c51d926c74
* gnu/packages/gtk.scm (cairo)[replacement]: New field. (cairo/fixed): New variable. (cairo-xcb)[source]: Use patch. [replacement]: New field, set false. * gnu/packages/pdf.scm (poppler)[inputs]: Custom cairo should be replaced by a new custom patched cairo. * gnu/packages/patches/cairo-CVE-2016-9082.patch: New file. * gnu/local.mk (dist_patch_DATA): Register it.
123 lines
3.8 KiB
Diff
123 lines
3.8 KiB
Diff
From: Adrian Johnson <ajohnson@redneon.com>
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Date: Thu, 20 Oct 2016 21:12:30 +1030
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Subject: [PATCH] image: prevent invalid ptr access for > 4GB images
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Image data is often accessed using:
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image->data + y * image->stride
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On 64-bit achitectures if the image data is > 4GB, this computation
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will overflow since both y and stride are 32-bit types.
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bug report: https://bugs.freedesktop.org/show_bug.cgi?id=98165
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patch: https://bugs.freedesktop.org/attachment.cgi?id=127421
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---
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boilerplate/cairo-boilerplate.c | 4 +++-
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src/cairo-image-compositor.c | 4 ++--
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src/cairo-image-surface-private.h | 2 +-
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src/cairo-mesh-pattern-rasterizer.c | 2 +-
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src/cairo-png.c | 2 +-
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src/cairo-script-surface.c | 3 ++-
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6 files changed, 10 insertions(+), 7 deletions(-)
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diff --git a/boilerplate/cairo-boilerplate.c b/boilerplate/cairo-boilerplate.c
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index 7fdbf79..4804dea 100644
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--- a/boilerplate/cairo-boilerplate.c
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+++ b/boilerplate/cairo-boilerplate.c
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@@ -42,6 +42,7 @@
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#undef CAIRO_VERSION_H
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#include "../cairo-version.h"
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+#include <stddef.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <assert.h>
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@@ -976,7 +977,8 @@ cairo_surface_t *
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cairo_boilerplate_image_surface_create_from_ppm_stream (FILE *file)
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{
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char format;
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- int width, height, stride;
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+ int width, height;
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+ ptrdiff_t stride;
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int x, y;
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unsigned char *data;
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cairo_surface_t *image = NULL;
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diff --git a/src/cairo-image-compositor.c b/src/cairo-image-compositor.c
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index 48072f8..3ca0006 100644
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--- a/src/cairo-image-compositor.c
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+++ b/src/cairo-image-compositor.c
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@@ -1575,7 +1575,7 @@ typedef struct _cairo_image_span_renderer {
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pixman_image_t *src, *mask;
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union {
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struct fill {
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- int stride;
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+ ptrdiff_t stride;
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uint8_t *data;
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uint32_t pixel;
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} fill;
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@@ -1594,7 +1594,7 @@ typedef struct _cairo_image_span_renderer {
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struct finish {
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cairo_rectangle_int_t extents;
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int src_x, src_y;
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- int stride;
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+ ptrdiff_t stride;
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uint8_t *data;
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} mask;
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} u;
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diff --git a/src/cairo-image-surface-private.h b/src/cairo-image-surface-private.h
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index 8ca694c..7e78d61 100644
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--- a/src/cairo-image-surface-private.h
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+++ b/src/cairo-image-surface-private.h
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@@ -71,7 +71,7 @@ struct _cairo_image_surface {
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int width;
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int height;
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- int stride;
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+ ptrdiff_t stride;
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int depth;
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unsigned owns_data : 1;
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diff --git a/src/cairo-mesh-pattern-rasterizer.c b/src/cairo-mesh-pattern-rasterizer.c
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index 1b63ca8..e7f0db6 100644
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--- a/src/cairo-mesh-pattern-rasterizer.c
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+++ b/src/cairo-mesh-pattern-rasterizer.c
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@@ -470,7 +470,7 @@ draw_pixel (unsigned char *data, int width, int height, int stride,
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tg += tg >> 16;
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tb += tb >> 16;
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- *((uint32_t*) (data + y*stride + 4*x)) = ((ta << 16) & 0xff000000) |
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+ *((uint32_t*) (data + y*(ptrdiff_t)stride + 4*x)) = ((ta << 16) & 0xff000000) |
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((tr >> 8) & 0xff0000) | ((tg >> 16) & 0xff00) | (tb >> 24);
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}
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}
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diff --git a/src/cairo-png.c b/src/cairo-png.c
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index 562b743..aa8c227 100644
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--- a/src/cairo-png.c
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+++ b/src/cairo-png.c
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@@ -673,7 +673,7 @@ read_png (struct png_read_closure_t *png_closure)
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}
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for (i = 0; i < png_height; i++)
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- row_pointers[i] = &data[i * stride];
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+ row_pointers[i] = &data[i * (ptrdiff_t)stride];
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png_read_image (png, row_pointers);
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png_read_end (png, info);
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diff --git a/src/cairo-script-surface.c b/src/cairo-script-surface.c
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index ea0117d..91e4baa 100644
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--- a/src/cairo-script-surface.c
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+++ b/src/cairo-script-surface.c
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@@ -1202,7 +1202,8 @@ static cairo_status_t
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_write_image_surface (cairo_output_stream_t *output,
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const cairo_image_surface_t *image)
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{
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- int stride, row, width;
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+ int row, width;
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+ ptrdiff_t stride;
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uint8_t row_stack[CAIRO_STACK_BUFFER_SIZE];
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uint8_t *rowdata;
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uint8_t *data;
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--
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2.1.4
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