diff options
| author | Ludovic Courtès <ludo@gnu.org> | 2015-09-21 16:01:45 +0200 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2015-09-21 16:01:45 +0200 |
| commit | 1def6f6b2c1d2dca6bff27235c15317f229746a9 (patch) | |
| tree | e11dd8782213953b5c60c044bbee414a659ef81f /gnu | |
| parent | f88ee3ade7847cee3c1ace4b516b3e95646d79c3 (diff) | |
gnu: pixman: Work around pointer arithmetic bug.
* gnu/packages/patches/pixman-pointer-arithmetic.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/xdisorg.scm (pixman)[source]: Use it.
Diffstat (limited to 'gnu')
| -rw-r--r-- | gnu/packages/patches/pixman-pointer-arithmetic.patch | 15 | ||||
| -rw-r--r-- | gnu/packages/xdisorg.scm | 3 |
2 files changed, 17 insertions, 1 deletions
diff --git a/gnu/packages/patches/pixman-pointer-arithmetic.patch b/gnu/packages/patches/pixman-pointer-arithmetic.patch new file mode 100644 index 0000000000..d34e6632a0 --- /dev/null +++ b/gnu/packages/patches/pixman-pointer-arithmetic.patch @@ -0,0 +1,15 @@ +Fix <https://bugs.freedesktop.org/show_bug.cgi?id=92027> whereby +an arithemitic overflow could occur while doing pointer arithmetic, +leading pixman to use an invalid address as the destination buffer. + +--- pixman-0.32.6/pixman/pixman-general.c 2015-09-21 15:14:34.695981325 +0200 ++++ pixman-0.32.6/pixman/pixman-general.c 2015-09-21 15:19:48.898355548 +0200 +@@ -144,8 +144,7 @@ general_composite_rect (pixman_implemen + mask_buffer = ALIGN (src_buffer + width * Bpp); + dest_buffer = ALIGN (mask_buffer + width * Bpp); + +- if (ALIGN (dest_buffer + width * Bpp) > +- scanline_buffer + sizeof (stack_scanline_buffer)) ++ if ((width + 1) * Bpp * 3 > sizeof (stack_scanline_buffer)) + { + scanline_buffer = pixman_malloc_ab_plus_c (width, Bpp * 3, 32 * 3); diff --git a/gnu/packages/xdisorg.scm b/gnu/packages/xdisorg.scm index 9fd9f4a321..7aa82fe312 100644 --- a/gnu/packages/xdisorg.scm +++ b/gnu/packages/xdisorg.scm @@ -150,7 +150,8 @@ following the mouse.") ".tar.gz")) (sha256 (base32 - "0129g4zdrw5hif5783li7rzcr4vpbc2cfia91azxmsk0h0xx3zix")))) + "0129g4zdrw5hif5783li7rzcr4vpbc2cfia91azxmsk0h0xx3zix")) + (patches (list (search-patch "pixman-pointer-arithmetic.patch"))))) (build-system gnu-build-system) (inputs `(("libpng" ,libpng) |