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[libpng16] Revised recent pngrutil.c patch as suggested by pascal

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Glenn Randers-Pehrson 2015-11-14 16:45:26 -06:00
parent 0b4e7deab1
commit 070a0eb58f
1 changed files with 2 additions and 2 deletions
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4
pngrutil.c
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@ -1670,7 +1670,7 @@ png_handle_sPLT(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
++entry_start;
/* A sample depth should follow the separator, and we should be on it */
if (length < 2 || entry_start > buffer + length - 2)
if (length < 2 || (size_t)(entry_start - buffer) > length - 2)
{
png_warning(png_ptr, "malformed sPLT chunk");
return;
@ -2174,7 +2174,7 @@ png_handle_pCAL(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
/* We need to have at least 12 bytes after the purpose string
* in order to get the parameter information.
*/
if (length < 12 || endptr <= buf + 12)
if (length < 12 || (size_t)(endptr - buf) <= 12)
{
png_chunk_benign_error(png_ptr, "invalid");
return;