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[libpng15] Fix an off-by-one error in the palette index checking function.

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Glenn Randers-Pehrson 2012-03-10 20:14:23 -06:00
parent 1ca16d92f2
commit d4247dd398
3 changed files with 6 additions and 4 deletions
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5
ANNOUNCE
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@ -1,5 +1,5 @@
Libpng 1.5.10beta05 - March 10, 2012 Libpng 1.5.10beta05 - March 11, 2012
This is not intended to be a public release. It will be replaced This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version. within a few weeks by a public version or by another test version.
@ -56,9 +56,10 @@ Version 1.5.10beta04 [March 10, 2012]
Fixed CMF optimization of non-IDAT compressed chunks, which was added at Fixed CMF optimization of non-IDAT compressed chunks, which was added at
libpng-1.5.4. It sometimes produced too small of a window. libpng-1.5.4. It sometimes produced too small of a window.
Version 1.5.10beta05 [March 10, 2012] Version 1.5.10beta05 [March 11, 2012]
Reject all iCCP chunks after the first, even if the first one is invalid. Reject all iCCP chunks after the first, even if the first one is invalid.
Issue a png_benign_error() instead of png_warning() about bad palette index. Issue a png_benign_error() instead of png_warning() about bad palette index.
Fix an off-by-one error in the palette index checking function.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net: Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
(subscription required; visit (subscription required; visit

3
CHANGES
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@ -3841,9 +3841,10 @@ Version 1.5.10beta04 [March 10, 2012]
Fixed CMF optimization of non-IDAT compressed chunks, which was added at Fixed CMF optimization of non-IDAT compressed chunks, which was added at
libpng-1.5.4. It sometimes produced too small of a window. libpng-1.5.4. It sometimes produced too small of a window.
Version 1.5.10beta05 [March 10, 2012] Version 1.5.10beta05 [March 11, 2012]
Reject all iCCP chunks after the first, even if the first one is invalid. Reject all iCCP chunks after the first, even if the first one is invalid.
Issue a png_benign_error() instead of png_warning() about bad palette index. Issue a png_benign_error() instead of png_warning() about bad palette index.
Fix an off-by-one error in the palette index checking function.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit (subscription required; visit

2
pngtrans.c
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@ -635,7 +635,7 @@ png_do_check_palette_indexes(png_structp png_ptr, png_row_infop row_info)
* forms produced on either GCC or MSVC. * forms produced on either GCC or MSVC.
*/ */
int padding = (-row_info->pixel_depth * row_info->width) & 7; int padding = (-row_info->pixel_depth * row_info->width) & 7;
png_bytep rp = png_ptr->row_buf + 1 + row_info->rowbytes; png_bytep rp = png_ptr->row_buf + row_info->rowbytes;
switch (row_info->bit_depth) switch (row_info->bit_depth)
{ {