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Fix runtime errors found by clang's sanitizer (#47082).

Browse Source 
* src/base/ftobjs.c (FT_Render_Glyph_Internal), src/base/ftoutln.c
(FT_Outline_Copy), src/cache/ftcsbits.c (ftc_sbit_copy_bitmap):
Properly handle empty input buffer.
This commit is contained in:
Werner Lemberg 2016-02-07 19:25:56 +01:00
parent 4c00dfb458
commit 0d053bac84
4 changed files with 20 additions and 6 deletions
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10
ChangeLog
View File

@ -1,3 +1,11 @@
2016-02-07 Werner Lemberg <wl@gnu.org>
Fix runtime errors found by clang's sanitizer (#47082).
* src/base/ftobjs.c (FT_Render_Glyph_Internal), src/base/ftoutln.c
(FT_Outline_Copy), src/cache/ftcsbits.c (ftc_sbit_copy_bitmap):
Properly handle empty input buffer.
2016-02-07 Werner Lemberg <wl@gnu.org>
[cff] Minor.
@ -76,7 +84,7 @@
(FT_Face_CheckTrueTypePatents, FT_Face_SetUnpatentedHinting):
Replace code with dummies.
* src/truetype/ttobjs.c (tt_face_init): Remove now defunct code.
* src/truetype/ttobjs.c (tt_face_init): Remove now defunct code.
* src/truetype/ttobjs.h (TT_GraphicsState): Remove `both_x_axis'
field.

3
src/base/ftobjs.c
View File

@ -4201,7 +4201,8 @@
MD5_Init( &ctx );
MD5_Update( &ctx, bitmap.buffer, rows * pitch );
if ( bitmap.buffer )
MD5_Update( &ctx, bitmap.buffer, rows * pitch );
MD5_Final( md5, &ctx );
FT_TRACE3(( "MD5 checksum for %dx%d bitmap:\n"

11
src/base/ftoutln.c
View File

@ -415,11 +415,14 @@
if ( source == target )
return FT_Err_Ok;
FT_ARRAY_COPY( target->points, source->points, source->n_points );
if ( source->n_points )
{
FT_ARRAY_COPY( target->points, source->points, source->n_points );
FT_ARRAY_COPY( target->tags, source->tags, source->n_points );
}
FT_ARRAY_COPY( target->tags, source->tags, source->n_points );
FT_ARRAY_COPY( target->contours, source->contours, source->n_contours );
if ( source->n_contours )
FT_ARRAY_COPY( target->contours, source->contours, source->n_contours );
/* copy all flags, except the `FT_OUTLINE_OWNER' one */
is_owner = target->flags & FT_OUTLINE_OWNER;

2
src/cache/ftcsbits.c vendored
View File

@ -53,6 +53,8 @@
pitch = -pitch;
size = (FT_ULong)pitch * bitmap->rows;
if ( !size )
return FT_Err_Ok;
if ( !FT_ALLOC( sbit->buffer, size ) )
FT_MEM_COPY( sbit->buffer, bitmap->buffer, size );