fixes from Linux kernel

2 files changed, 24 insertions, 2 deletions

diff --git a/shared/r128_state.c b/shared/r128_state.c
index f411657f..dcacb0f3 100644
--- a/shared/r128_state.c
+++ b/shared/r128_state.c
@@ -915,6 +915,9 @@ static int r128_cce_dispatch_write_span( drm_device_t *dev,
 	DRM_DEBUG( "\n" );
 
 	count = depth->n;
+	if (count>4096 || count<=0)
+		return -EMSGSIZE;
+
 	if ( DRM_COPY_FROM_USER( &x, depth->x, sizeof(x) ) ) {
 		return DRM_ERR(EFAULT);
 	}
@@ -1008,6 +1011,8 @@ static int r128_cce_dispatch_write_pixels( drm_device_t *dev,
 	DRM_DEBUG( "\n" );
 
 	count = depth->n;
+	if (count > 4096 || count <= 0)
+		return -EMSGSIZE;
 
 	xbuf_size = count * sizeof(*x);
 	ybuf_size = count * sizeof(*y);
@@ -1125,6 +1130,9 @@ static int r128_cce_dispatch_read_span( drm_device_t *dev,
 	DRM_DEBUG( "\n" );
 
 	count = depth->n;
+	if (count > 4096 || count <= 0)
+		return -EMSGSIZE;
+
 	if ( DRM_COPY_FROM_USER( &x, depth->x, sizeof(x) ) ) {
 		return DRM_ERR(EFAULT);
 	}
@@ -1167,6 +1175,9 @@ static int r128_cce_dispatch_read_pixels( drm_device_t *dev,
 	DRM_DEBUG( "%s\n", __FUNCTION__ );
 
 	count = depth->n;
+	if (count > 4096 || count <= 0)
+		return -EMSGSIZE;
+
 	if ( count > dev_priv->depth_pitch ) {
 		count = dev_priv->depth_pitch;
 	}
diff --git a/shared/radeon_state.c b/shared/radeon_state.c
index 0ed1f53d..fca72827 100644
--- a/shared/radeon_state.c
+++ b/shared/radeon_state.c
@@ -1497,7 +1497,7 @@ static int radeon_cp_dispatch_texture( DRMFILE filp,
 		/* Update the input parameters for next time */
 		image->y += height;
 		image->height -= height;
-		(const u8 *)image->data += size;
+		image->data = (const u8 *)image->data + size;
 	} while (image->height > 0);
 
 	/* Flush the pixel cache after the blit completes.  This ensures
@@ -2485,10 +2485,21 @@ int radeon_cp_getparam( DRM_IOCTL_ARGS )
 	case RADEON_PARAM_STATUS_HANDLE:
 		value = dev_priv->ring_rptr_offset;
 		break;
+#if BITS_PER_LONG == 32
+	/*
+	 * This ioctl() doesn't work on 64-bit platforms because hw_lock is a
+	 * pointer which can't fit into an int-sized variable.  According to
+	 * Michel Dänzer, the ioctl() is only used on embedded platforms, so
+	 * not supporting it shouldn't be a problem.  If the same functionality
+	 * is needed on 64-bit platforms, a new ioctl() would have to be added,
+	 * so backwards-compatibility for the embedded platforms can be
+	 * maintained.  --davidm 4-Feb-2004.
+	 */
 	case RADEON_PARAM_SAREA_HANDLE:
 		/* The lock is the first dword in the sarea. */
-		value = (int)dev->lock.hw_lock; 
+		value = (long)dev->lock.hw_lock; 
 		break;	
+#endif
 	case RADEON_PARAM_GART_TEX_HANDLE:
 		value = dev_priv->gart_textures_offset;
 		break;