maride/guacamole-spice-protocol
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Fix boundary overflow.

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This commit is contained in:
Michael Jumper 2012-04-10 21:40:05 -07:00
parent e659fca922
commit 79d388e0ec
1 changed files with 8 additions and 0 deletions
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8
protocols/rdp/src/rdp_glyph.c
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@ -207,6 +207,14 @@ void guac_rdp_glyph_enddraw(rdpContext* context,
cairo_surface_t* glyph_surface = guac_client_data->glyph_surface; cairo_surface_t* glyph_surface = guac_client_data->glyph_surface;
int stride = cairo_image_surface_get_stride(glyph_surface); int stride = cairo_image_surface_get_stride(glyph_surface);
/* Calculate bounds */
int max_width = cairo_image_surface_get_width(glyph_surface) - x;
int max_height = cairo_image_surface_get_height(glyph_surface) - y;
/* Ensure dimensions of glyph do not exceed bounds */
if (width > max_width) width = max_width;
if (height > max_height) height = max_height;
/* Ensure data is ready */ /* Ensure data is ready */
cairo_surface_flush(glyph_surface); cairo_surface_flush(glyph_surface);