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[libpng16] Fixed off-by-one error in png_do_check_palette_indexes() (Bug report

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by Mick P., Source Forge Issue #269).
This commit is contained in:
Glenn Randers-Pehrson 2017-08-28 11:58:11 -05:00
parent 321c24b0d7
commit d2b9af04ac
3 changed files with 5 additions and 1 deletions
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2
ANNOUNCE
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@ -27,6 +27,8 @@ Changes since the last public release (1.6.32):
Added PNGMINUS_UNUSED macro to contrib/pngminus/p*.c and added missing
parenthesis in contrib/pngminus/pnm2png.c (bug report by Christian Hesse).
Free row_ptr in PNG_CLEANUP macro in contrib/oss-fuzz/libpng_read_fuzzer.cc
Fixed off-by-one error in png_do_check_palette_indexes() (Bug report
by Mick P., Source Forge Issue #269).
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

2
CHANGES
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@ -5998,6 +5998,8 @@ Version 1.6.33beta01 [August 28, 2017]
Added PNGMINUS_UNUSED macro to contrib/pngminus/p*.c and added missing
parenthesis in contrib/pngminus/pnm2png.c (bug report by Christian Hesse).
Free row_ptr in PNG_CLEANUP macro in contrib/oss-fuzz/libpng_read_fuzzer.cc
Fixed off-by-one error in png_do_check_palette_indexes() (Bug report
by Mick P., Source Forge Issue #269).
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

2
pngtrans.c
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@ -708,7 +708,7 @@ png_do_check_palette_indexes(png_structrp png_ptr, png_row_infop row_info)
* forms produced on either GCC or MSVC.
*/
int padding = PNG_PADBITS(row_info->pixel_depth, row_info->width);
png_bytep rp = png_ptr->row_buf + row_info->rowbytes;
png_bytep rp = png_ptr->row_buf + row_info->rowbytes - 1;
switch (row_info->bit_depth)
{