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authorNickolai Zeldovich <nickolai@csail.mit.edu>2013-01-22 10:03:00 -0500
committerUlrich Sibiller <uli42@gmx.de>2016-10-12 09:34:38 +0200
commite8ada07fa7dbbc88298e88a07f4b8613ec055cd8 (patch)
tree66d7be167c9a0b4537db9783f092eca8cd0685a1 /nx-X11/lib
parent290f94aea2b6cf0b265bce33cadcf2f2cbcacd53 (diff)
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XListFontsWithInfo: avoid accessing realloc'ed memory
If exactly one of the two reallocs in XListFontsWithInfo() fails, the subsequent code accesses memory freed by the other realloc. Signed-off-by: Nickolai Zeldovich <nickolai@csail.mit.edu> Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> (cherry picked from commit deedeada53676ee529d700bf96fde0b29a3a1def) Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
Diffstat (limited to 'nx-X11/lib')
-rw-r--r--nx-X11/lib/X11/FontInfo.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/nx-X11/lib/X11/FontInfo.c b/nx-X11/lib/X11/FontInfo.c
index 368beebe4..fb296b8a8 100644
--- a/nx-X11/lib/X11/FontInfo.c
+++ b/nx-X11/lib/X11/FontInfo.c
@@ -90,6 +90,11 @@ XFontStruct **info) /* RETURN */
Xrealloc ((char *) flist,
(unsigned) (sizeof(char *) * (size+1)));
+ if (tmp_finfo)
+ finfo = tmp_finfo;
+ if (tmp_flist)
+ flist = tmp_flist;
+
if ((! tmp_finfo) || (! tmp_flist)) {
/* free all the memory that we allocated */
for (j=(i-1); (j >= 0); j--) {
@@ -97,14 +102,10 @@ XFontStruct **info) /* RETURN */
if (finfo[j].properties)
Xfree((char *) finfo[j].properties);
}
- if (tmp_flist) Xfree((char *) tmp_flist);
- else Xfree((char *) flist);
- if (tmp_finfo) Xfree((char *) tmp_finfo);
- else Xfree((char *) finfo);
+ Xfree((char *) flist);
+ Xfree((char *) finfo);
goto clearwire;
}
- finfo = tmp_finfo;
- flist = tmp_flist;
}
else {
if (! (finfo = (XFontStruct *)