diff options
Diffstat (limited to 'import-layers/yocto-poky/meta/recipes-extended/ghostscript/ghostscript/CVE-2016-10219.patch')
-rw-r--r-- | import-layers/yocto-poky/meta/recipes-extended/ghostscript/ghostscript/CVE-2016-10219.patch | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/import-layers/yocto-poky/meta/recipes-extended/ghostscript/ghostscript/CVE-2016-10219.patch b/import-layers/yocto-poky/meta/recipes-extended/ghostscript/ghostscript/CVE-2016-10219.patch new file mode 100644 index 000000000..574abe0e4 --- /dev/null +++ b/import-layers/yocto-poky/meta/recipes-extended/ghostscript/ghostscript/CVE-2016-10219.patch @@ -0,0 +1,49 @@ +From 4bef1a1d32e29b68855616020dbff574b9cda08f Mon Sep 17 00:00:00 2001 +From: Robin Watts <Robin.Watts@artifex.com> +Date: Thu, 29 Dec 2016 15:57:43 +0000 +Subject: [PATCH] Bug 697453: Avoid divide by 0 in scan conversion code. + +Arithmetic overflow due to extreme values in the scan conversion +code can cause a division by 0. + +Avoid this with a simple extra check. + + dx_old=cf814d81 + endp->x_next=b0e859b9 + alp->x_next=8069a73a + +leads to dx_den = 0 + +Upstream-Status: Backport +CVE: CVE-2016-10219 + +Signed-off-by: Catalin Enache <catalin.enache@windriver.com> +--- + base/gxfill.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +diff --git a/base/gxfill.c b/base/gxfill.c +index 99196c0..2f81bb0 100644 +--- a/base/gxfill.c ++++ b/base/gxfill.c +@@ -1741,7 +1741,7 @@ intersect(active_line *endp, active_line *alp, fixed y, fixed y1, fixed *p_y_new + fixed dx_old = alp->x_current - endp->x_current; + fixed dx_den = dx_old + endp->x_next - alp->x_next; + +- if (dx_den <= dx_old) ++ if (dx_den <= dx_old || dx_den == 0) + return false; /* Intersection isn't possible. */ + dy = y1 - y; + if_debug3('F', "[F]cross: dy=%g, dx_old=%g, dx_new=%g\n", +@@ -1750,7 +1750,7 @@ intersect(active_line *endp, active_line *alp, fixed y, fixed y1, fixed *p_y_new + /* Do the computation in single precision */ + /* if the values are small enough. */ + y_new = +- ((dy | dx_old) < 1L << (size_of(fixed) * 4 - 1) ? ++ (((ufixed)(dy | dx_old)) < (1L << (size_of(fixed) * 4 - 1)) ? + dy * dx_old / dx_den : + (INCR_EXPR(mq_cross), fixed_mult_quo(dy, dx_old, dx_den))) + + y; +-- +2.10.2 + |