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[truetype]: Limit `SLOOP' bytecode argument to 16 bits. 

This fixes

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7707

* src/truetype/ttinterp.c (Ins_SLOOP): Do it.
This commit is contained in:
Werner Lemberg 2018-04-15 21:55:04 +02:00
parent 827ca3bcf2
commit 235b1e2fe6
2 changed files with 14 additions and 1 deletions
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10
ChangeLog
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@ -1,3 +1,13 @@
2018-04-15 Werner Lemberg <wl@gnu.org>
[truetype]: Limit `SLOOP' bytecode argument to 16 bits.
This fixes
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7707
* src/truetype/ttinterp.c (Ins_SLOOP): Do it.
2018-04-14 Werner Lemberg <wl@gnu.org>
[truetype] Integer overflow issues.

5
src/truetype/ttinterp.c
View File

@ -3289,7 +3289,10 @@
if ( args[0] < 0 )
exc->error = FT_THROW( Bad_Argument );
else
exc->GS.loop = args[0];
{
/* we heuristically limit the number of loops to 16 bits */
exc->GS.loop = args[0] > 0xFFFFL ? 0xFFFFL : args[0];
}
}