Bug 961812

Summary:	Segfault in inspect-fs.c in mountable code
Product:	[Community] Virtualization Tools	Reporter:	Richard W.M. Jones <rjones>
Component:	libguestfs	Assignee:	Richard W.M. Jones <rjones>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	dyasny, mbooth
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-05-10 13:34:51 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:

Description Richard W.M. Jones 2013-05-10 13:20:51 UTC

Description of problem:

$ guestfish --ro -a /tmp/f18x64.vhdx -i

Segfaults with the following stack trace:

libguestfs: error: internal_parse_mountable: internal_parse_mountable_stub: /dev/fedora/root: No such file or directory

Program received signal SIGSEGV, Segmentation fault.
guestfs___check_for_filesystem_on (g=g@entry=0x55555584c620, 
    mountable=0x555555862bb0 "/dev/fedora/root") at inspect-fs.c:122
122	  if (m->im_type == MOUNTABLE_DEVICE) {
Missing separate debuginfos, use: debuginfo-install cyrus-sasl-lib-2.1.25-2.fc18.x86_64 gnome-keyring-3.6.3-1.fc18.x86_64 libconfig-1.4.8-3.fc18.x86_64 libselinux-2.1.12-7.3.fc18.x86_64
(gdb) bt
#0  guestfs___check_for_filesystem_on (g=g@entry=0x55555584c620, 
    mountable=0x555555862bb0 "/dev/fedora/root") at inspect-fs.c:122
#1  0x00007ffff72e3a20 in guestfs__inspect_os (g=g@entry=0x55555584c620)
    at inspect.c:58
#2  0x00007ffff7268ba5 in guestfs_inspect_os (g=0x55555584c620)
    at actions-0.c:499
#3  0x00005555555abebb in inspect_mount () at inspect.c:66
#4  0x000055555557b3ae in main (argc=<optimized out>, argv=0x7fffffffde88)
    at fish.c:471
(gdb) frame 0
#0  guestfs___check_for_filesystem_on (g=g@entry=0x55555584c620, 
    mountable=0x555555862bb0 "/dev/fedora/root") at inspect-fs.c:122
122	  if (m->im_type == MOUNTABLE_DEVICE) {
(gdb) print m
$1 = (struct guestfs_internal_mountable *) 0x0


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

guestfish 1.21.37fedora=20,release=1.fc20,libvirt

How reproducible:

100%

Steps to Reproduce:
1. See above.

Comment 1 Richard W.M. Jones 2013-05-10 13:34:51 UTC

Fixed upstream in commit 7a9ebd757cca0ec22fd730703bed16005ebfb6a4.

Note this happened because of a corruption problem in
the qemu .vhdx driver, described here:
https://bugzilla.redhat.com/show_bug.cgi?id=879234#c10