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Bug 785668 - aug-defnode: daemon crash
Summary: aug-defnode: daemon crash
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: libguestfs
Version: 6.3
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: beta
: ---
Assignee: Richard W.M. Jones
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On: libguestfs_rebase6.3
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-01-30 09:25 UTC by Jinxin Zheng
Modified: 2012-06-20 07:00 UTC (History)
4 users (show)

Fixed In Version: libguestfs-1.16.2-1.el6
Doc Type: Bug Fix
Doc Text:
No Documentation needed.
Clone Of:
Environment:
Last Closed: 2012-06-20 07:00:19 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
crash debug log (41.64 KB, text/plain)
2012-01-30 09:25 UTC, Jinxin Zheng 		no flags Details
verify log (libguestfs-1.16.2-1) (71.87 KB, text/plain)
2012-02-01 06:21 UTC, Qixiang Wan 		no flags Details
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2012:0774 0 normal SHIPPED_LIVE Low: libguestfs security, bug fix, and enhancement update 2012-06-19 19:29:50 UTC

Description Jinxin Zheng 2012-01-30 09:25:02 UTC 
Created attachment 558294 [details]
crash debug log

Description of problem:
Daemon crashes when executing aug-defnode.

Version-Release number of selected component (if applicable):
libguestfs-1.16.1-1.el6

How reproducible:
100%

Steps to Reproduce:
$ guestfish -a rhel.img <<EOF                      
run
mount /dev/sda1 /
aug-init / 0
aug-defnode node /file/etc/passwd/root 0
EOF

Actual results:
Daemon crashes.

Expected results:
No crash.
Comment 2 Richard W.M. Jones 2012-01-30 10:30:35 UTC 
Simple reproducer:

guestfish --ro -i -a linux.img -v <<EOF
aug-init / 0
aug-defnode node /file/etc/passwd/root 0
EOF

With debugging enabled (-v) it seems to be a segfault
in the daemon:

><fs> aug-defnode node /file/etc/passwd/root 0
libguestfs: send_to_daemon: 88 bytes: 00 00 00 54 | 20 00 f5 f5 | 00 00 00 04 | 00 00 00 12 | 00 00 00 00 | ...
guestfsd: main_loop: proc 16 (aug_init) took 3.76 seconds
guestfsd: main_loop: new request, len 0x54
[   12.422138] guestfsd[107]: segfault at 100000019 ip 0000003a2467cf41 sp 00007fff45462900 error 4 in libc-2.14.90.so[3a24600000+1ab000]
/init: line 147:   107 Segmentation fault      $vg guestfsd
Rebooting.

I enabled valgrind in the daemon and it says:

==106== Invalid free() / delete / delete[]
==106==    at 0x505962E: free (vg_replace_malloc.c:366)
==106==    by 0x41AA66: aug_defnode_stub (stubs.c:552)
==106==    by 0x42C72E: dispatch_incoming_message (stubs.c:9920)
==106==    by 0x417ED3: main_loop (proto.c:193)
==106==    by 0x403DC6: main (guestfsd.c:286)
==106==  Address 0x651f40 is 0 bytes inside data symbol "r.14855"
Comment 3 Richard W.M. Jones 2012-01-30 10:49:16 UTC 
Patch posted upstream:

https://www.redhat.com/archives/libguestfs/2012-January/msg00291.html
Comment 4 Richard W.M. Jones 2012-01-30 11:15:34 UTC 
Patch pushed.  I'll make sure this goes into
libguestfs 1.16.2 and from there into RHEL 6.3
via the rebase.
Comment 10 Richard W.M. Jones 2012-01-31 14:32:35 UTC 
Fix included in 1.16.2.
Comment 12 Qixiang Wan 2012-02-01 06:21:31 UTC 
Created attachment 558756 [details]
verify log (libguestfs-1.16.2-1)

Verified with libguestfs-1.16.2-1.el6. Log is attached.
Comment 13 Richard W.M. Jones 2012-04-26 13:35:45 UTC 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
No Documentation needed.
Comment 15 errata-xmlrpc 2012-06-20 07:00:19 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-2012-0774.html
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