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Bug 392411 - APNG decoder does not detect width+offset too large, patch by Glenn Randers-Pehrson <glennrp@gmail.com>, r=asmith15, sr+a1.9=pavlov

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This commit is contained in:
philringnalda@gmail.com 2007-08-17 21:42:09 -07:00
parent d90d948a45
commit 531b341521
1 changed files with 3 additions and 3 deletions
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6
modules/libimg/png/pngset.c
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@ -1082,9 +1082,9 @@ png_ensure_fcTL_is_valid(png_structp png_ptr,
png_uint_16 delay_num, png_uint_16 delay_den,
png_byte dispose_op, png_byte blend_op)
{
if (width > png_ptr->first_frame_width ||
height > png_ptr->first_frame_height)
png_error(png_ptr, "width and/or height for a frame greater than"
if (width + x_offset > png_ptr->first_frame_width ||
height + y_offset > png_ptr->first_frame_height)
png_error(png_ptr, "dimensions of a frame are greater than"
"the ones in IHDR");
if (width > PNG_UINT_31_MAX)
png_error(png_ptr, "invalid width in fcTL (> 2^31-1)");