Cairo: Fix Denial-of-Service Attack due to Logical Problem in Program
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https://bugs.freedesktop.org/show_bug.cgi?id=100763
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CVE: CVE-2017-7475
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Upstream-Status: Submitted
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Signed-off-by: Fan Xin <fan.xin@jp.fujitsu.com>
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Index: cairo-1.15.4/src/cairo-ft-font.c
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===================================================================
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--- cairo-1.15.4.orig/src/cairo-ft-font.c
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+++ cairo-1.15.4/src/cairo-ft-font.c
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@@ -1149,7 +1149,7 @@ _get_bitmap_surface (FT_Bitmap *bi
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width = bitmap->width;
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height = bitmap->rows;
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- if (width == 0 || height == 0) {
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+ if (width == 0 || height == 0 || bitmap->buffer == NULL) {
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*surface = (cairo_image_surface_t *)
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cairo_image_surface_create_for_data (NULL, format, 0, 0, 0);
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return (*surface)->base.status;
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