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[libpng17] Removed potentially misleading warning from png_check_IHDR().

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This commit is contained in:
Glenn Randers-Pehrson 2014-01-10 06:22:41 -06:00
parent 441de8f4fd
commit 03a53fa429
3 changed files with 2 additions and 15 deletions
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3
ANNOUNCE
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@ -487,8 +487,7 @@ Version 1.7.0beta26 [January 1, 2014]
rearrangement of Makefile.am allow creation of these links to be disabled.
Version 1.7.0beta27 [January 10, 2014]
Revised png_check_IHDR() to use PNG_SIZE_MAX instead of PNG_UINT_32_MAX
in the test for potential overflow in PNG_ROWBYTES.
Removed potentially misleading warning from png_check_IHDR().
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

3
CHANGES
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@ -4776,8 +4776,7 @@ Version 1.7.0beta26 [January 1, 2014]
rearrangement of Makefile.am allow creation of these links to be disabled.
Version 1.7.0beta27 [January 10, 2014]
Revised png_check_IHDR() to use PNG_SIZE_MAX instead of PNG_UINT_32_MAX
in the test for potential overflow in PNG_ROWBYTES.
Removed potentially misleading warning from png_check_IHDR().
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

11
png.c
View File

@ -2381,17 +2381,6 @@ png_check_IHDR(png_const_structrp png_ptr,
error = 1;
}
/* Check for potential overflow in PNG_ROWBYTES calculation */
if (error == 0 && width > (PNG_SIZE_MAX
>> 3) /* 8-byte RGBA pixels */
- 48 /* bigrowbuf hack */
- 1 /* filter byte */
- 7*8 /* rounding of width to multiple of 8 pixels */
- 8 /* extra max_pixel_depth pad */
- error) /* to prevent always-false compiler warning */
png_warning(png_ptr,
"Width may be too large for libpng to process pixels");
/* Check other values */
if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
bit_depth != 8 && bit_depth != 16)