16217==    by 0x30336F1EFD: callWithFD (remote_driver.c:4586)
==16217==    by 0x30336F1F7B: call (remote_driver.c:4607)
==16217==    by 0x30336F42F2: remoteDomainUpdateDeviceFlags (remote_client_bodies.h:2865)
==16217==    by 0x30336D46E5: virDomainUpdateDeviceFlags (libvirt.c:9457)
==16217==    by 0x41AEE8: cmdChangeMedia (virsh.c:15249)
==16217==    by 0x413CB4: vshCommandRun (virsh.c:18669)
==16217==  Address 0x4ec5e25 is 0 bytes after a block of size 293 alloc'd
==16217==    at 0x4A04A28: calloc (vg_replace_malloc.c:467)
==16217==    by 0x303364F1DB: virAllocN (memory.c:129)
==16217==    by 0x41A844: vshPrepareDiskXML (virsh.c:15043)
==16217==    by 0x41AECC: cmdChangeMedia (virsh.c:15246)
==16217==    by 0x413CB4: vshCommandRun (virsh.c:18669)
==16217==    by 0x423973: main (virsh.c:20261)

Actual results:
defect errors.

Expected results:
no error.

Additional info:
Comment 1 Dave Allan 2012-06-05 12:20:50 UTC 
(In reply to comment #0)
> Description of problem:
> valgrind error for change-media and console for now, if there are more
> commands involved in this error, I 'll track them in this bug.

It's actually easier for us if you file separate BZs for each.  Thanks. -Davea
Comment 2 dyuan 2012-06-06 02:39:19 UTC 
That's okay for us.:-)
Track the issue for change-media in bug 829107.
Comment 3 Osier Yang 2012-08-17 13:57:58 UTC 
Should be fixed by commit e3b8808ba
Comment 5 Luwen Su 2012-08-24 04:45:39 UTC 
The problem in comment0 step1 is fixed , but i found someone doesn't appear before.I'm not sure whether is a new issue.
Something like below
 Use of uninitialised value of size 8
==9161==    at 0x39D9E04091: numa_node_size64 (in /usr/lib64/libnuma.so.1)
==9161==    by 0x39D9E05A48: ??? (in /usr/lib64/libnuma.so.1)
==9161==    by 0x39C2E0E534: _dl_init (in /lib64/ld-2.12.so)
==9161==    by 0x39C2E00B39: ??? (in /lib64/ld-2.12.so)
==9161==    by 0x2: ???
==9161==    by 0x7FF00076E: ???
==9161==    by 0x7FF000774: ???
==9161==    by 0x7FF00077C: ???

See the attachenment for full details
Comment 6 Luwen Su 2012-08-24 04:46:50 UTC 
Created attachment 606752 [details]
leak-full
Comment 7 Alex Jia 2012-08-24 06:44:59 UTC 
(In reply to comment #6)
> Created attachment 606752 [details]
> leak-full

These leaks are irrelevant with libvirt, so you may close this bug IMHO.
Comment 8 Luwen Su 2012-08-24 07:18:24 UTC 


(In reply to comment #7)
> (In reply to comment #6)
> > Created attachment 606752 [details]
> > leak-full
> 
> These leaks are irrelevant with libvirt, so you may close this bug IMHO.

thanks

Accroding comment 5 ,7 . verify this bug
Comment 9 errata-xmlrpc 2013-02-21 07:16:20 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.

http://rhn.redhat.com/errata/RHSA-2013-0276.html
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