Module: Mesa Branch: master Commit: ecc89e4e42c0eda41de5a37d9d0614d0846e3a3e URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=ecc89e4e42c0eda41de5a37d9d0614d0846e3a3e
Author: Carl Worth <[email protected]> Date: Wed Sep 3 14:33:18 2014 -0700 egl: Restrict multiplication in calloc arguments to use compile-time constants As explained in the previous commit, we want to avoid the possibility of integer-multiplication overflow while allocating buffers. In these two cases, the final allocation size is the product of three values: one variable and two that are fixed constants at compile time. In this commit, we move the explicit multiplication to involve only the compile-time constants, preventing any overflow from that multiplication, (and allowing calloc to catch any potential overflow from the remainining implicit multiplication). Reviewed-by: Matt Turner <[email protected]> --- src/egl/drivers/dri2/platform_drm.c | 2 +- src/egl/drivers/dri2/platform_wayland.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/src/egl/drivers/dri2/platform_drm.c b/src/egl/drivers/dri2/platform_drm.c index e272beb..70bd7d4 100644 --- a/src/egl/drivers/dri2/platform_drm.c +++ b/src/egl/drivers/dri2/platform_drm.c @@ -352,7 +352,7 @@ dri2_drm_get_buffers(__DRIdrawable * driDrawable, const unsigned int format = 32; int i; - attachments_with_format = calloc(count * 2, sizeof(unsigned int)); + attachments_with_format = calloc(count, 2 * sizeof(unsigned int)); if (!attachments_with_format) { *out_count = 0; return NULL; diff --git a/src/egl/drivers/dri2/platform_wayland.c b/src/egl/drivers/dri2/platform_wayland.c index 537d26e..59b2792 100644 --- a/src/egl/drivers/dri2/platform_wayland.c +++ b/src/egl/drivers/dri2/platform_wayland.c @@ -468,7 +468,7 @@ dri2_wl_get_buffers(__DRIdrawable * driDrawable, const unsigned int format = 32; int i; - attachments_with_format = calloc(count * 2, sizeof(unsigned int)); + attachments_with_format = calloc(count, 2 * sizeof(unsigned int)); if (!attachments_with_format) { *out_count = 0; return NULL; _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
