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* src/sfnt/sfwoff2.c (reconstruct_font): Fix memory leak.

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Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=17812
This commit is contained in:
Werner Lemberg 2019-09-30 07:41:57 +02:00
parent 12696dcf9b
commit 839a023619
2 changed files with 18 additions and 10 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2019-09-30 Werner Lemberg <wl@gnu.org>
* src/sfnt/sfwoff2.c (reconstruct_font): Fix memory leak.
Reported as
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=17812
2019-09-30 Werner Lemberg <wl@gnu.org>
[woff2] Reject fonts without `head' table.

20
src/sfnt/sfwoff2.c
View File

@ -1534,7 +1534,7 @@
/* Create a stream for the uncompressed buffer. */
if ( FT_NEW( stream ) )
return FT_THROW( Invalid_Table );
goto Fail;
FT_Stream_OpenMemory( stream, transformed_buf, transformed_buf_size );
FT_ASSERT( FT_STREAM_POS() == 0 );
@ -1554,16 +1554,16 @@
(FT_Char)( table.Tag ) ));
if ( FT_STREAM_SEEK( table.src_offset ) )
return FT_THROW( Invalid_Table );
goto Fail;
if ( table.src_offset + table.src_length > transformed_buf_size )
return FT_THROW( Invalid_Table );
goto Fail;
/* Get stream size for fields of `hmtx' table. */
if ( table.Tag == TTAG_hhea )
{
if ( read_num_hmetrics( stream, &num_hmetrics ) )
return FT_THROW( Invalid_Table );
goto Fail;
}
info->num_hmetrics = num_hmetrics;
@ -1575,7 +1575,7 @@
if ( table.Tag == TTAG_head )
{
if ( table.src_length < 12 )
return FT_THROW( Invalid_Table );
goto Fail;
buf_cursor = transformed_buf + table.src_offset + 8;
/* Set checkSumAdjustment = 0 */
@ -1590,7 +1590,7 @@
if ( WRITE_SFNT_BUF( transformed_buf + table.src_offset,
table.src_length ) )
return FT_THROW( Invalid_Table );
goto Fail;
}
else
{
@ -1611,7 +1611,7 @@
&dest_offset,
info,
memory ) )
return FT_THROW( Invalid_Table );
goto Fail;
FT_TRACE4(( "Checksum = %09x.\n", checksum ));
}
@ -1625,7 +1625,7 @@
if ( !is_glyf_xform )
{
if ( get_x_mins( stream, indices, num_tables, info, memory ) )
return FT_THROW( Invalid_Table );
goto Fail;
}
table.dst_offset = dest_offset;
@ -1639,13 +1639,13 @@
sfnt_size,
&dest_offset,
memory ) )
return FT_THROW( Invalid_Table );
goto Fail;
}
else
{
/* Unknown transform. */
FT_ERROR(( "Unknown table transform.\n" ));
return FT_THROW( Invalid_Table );
goto Fail;
}
}