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diff -Nru openjdk.orig/jdk/src/share/classes/sun/awt/image/ByteComponentRaster.java openjdk/jdk/src/share/classes/sun/awt/image/ByteComponentRaster.java
--- openjdk.orig/jdk/src/share/classes/sun/awt/image/ByteComponentRaster.java 2011-11-14 22:11:59.000000000 +0000
+++ jdk/src/share/classes/sun/awt/image/ByteComponentRaster.java 2013-02-01 21:49:28.911324533 +0000
@@ -198,7 +198,7 @@
}
this.bandOffset = this.dataOffsets[0];
- verify(false);
+ verify();
}
/**
@@ -857,38 +857,68 @@
}
/**
- * Verify that the layout parameters are consistent with
- * the data. If strictCheck
- * is false, this method will check for ArrayIndexOutOfBounds conditions. If
- * strictCheck is true, this method will check for additional error
- * conditions such as line wraparound (width of a line greater than
- * the scanline stride).
- * @return String Error string, if the layout is incompatible with
- * the data. Otherwise returns null.
- */
- private void verify (boolean strictCheck) {
- // Make sure data for Raster is in a legal range
- for (int i=0; i < dataOffsets.length; i++) {
+ * Verify that the layout parameters are consistent with the data.
+ *
+ * The method verifies whether scanline stride and pixel stride do not
+ * cause an integer overflow during calculation of a position of the pixel
+ * in data buffer. It also verifies whether the data buffer has enough data
+ * to correspond the raster layout attributes.
+ *
+ * @throws RasterFormatException if an integer overflow is detected,
+ * or if data buffer has not enough capacity.
+ */
+ protected final void verify() {
+ for (int i = 0; i < dataOffsets.length; i++) {
if (dataOffsets[i] < 0) {
- throw new RasterFormatException("Data offsets for band "+i+
- "("+dataOffsets[i]+
- ") must be >= 0");
+ throw new RasterFormatException("Data offsets for band " + i
+ + "(" + dataOffsets[i]
+ + ") must be >= 0");
}
}
int maxSize = 0;
int size;
- for (int i=0; i < numDataElements; i++) {
- size = (height-1)*scanlineStride + (width-1)*pixelStride +
- dataOffsets[i];
+ // we can be sure that width and height are greater than 0
+ if (scanlineStride < 0 ||
+ scanlineStride > (Integer.MAX_VALUE / height))
+ {
+ // integer overflow
+ throw new RasterFormatException("Incorrect scanline stride: "
+ + scanlineStride);
+ }
+ int lastScanOffset = (height - 1) * scanlineStride;
+
+ if (pixelStride < 0 ||
+ pixelStride > (Integer.MAX_VALUE / width))
+ {
+ // integer overflow
+ throw new RasterFormatException("Incorrect pixel stride: "
+ + pixelStride);
+ }
+ int lastPixelOffset = (width - 1) * pixelStride;
+
+ if (lastPixelOffset > (Integer.MAX_VALUE - lastScanOffset)) {
+ // integer overflow
+ throw new RasterFormatException("Incorrect raster attributes");
+ }
+ lastPixelOffset += lastScanOffset;
+
+ for (int i = 0; i < numDataElements; i++) {
+ size = lastPixelOffset + dataOffsets[i];
+ if (dataOffsets[i] > (Integer.MAX_VALUE - lastPixelOffset)) {
+ throw new RasterFormatException("Incorrect band offset: "
+ + dataOffsets[i]);
+
+ }
+
if (size > maxSize) {
maxSize = size;
}
}
if (data.length < maxSize) {
- throw new RasterFormatException("Data array too small (should be "+
- maxSize+" )");
+ throw new RasterFormatException("Data array too small (should be "
+ + maxSize + " )");
}
}
diff -Nru openjdk.orig/jdk/src/share/classes/sun/awt/image/ByteInterleavedRaster.java openjdk/jdk/src/share/classes/sun/awt/image/ByteInterleavedRaster.java
--- openjdk.orig/jdk/src/share/classes/sun/awt/image/ByteInterleavedRaster.java 2011-11-14 22:11:59.000000000 +0000
+++ jdk/src/share/classes/sun/awt/image/ByteInterleavedRaster.java 2013-02-01 21:49:28.911324533 +0000
@@ -250,7 +250,7 @@
}
}
- verify(false);
+ verify();
}
/**
@@ -1292,33 +1292,6 @@
return createCompatibleWritableRaster(width,height);
}
- /**
- * Verify that the layout parameters are consistent with
- * the data. If strictCheck
- * is false, this method will check for ArrayIndexOutOfBounds conditions. If
- * strictCheck is true, this method will check for additional error
- * conditions such as line wraparound (width of a line greater than
- * the scanline stride).
- * @return String Error string, if the layout is incompatible with
- * the data. Otherwise returns null.
- */
- private void verify (boolean strictCheck) {
- int maxSize = 0;
- int size;
-
- for (int i=0; i < numDataElements; i++) {
- size = (height-1)*scanlineStride + (width-1)*pixelStride +
- dataOffsets[i];
- if (size > maxSize) {
- maxSize = size;
- }
- }
- if (data.length < maxSize) {
- throw new RasterFormatException("Data array too small (should be "+
- maxSize+" )");
- }
- }
-
public String toString() {
return new String ("ByteInterleavedRaster: width = "+width+" height = "
+ height
diff -Nru openjdk.orig/jdk/src/share/classes/sun/awt/image/ShortComponentRaster.java openjdk/jdk/src/share/classes/sun/awt/image/ShortComponentRaster.java
--- openjdk.orig/jdk/src/share/classes/sun/awt/image/ShortComponentRaster.java 2011-11-14 22:11:59.000000000 +0000
+++ jdk/src/share/classes/sun/awt/image/ShortComponentRaster.java 2013-02-01 21:49:28.911324533 +0000
@@ -198,7 +198,7 @@
}
this.bandOffset = this.dataOffsets[0];
- verify(false);
+ verify();
}
/**
@@ -791,38 +791,67 @@
}
/**
- * Verify that the layout parameters are consistent with
- * the data. If strictCheck
- * is false, this method will check for ArrayIndexOutOfBounds conditions. If
- * strictCheck is true, this method will check for additional error
- * conditions such as line wraparound (width of a line greater than
- * the scanline stride).
- * @return String Error string, if the layout is incompatible with
- * the data. Otherwise returns null.
- */
- private void verify (boolean strictCheck) {
- // Make sure data for Raster is in a legal range
- for (int i=0; i < dataOffsets.length; i++) {
+ * Verify that the layout parameters are consistent with the data.
+ *
+ * The method verifies whether scanline stride and pixel stride do not
+ * cause an integer overflow during calculation of a position of the pixel
+ * in data buffer. It also verifies whether the data buffer has enough data
+ * to correspond the raster layout attributes.
+ *
+ * @throws RasterFormatException if an integer overflow is detected,
+ * or if data buffer has not enough capacity.
+ */
+ protected final void verify() {
+ for (int i = 0; i < dataOffsets.length; i++) {
if (dataOffsets[i] < 0) {
- throw new RasterFormatException("Data offsets for band "+i+
- "("+dataOffsets[i]+
- ") must be >= 0");
+ throw new RasterFormatException("Data offsets for band " + i
+ + "(" + dataOffsets[i]
+ + ") must be >= 0");
}
}
int maxSize = 0;
int size;
- for (int i=0; i < numDataElements; i++) {
- size = (height-1)*scanlineStride + (width-1)*pixelStride +
- dataOffsets[i];
+ // we can be sure that width and height are greater than 0
+ if (scanlineStride < 0 ||
+ scanlineStride > (Integer.MAX_VALUE / height))
+ {
+ // integer overflow
+ throw new RasterFormatException("Incorrect scanline stride: "
+ + scanlineStride);
+ }
+ int lastScanOffset = (height - 1) * scanlineStride;
+
+ if (pixelStride < 0 ||
+ pixelStride > (Integer.MAX_VALUE / width))
+ {
+ // integer overflow
+ throw new RasterFormatException("Incorrect pixel stride: "
+ + pixelStride);
+ }
+ int lastPixelOffset = (width - 1) * pixelStride;
+
+ if (lastPixelOffset > (Integer.MAX_VALUE - lastScanOffset)) {
+ // integer overflow
+ throw new RasterFormatException("Incorrect raster attributes");
+ }
+ lastPixelOffset += lastScanOffset;
+
+ for (int i = 0; i < numDataElements; i++) {
+ size = lastPixelOffset + dataOffsets[i];
+ if (dataOffsets[i] > (Integer.MAX_VALUE - lastPixelOffset)) {
+ throw new RasterFormatException("Incorrect band offset: "
+ + dataOffsets[i]);
+ }
+
if (size > maxSize) {
maxSize = size;
}
}
if (data.length < maxSize) {
- throw new RasterFormatException("Data array too small (should be "+
- maxSize+" )");
+ throw new RasterFormatException("Data array too small (should be "
+ + maxSize + " )");
}
}
diff -Nru openjdk.orig/jdk/src/share/classes/sun/awt/image/ShortInterleavedRaster.java openjdk/jdk/src/share/classes/sun/awt/image/ShortInterleavedRaster.java
--- openjdk.orig/jdk/src/share/classes/sun/awt/image/ShortInterleavedRaster.java 2011-11-14 22:11:59.000000000 +0000
+++ jdk/src/share/classes/sun/awt/image/ShortInterleavedRaster.java 2013-02-01 21:49:28.911324533 +0000
@@ -171,7 +171,7 @@
sampleModel);
}
this.bandOffset = this.dataOffsets[0];
- verify(false);
+ verify();
}
/**
@@ -762,33 +762,6 @@
return createCompatibleWritableRaster(width,height);
}
- /**
- * Verify that the layout parameters are consistent with
- * the data. If strictCheck
- * is false, this method will check for ArrayIndexOutOfBounds conditions. If
- * strictCheck is true, this method will check for additional error
- * conditions such as line wraparound (width of a line greater than
- * the scanline stride).
- * @return String Error string, if the layout is incompatible with
- * the data. Otherwise returns null.
- */
- private void verify (boolean strictCheck) {
- int maxSize = 0;
- int size;
-
- for (int i=0; i < numDataElements; i++) {
- size = (height-1)*scanlineStride + (width-1)*pixelStride +
- dataOffsets[i];
- if (size > maxSize) {
- maxSize = size;
- }
- }
- if (data.length < maxSize) {
- throw new RasterFormatException("Data array too small (should be "+
- maxSize+" )");
- }
- }
-
public String toString() {
return new String ("ShortInterleavedRaster: width = "+width
+" height = " + height
diff -Nru openjdk.orig/jdk/src/share/native/sun/awt/image/awt_parseImage.c openjdk/jdk/src/share/native/sun/awt/image/awt_parseImage.c
--- openjdk.orig/jdk/src/share/native/sun/awt/image/awt_parseImage.c 2011-11-14 22:12:11.000000000 +0000
+++ jdk/src/share/native/sun/awt/image/awt_parseImage.c 2013-02-01 21:54:40.100132273 +0000
@@ -114,6 +114,62 @@
return status;
}
+/* Verifies whether the channel offsets are sane and correspond to the type of
+ * the raster.
+ *
+ * Return value:
+ * 0: Failure: channel offsets are invalid
+ * 1: Success
+ */
+static int checkChannelOffsets(RasterS_t *rasterP, int dataArrayLength) {
+ int i, lastPixelOffset, lastScanOffset;
+ switch (rasterP->rasterType) {
+ case COMPONENT_RASTER_TYPE:
+ if (!SAFE_TO_MULT(rasterP->height, rasterP->scanlineStride)) {
+ return 0;
+ }
+ if (!SAFE_TO_MULT(rasterP->width, rasterP->pixelStride)) {
+ return 0;
+ }
+
+ lastScanOffset = (rasterP->height - 1) * rasterP->scanlineStride;
+ lastPixelOffset = (rasterP->width - 1) * rasterP->pixelStride;
+
+
+ if (!SAFE_TO_ADD(lastPixelOffset, lastScanOffset)) {
+ return 0;
+ }
+
+ lastPixelOffset += lastScanOffset;
+
+ for (i = 0; i < rasterP->numDataElements; i++) {
+ int off = rasterP->chanOffsets[i];
+ int size = lastPixelOffset + off;
+
+ if (off < 0 || !SAFE_TO_ADD(lastPixelOffset, off)) {
+ return 0;
+ }
+
+ if (size < lastPixelOffset || size >= dataArrayLength) {
+ // an overflow, or insufficient buffer capacity
+ return 0;
+ }
+ }
+ return 1;
+ case BANDED_RASTER_TYPE:
+ // NB:caller does not support the banded rasters yet,
+ // so this branch of the code must be re-defined in
+ // order to provide valid criteria for the data offsets
+ // verification, when/if banded rasters will be supported.
+ // At the moment, we prohibit banded rasters as well.
+ return 0;
+ default:
+ // PACKED_RASTER_TYPE: does not support channel offsets
+ // UNKNOWN_RASTER_TYPE: should not be used, likely indicates an error
+ return 0;
+ }
+}
+
/* Parse the raster. All of the raster information is returned in the
* rasterP structure.
*
@@ -125,7 +181,6 @@
int awt_parseRaster(JNIEnv *env, jobject jraster, RasterS_t *rasterP) {
jobject joffs = NULL;
/* int status;*/
- int isDiscrete = TRUE;
if (JNU_IsNull(env, jraster)) {
JNU_ThrowNullPointerException(env, "null Raster object");
@@ -155,6 +210,9 @@
return -1;
}
+ // make sure that the raster type is initialized
+ rasterP->rasterType = UNKNOWN_RASTER_TYPE;
+
if (rasterP->numBands <= 0 ||
rasterP->numBands > MAX_NUMBANDS)
{
@@ -254,7 +312,6 @@
}
rasterP->chanOffsets[0] = (*env)->GetIntField(env, jraster, g_BPRdataBitOffsetID);
rasterP->dataType = BYTE_DATA_TYPE;
- isDiscrete = FALSE;
}
else {
rasterP->type = sun_awt_image_IntegerComponentRaster_TYPE_CUSTOM;
@@ -265,7 +322,19 @@
return 0;
}
- if (isDiscrete) {
+ // do basic validation of the raster structure
+ if (rasterP->width <= 0 || rasterP->height <= 0 ||
+ rasterP->pixelStride <= 0 || rasterP->scanlineStride <= 0)
+ {
+ // invalid raster
+ return -1;
+ }
+
+ // channel (data) offsets
+ switch (rasterP->rasterType) {
+ case COMPONENT_RASTER_TYPE:
+ case BANDED_RASTER_TYPE: // note that this routine does not support banded rasters at the moment
+ // get channel (data) offsets
rasterP->chanOffsets = NULL;
if (SAFE_TO_ALLOC_2(rasterP->numDataElements, sizeof(jint))) {
rasterP->chanOffsets =
@@ -278,6 +347,17 @@
}
(*env)->GetIntArrayRegion(env, joffs, 0, rasterP->numDataElements,
rasterP->chanOffsets);
+ if (rasterP->jdata == NULL) {
+ // unable to verify the raster
+ return -1;
+ }
+ // verify whether channel offsets look sane
+ if (!checkChannelOffsets(rasterP, (*env)->GetArrayLength(env, rasterP->jdata))) {
+ return -1;
+ }
+ break;
+ default:
+ ; // PACKED_RASTER_TYPE does not use the channel offsets.
}
#if 0
diff -Nru openjdk.orig/jdk/src/share/native/sun/awt/medialib/safe_alloc.h openjdk/jdk/src/share/native/sun/awt/medialib/safe_alloc.h
--- openjdk.orig/jdk/src/share/native/sun/awt/medialib/safe_alloc.h 2011-11-14 22:12:12.000000000 +0000
+++ jdk/src/share/native/sun/awt/medialib/safe_alloc.h 2013-02-01 21:49:28.911324533 +0000
@@ -41,5 +41,10 @@
(((w) > 0) && ((h) > 0) && ((sz) > 0) && \
(((0xffffffffu / ((juint)(w))) / ((juint)(h))) > ((juint)(sz))))
+#define SAFE_TO_MULT(a, b) \
+ (((a) > 0) && ((b) >= 0) && ((0x7fffffff / (a)) > (b)))
+
+#define SAFE_TO_ADD(a, b) \
+ (((a) >= 0) && ((b) >= 0) && ((0x7fffffff - (a)) > (b)))
#endif // __SAFE_ALLOC_H__
|
