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-rw-r--r--main/libxinerama/0001-Use-_XEatDataWords-to-avoid-overflow-of-_XEatData-ca.patch78
1 files changed, 78 insertions, 0 deletions
diff --git a/main/libxinerama/0001-Use-_XEatDataWords-to-avoid-overflow-of-_XEatData-ca.patch b/main/libxinerama/0001-Use-_XEatDataWords-to-avoid-overflow-of-_XEatData-ca.patch
new file mode 100644
index 0000000000..eb70095949
--- /dev/null
+++ b/main/libxinerama/0001-Use-_XEatDataWords-to-avoid-overflow-of-_XEatData-ca.patch
@@ -0,0 +1,78 @@
+From 7ce3ce4be46087f9cc57cb415875abaaa961f734 Mon Sep 17 00:00:00 2001
+From: Alan Coopersmith <alan.coopersmith@oracle.com>
+Date: Sat, 4 May 2013 09:21:14 -0700
+Subject: [PATCH 1/2] Use _XEatDataWords to avoid overflow of _XEatData
+ calculations
+
+rep.length is a CARD32, so rep.length << 2 could overflow in 32-bit builds
+
+Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
+---
+ configure.ac | 6 ++++++
+ src/Xinerama.c | 19 ++++++++++++++++++-
+ 2 files changed, 24 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index e335508..046a1aa 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -42,6 +42,12 @@ XORG_CHECK_MALLOC_ZERO
+ # Obtain compiler/linker options for depedencies
+ PKG_CHECK_MODULES(XINERAMA, x11 xext xextproto [xineramaproto >= 1.1.99.1])
+
++# Check for _XEatDataWords function that may be patched into older Xlib releases
++SAVE_LIBS="$LIBS"
++LIBS="$XINERAMA_LIBS"
++AC_CHECK_FUNCS([_XEatDataWords])
++LIBS="$SAVE_LIBS"
++
+ # Allow checking code with lint, sparse, etc.
+ XORG_WITH_LINT
+ LINT_FLAGS="${LINT_FLAGS} ${XINERAMA_CFLAGS}"
+diff --git a/src/Xinerama.c b/src/Xinerama.c
+index 7d7e4d8..04189b6 100644
+--- a/src/Xinerama.c
++++ b/src/Xinerama.c
+@@ -23,6 +23,10 @@ dealings in this Software without prior written authorization from Digital
+ Equipment Corporation.
+ ******************************************************************/
+
++#ifdef HAVE_CONFIG_H
++# include "config.h"
++#endif
++
+ #include <X11/Xlibint.h>
+ #include <X11/Xutil.h>
+ #include <X11/extensions/Xext.h>
+@@ -31,6 +35,19 @@ Equipment Corporation.
+ #include <X11/extensions/panoramiXproto.h>
+ #include <X11/extensions/Xinerama.h>
+
++#ifndef HAVE__XEATDATAWORDS
++#include <X11/Xmd.h> /* for LONG64 on 64-bit platforms */
++#include <limits.h>
++
++static inline void _XEatDataWords(Display *dpy, unsigned long n)
++{
++# ifndef LONG64
++ if (n >= (ULONG_MAX >> 2))
++ _XIOError(dpy);
++# endif
++ _XEatData (dpy, n << 2);
++}
++#endif
+
+ static XExtensionInfo _panoramiX_ext_info_data;
+ static XExtensionInfo *panoramiX_ext_info = &_panoramiX_ext_info_data;
+@@ -302,7 +319,7 @@ XineramaQueryScreens(
+
+ *number = rep.number;
+ } else
+- _XEatData(dpy, rep.length << 2);
++ _XEatDataWords(dpy, rep.length);
+ } else {
+ *number = 0;
+ }
+--
+1.8.2.3
+