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Bug 1127719 - rsvg-convert returns segfault on s390x
Summary: rsvg-convert returns segfault on s390x
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: librsvg2
Version: 6.6
Hardware: s390x
OS: Unspecified
Target Milestone: rc
: ---
Assignee: Matthias Clasen
QA Contact: Desktop QE
: 1130059 (view as bug list)
Depends On:
TreeView+ depends on / blocked
Reported: 2014-08-07 12:03 UTC by Martin Simon
Modified: 2014-10-14 07:41 UTC (History)
4 users (show)

Fixed In Version: librsvg2-2.26.0-14.el6
Doc Type: Bug Fix
Doc Text:
Cause: Missing forward declarations for various functions leading the compiler to assumpt an implicit 32-bit integer return type. Consequence: crash resulting from string pointer getting truncated to 32-bits and then sign extended back to 64-bits Fix: Adding #include lines for the appropriate headers at the top of the affected source files. Result: no more crashes
Clone Of:
Last Closed: 2014-10-14 07:41:18 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2014:1554 0 normal SHIPPED_LIVE gtk2, gdk-pixbuf2, librsvg2, and libwmf bug fix and enhancement update 2014-10-14 01:27:57 UTC

Description Martin Simon 2014-08-07 12:03:17 UTC
Description of problem:
rsvg-convert utility used to convert svg files to different types returns segmentation fault on s390x

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

How reproducible:

Steps to Reproduce:
1. get any sample.svg
2. rsvg-convert -f png -o output.png sample.svg

Actual results:
Segmentation Fault

Expected results:
the file should be converted

Additional info:
gdb output:
Program received signal SIGSEGV, Segmentation fault.
g_utf8_validate (str=0xffffffffa6270d10 <Address 0xffffffffa6270d10 out of bounds>, max_len=-1, end=
    0x0) at gutf8.c:1771
1771	    p = fast_validate (str);

Comment 1 Ray Strode [halfline] 2014-08-21 18:23:43 UTC
*** Bug 1130059 has been marked as a duplicate of this bug. ***

Comment 2 Ray Strode [halfline] 2014-08-21 20:32:51 UTC
So i don't yet have an s390 machine to confirm (waiting on beaker), but looking at the backtrace on the other bug I think I see the problem:

In frame #6 we have:

#6  0x00000041ff2514b0 in _rsvg_io_acquire_data (href=0x96888b40 "/usr/share/gnome-panel/pixmaps/clock-face-small-night.svg", base_uri=0x96888b90 "/usr/share/gnome-panel/pixmaps/clock-face-small-night.svg", len=0x3fffff4e3e8, error=0x0) at rsvg-io.c:165
        data = <value optimized out>

the filename is 0x9688b40

In frame 4 however we have:

#4  g_file_get_contents (filename=0xffffffff9687fb70 <Address 0xffffffff9687fb70 out of bounds>, contents=0x3fffff4e278, length=0x3fffff4e3e8, error=0x0) at gfileutils.c:843
        __PRETTY_FUNCTION__ = "g_file_get_contents"

which has filename that looks like a pointer that's been stuffed into a 32-bit int and then sign extended back to 64bits.  Indeed looking in the code I see:

+    path = rsvg_get_file_path (filename, base_uri);•

but no #include <rsvg-image.h> at the top of the file.

There's also an uninitialized variable access in the same patch that should probably be mopped up too.

Comment 3 Ray Strode [halfline] 2014-08-21 21:06:22 UTC
i can confirm this patch fixes it:

diff --git a/split-io-handling.patch b/split-io-handling.patch
index 5a54e00..2319953 100644
--- a/split-io-handling.patch
+++ b/split-io-handling.patch
@@ -171,7 +171,7 @@ diff -up librsvg-2.26.0/rsvg-base.c.split-io librsvg-2.26.0/rsvg-base.c
      if (type == XML_EXTERNAL_PARAMETER_ENTITY && !content) {
 -      GByteArray *arr;
-+      guint8 *entity_data;
++      guint8 *entity_data = NULL;
 +      gsize entity_data_len;
 +      if (systemId)
@@ -415,7 +415,7 @@ diff -up librsvg-2.26.0/rsvg-io.c.split-io librsvg-2.26.0/rsvg-io.c
 +#include "config.h"
++#include "rsvg-image.h"
 +#include "rsvg-io.h"
 +#include "rsvg-private.h"
diff --git a/strict-load.patch b/strict-load.patch
index 3ae2935..e0c7015 100644
--- a/strict-load.patch
+++ b/strict-load.patch
@@ -5,7 +5,7 @@ diff -up librsvg-2.26.0/rsvg-base.c.strict-load librsvg-2.26.0/rsvg-base.c
  #include "config.h"
++#define _GNU_SOURCE
  #ifdef HAVE_SVGZ
  #include <gsf/gsf-input-gzip.h>
  #include <gsf/gsf-input-memory.h>
@@ -23,7 +23,7 @@ diff -up librsvg-2.26.0/rsvg-base.c.strict-load librsvg-2.26.0/rsvg-base.c
  #include "rsvg-paint-server.h"
 +#include "rsvg-xml.h"
++#include <stdlib.h>
   * This is configurable at runtime

Comment 6 errata-xmlrpc 2014-10-14 07:41:18 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.


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