AuroraMiddleware/harfbuzz
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cb65150fec
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205 Commits

Author SHA1 Message Date
Ebrahim Byagowi
cb65150fec
[draw] minor 2020-02-29 16:12:54 +03:30
Ebrahim Byagowi
86c40b3a1d [fuzz/draw] Call _get_glyph_extents 
Other render related APIs also may be added also later such
as ot-color and future rendering things.
 2020-02-29 14:53:34 +03:30
Michiharu Ariza
5ab50eebd7
collect_unicodes() with clamp, calling add_range() 
Use add_range instead an inner loop, clamp its input number by
number of glyphs a face has.

Even the face cmap12 and 13 have 32-bit hb_codepoint_t, which is here
used to make timeout, face's maxp has 16-bit gid limitation at least for now,
using that makes sure we both fix and the timeout and don't need to change
much things here also in order to support 32-bit gids also someday.

Fixes #2204
 2020-02-29 13:02:29 +03:30
Garret Rieger
410b4881d0 [subset] Add fuzzer timeout testcase. 2020-02-28 16:10:14 -08:00
Ebrahim Byagowi
e57ced5fc0
[gvar] Add other possibly fixed fuzzer case 
Speculatively should've been fixed by 61208401

https://crbug.com/oss-fuzz/20924 related
 2020-02-28 23:29:05 +03:30
Ebrahim Byagowi
758fda728b
[glyf] Don't accept gids higher than maxp's glyphs number 
This specially becomes concerning on sub-components where a gvar table
that is sanitized using maxp's glyphs number overflows when a high gid
accepted here goes to it, maybe an additional check can be put there
also, this however feels to be enough.

Fixes https://crbug.com/oss-fuzz/20944
 2020-02-28 23:19:06 +03:30
Ebrahim Byagowi
e90213868b Revert "collect_unicodes() to check gid < num_glyphs with cmap 12" 
Didn't fix the case actually, making bots to fail.

This reverts commit 15b43a4104.
 2020-02-28 21:24:51 +03:30
Ebrahim Byagowi
61208401f4
[gvar] Use hb_bytes_t.check_range instead having in house one 
And use TupleVarHeader calculated size for validity check.

Fixes https://crbug.com/oss-fuzz/20919 and possibly other gvar related issues
 2020-02-28 21:09:07 +03:30
Michiharu Ariza
15b43a4104
collect_unicodes() to check gid < num_glyphs with cmap 12 
fixes #2204
 2020-02-28 20:15:39 +03:30
Ebrahim Byagowi
868ecf7b26 [draw] Add fuzzer runner 2020-02-28 19:57:56 +03:30
Ebrahim Byagowi
8eba66c1c6 [gvar] Fix invalid memory access by refactoring GlyphVarData fetch logic 
Fixes https://crbug.com/oss-fuzz/20906
 2020-02-27 20:26:54 +03:30
ariza
a99134c5be add oss-fuzz 20886 test file 2020-02-26 09:58:03 -08:00
Ebrahim Byagowi
1b8b863898 minor 2020-02-26 16:36:48 +03:30
Ebrahim Byagowi
132fcfbc47 [fuzz] minor don't abort main.cc when the file was empty or not found 2020-02-26 16:15:17 +03:30
Ebrahim Byagowi
84163c83d3 [draw] Skip commands and paths not contributing anything 
They aren't contributing to rendering and making issue for stroking, let's skip them
ourselves as Skia does also https://skia-review.googlesource.com/c/skia/+/268166

They are useful for extracting extents and so which that functionality won't be effected by this change.
 2020-02-26 16:09:28 +03:30
Ebrahim Byagowi
152000d9c7 [fuzz] Practice variations on font object 2020-02-25 21:16:57 +03:30
Ebrahim Byagowi
036d868913 [draw] Add a fuzzer 
Specially checks correctness of the API semantics:
* no move happens when a path is already opened with move-to.
* no path will be left open and close-path will happen at the end of opened paths.
* no path opens with a move-to and will be closed with no length.
* paths start and ending points matches.
* no line/quadratic/cubic command will be issued when no path is started.
 2020-02-25 19:09:44 +03:30
Ebrahim Byagowi
96b71e802f [fuzz] make the custom loader to handle multiple files 
Actually this was the way it used to work :)
 2020-02-24 23:01:02 +03:30
Ebrahim Byagowi
8d19907704 Remove python2 support from tests/utils scripts 2020-02-19 16:17:45 +03:30
Ebrahim Byagowi
a94d1af193 [fuzz] minor style fixes 2020-02-12 19:30:31 +03:30
Ebrahim Byagowi
1c015d3e9f [fuzz] minor fuzzer case move, oops 2020-02-12 19:19:37 +03:30
Ebrahim Byagowi
49341faee2 [fuzz] minor, move two fuzzer cases to their correct place 2020-02-12 19:17:18 +03:30
Ebrahim Byagowi
97229244eb [fuzzer] Fix hb-set-fuzzer minor overflow issue 
Size shouldn't be smaller than the struct not its pointer size.

Fixes https://crbug.com/oss-fuzz/20655
 2020-02-12 15:41:51 +03:30
Garret Rieger
7b42403c1c Add explicit values to the set fuzzer enums. 2020-02-11 13:25:44 -08:00
Garret Rieger
e805923310 Add a few basic seeds for the set fuzzer. 2020-02-11 13:25:44 -08:00
Ebrahim Byagowi
ff984ed3cd Use multiplication to avoid undefined behaviour per clang 
Newer versions of MSVC with /we4146 don't like putting negative sign behind a
unsigned number as https://github.com/harfbuzz/harfbuzz/pull/2069
That however have made https://crbug.com/1050424 this complain:
  src/hb-ot-color-sbix-table.hh:304:28: runtime error: negation of -2147483648 cannot be represented in type 'int';
                                        cast to an unsigned type to negate this value to itself
which apparently can be fixed using this change.

Let's see if this won't make another ubsan complain!
 2020-02-11 19:51:52 +03:30
Garret Rieger
bca9bc6b92 Add hb-set-fuzzer. 
It fuzzes all of the hb_set process methods (intersection, subtraction, union, and symmetric difference).
 2020-02-11 03:08:39 +03:30
ckitagawa
e128f80278 parent 777ba47b50 
author ckitagawa <ckitagawa@chromium.org> 1579631743 -0500
committer ckitagawa <ckitagawa@chromium.org> 1580506176 -0500

[subset] Add CBLC support
 2020-01-31 16:37:30 -05:00
ckitagawa
ed857c4680 [subset] Add COLR support 2020-01-28 15:35:53 -05:00
Ebrahim Byagowi
5897697250
[test] Increase subset timeout 
No random timeout please
 2020-01-25 00:32:46 +03:30
ckitagawa-work
0e4b2676bd [subset] sbix fix missed offset is_null() check 2020-01-24 20:46:07 +03:30
ckitagawa
7dc341fe74 [subset] Fix UBSAN issue in sbix 2020-01-23 23:46:22 +03:30
ariza
1ab3924b31 refix PR #2087 subset PairPos1 
also added oss-fuzz 20211 data fixed by this
 2020-01-23 10:50:52 -08:00
ckitagawa
b18cb5b5ee Add second fixed test 2020-01-22 10:11:15 -08:00
ckitagawa
8614a30bc9 [subset] Fix sbix fuzz problem 2020-01-22 10:11:15 -08:00
ckitagawa
6bcf57eaa3 Simplify copy and add fuzzing coverage 2020-01-15 13:36:01 -08:00
Ebrahim Byagowi
dc03a993d0
Fix collect lookups logic of FeatureTableSubstitution (#2097) 
https://crbug.com/oss-fuzz/20036
 2020-01-12 14:21:29 +03:30
Ebrahim Byagowi
a32ecc15ae
Fix collect lookups logic of FeatureVariationRecord 
As "Offset to a feature table substitution table, from beginning of the FeatureVariations table."
from https://docs.microsoft.com/en-us/typography/opentype/spec/chapter2 the record should
match its sanitize logic not the reverse way.

Fixes https://crbug.com/oss-fuzz/20021 and https://crbug.com/oss-fuzz/20022
 2020-01-11 15:37:24 +03:30
Michiharu Ariza
d2ab1ec65b fixes oss-fuzz 19978: Null-dereference READ (#2091) 2020-01-10 07:54:16 +03:30
Ebrahim Byagowi
257a197ae7
Fail serialize when map has incorrect value 
fixes https://crbug.com/oss-fuzz/19956

am not super happy with the fix, guess we should do some check
before the memcpy anyway as @blueshade7 thinks also,
so let's have it or revert it when we have a better approach for the case.
 2020-01-09 22:55:45 +03:30
Ebrahim Byagowi
8ed46c3678
[fuzz] minor, add another already fixed case 
https://crbug.com/oss-fuzz/19907
 2020-01-07 23:43:53 +03:30
Ebrahim Byagowi
341407f7a5
[fuzz] minor, upload another fixed case 
https://crbug.com/oss-fuzz/19878
 2020-01-07 09:10:24 +03:30
Ebrahim Byagowi
7950beecfc
[subset] Fix null pointer dereference in hvar/vvar subset (#2085) 
Rest of the code assumes there is at least one subtable, lets return here if not.

* https://crbug.com/oss-fuzz/19827
* https://crbug.com/oss-fuzz/19847
 2020-01-06 21:25:00 +03:30
Ebrahim Byagowi
64a45be519
[ubsan] Don't decrease pointer if match_glyph_data is null (#2048) 
Similar to fix on https://github.com/harfbuzz/harfbuzz/pull/2022

Fixes https://crbug.com/1023070
 2019-11-09 12:25:33 +03:30
Ebrahim Byagowi
84b86a12d9
[fuzz] Remove just added case 
It didn't fail locally but on bots causing timeout, let remove for now.
 2019-11-06 09:22:34 +03:30
Ebrahim Byagowi
a8f049c9a1
[fuzz] Upload testcase of https://crbug.com/oss-fuzz/18529 
Apparently false alarm per last comment and was ok locally also but lets have it here also
 2019-11-05 22:26:36 +03:30
Qunxin Liu
defe9b6da0 crash fix : Heap-buffer-overflow READ 2 
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18513
 2019-10-25 13:09:47 -07:00
Qunxin Liu
b2fcca6e14 fuzzer crash fix 
https://oss-fuzz.com/testcase-detail/5643107869917184
 2019-10-24 16:11:30 -07:00
Ebrahim Byagowi
9815ca0338 [ci] Use custom subset fuzzer timeout for failing sanitizer bots 2019-10-25 00:16:23 +03:30
Garret Rieger
95ab110cd9 Optimize intersects_array to fix fuzzer timeout. 2019-10-22 13:33:50 -07:00