Commit Graph

286 Commits

Author SHA1 Message Date
Ebrahim Byagowi 57b7de032f [subset] Fail ClassDefFormat1 serialization if no space available
Fixes https://crbug.com/oss-fuzz/21580
2020-04-05 17:38:04 +04:30
Garret Rieger 014e038b2c [subset] Bail out of context lookup expansion once the lookup limit is encountered. 2020-04-01 11:14:41 +04:30
Garret Rieger 5d345d0cd1 [subset] Limit the number of lookup indices processed subsetting Feature.
> Also, remove two unnessecary full iterations of the lookup index iterator during serialization of the index array. Fixes fuzzer found timeout.
2020-04-01 11:13:05 +04:30
Ebrahim Byagowi 96d792ae80 [avar] Prevent mul overflow
Fixes https://crbug.com/oss-fuzz/21350
2020-03-26 15:01:14 +00:00
Garret Rieger 4ad686b9c0
[subset] fix fuzzer timeout in layout closure
Bail out of chain context lookup expansion once the lookup limit is encountered.
2020-03-26 06:32:28 +00:00
Ebrahim Byagowi 7054b12206 [meson] Mark rest of non-install executables explicitly 2020-03-24 19:06:09 +00:00
Ebrahim Byagowi 600bf21fbc [meson] Add draw-fuzzer runner 2020-03-24 19:06:09 +00:00
Ebrahim Byagowi 28deb6b718 [meson] test/fuzzing simplify 2020-03-24 19:06:09 +00:00
Ebrahim Byagowi 78622231ac [meson] More comment on tests are causing timeout failure 2020-03-24 19:06:09 +00:00
Ebrahim Byagowi d57fc627e9 [meson] raise timeout value of subset fuzzer 2020-03-24 19:06:09 +00:00
Ebrahim Byagowi 761695264b [tests] Remove py2 workaround for lack of timeout in subprocess 2020-03-19 10:32:46 +00:00
Ebrahim Byagowi b5526a09ff [tools] Remove in-house 'which' now that we have py3 2020-03-19 10:32:46 +00:00
Garret Rieger 430bf69653 Add potentially crashing font as a fuzzer seed. 2020-03-14 00:55:47 +03:30
Ebrahim Byagowi 755a77d660 Move outline draw API behind HB_EXPERIMENTAL_API directive 2020-03-13 08:25:53 +03:30
Garret Rieger 834a224a50
[subset] Put a limit on the number of lookup indices that can be visited during closures
Fixes https://crbug.com/oss-fuzz/21025
2020-03-12 13:32:36 +03:30
Ebrahim Byagowi c494d7abcd Remove cmake testing and add meson build bot
CMake tests are broken anyway as py3 changes so let's get rid of them
2020-03-11 20:15:10 +03:30
Ebrahim Byagowi 1c3f80ba13 [meson] Minor updates 2020-03-11 20:15:10 +03:30
Khaled Hosny 04438554c8 meson: Update build files after rebase 2020-03-11 19:18:57 +03:30
Tim-Philipp Müller 618584e923 meson: rename incbase to incconfig
Makes it clearer what it's for: config.h. See #4.
2020-03-11 19:18:57 +03:30
Mathieu Duponchelle d4a7237327 meson: all tests passing on Windows / MSVC 2020-03-11 19:18:57 +03:30
Mathieu Duponchelle 7ee650b173 meson: refactor fuzzing test 2020-03-11 19:18:57 +03:30
Mathieu Duponchelle 920efc0ef7 Add Meson build definitions
Fixes #490

http://mesonbuild.com
2020-03-11 19:18:57 +03:30
Ebrahim Byagowi 0d729b4b72 [avar] Fix out-of-bound read when input is bigger than all the coords
'i' shouldn't become equal to array's length which as the increament
is happened at end of the loop, if the input is bigger than all the
table coords, it will be equal to array's length.

Fixes https://crbug.com/oss-fuzz/21092
2020-03-07 13:20:41 +03:30
Ebrahim Byagowi 446d1e3bbc [fuzz] Add more of fixed cases 2020-03-05 00:49:03 +03:30
Ebrahim Byagowi 99b5b3f1b1 [gvar] Make sure TupleVarHeader has the needed size
Fixes https://crbug.com/oss-fuzz/21026
2020-03-04 12:43:26 +03:30
Ebrahim Byagowi 558f922788 [fuzz] Avoid empty memcpy and ubsan complain by length checking before memcpy 2020-03-03 21:39:22 +03:30
Ebrahim Byagowi 6543d166fd [fuzz] Remove the not yet fixed timeout, going to investigate 2020-03-03 21:39:22 +03:30
Ebrahim Byagowi 2bbf1c8673 [fuzz] Add more of supposed to already be fixed cases from Chromium bug tracker 2020-03-03 21:39:22 +03:30
Ebrahim Byagowi f253f06cf3 [fuzz] Add another fixed case
https://crbug.com/oss-fuzz/14626

another numerous subtables count which is fixed by d38360397
2020-03-03 19:12:04 +03:30
Ebrahim Byagowi d383603976
Limit OT::Lookup subtables (#2219)
Fixes https://crbug.com/oss-fuzz/13943
2020-03-02 22:41:08 +03:30
Ebrahim Byagowi 29efd964f2
[fuzz] Add cases that marked as wontfix
Let's see if they were really false alarms, if so, let's just have them.
2020-03-02 14:22:29 +03:30
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
Qunxin Liu b33a0d628e fuzzer crash fix: Null-dereference WRITE
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18363
2019-10-22 01:01:08 +03:30
Ebrahim Byagowi e766783152 [fuzz] Add https://crbug.com/oss-fuzz/17898 testcase 2019-10-21 22:17:06 +03:30
Garret Rieger 831daf4c76 Enforce HB_MAX_LANGSYS limit during layout subsetting. 2019-10-18 15:10:30 -07:00
Ebrahim Byagowi 0665dce116 [fuzzer] Don't process output in debug mode as it causes timeout 2019-09-21 17:36:33 +04:30
Ebrahim Byagowi d3b984d379 Revert in-house pow10 (d80a3ea) and fix oss-fuzz/16922
Probably can be fixed but merging it was wrong so let's revert.
2019-09-02 18:28:03 +04:30
Ebrahim Byagowi 875985cd48
[subset] Don't allow malicious fonts to insert unlimited table headers
Fixes https://crbug.com/oss-fuzz/16810
2019-08-29 14:51:22 +04:30
Ebrahim Byagowi 269a120f13
[subset] Raise the bar in new vs old table size
https://crbug.com/oss-fuzz/16740

This is actually an interesting thing that {h,v}mtx allocates as
much as a font pretends to have glyphs but the solution is not
that obvious as regular fonts can have less than actually containing
metrics in their {h,v}mtx. This change raises the bar to consider this
hmtx 4 byte for every glyph case.

Initially we wanted to just find things allocating crazy amount of
memory but having the assert has led to interesting findings also
so let's don't remove the assert and see what we can find elsewhere.
2019-08-25 20:37:00 +04:30
Ebrahim Byagowi 28aba780c4 [subset] Fix blob leak of _subset2 when returns early
Fixes https://crbug.com/oss-fuzz/16639
2019-08-24 16:11:21 +04:30
Ebrahim Byagowi b31d627f15
Increase subset fuzzer timeout to 16s
To satisfy -valgrind and -tsan bots, very ugly
2019-08-11 23:34:48 +04:30
Ebrahim Byagowi e21bdf500d
Increase subset fuzzer timeout to 8s
Probably we should just remove timeout when running tsan and vaglrind here, the flaky bots
2019-07-28 22:59:09 +04:30
Ebrahim Byagowi bdfdac0f26
[ci][fuzzer] print valgrind failure if an error happened 2019-07-19 10:33:00 +04:30
Ebrahim Byagowi f8242b61ab
[fuzz] Increase subset runner timeout for tsan bot
Now is flaky let's just increase and maybe investigate later
2019-07-11 15:10:36 +04:30
Ebrahim Byagowi b65bad18aa
[fuzz] Don't fail when blob is empty
And enable more tests able to trig the issue.
2019-07-11 14:31:55 +04:30
Ebrahim Byagowi c85f624b51 Force blob generation and memory check in hb-subset-fuzzer 2019-07-10 23:38:07 +04:30
Michiharu Ariza 8341c0b304 add test case file 2019-06-27 08:43:31 -07:00
Michiharu Ariza 90872a29ee change assert(false) to failure 2019-06-11 12:42:28 -07:00
Michiharu Ariza 65e66a2d37 added test data 2019-06-03 16:31:41 -07:00
Bruce Mitchener 5846884f86 test: Use nullptr in C++ code. (#1744) 2019-06-03 12:30:25 +04:30
Qunxin Liu e1a5ce6aa6 Fix fuzzer crash testcase
Add a check for stringOffSet(uint16) overflow,
return early if overflow happens
2019-05-24 15:26:20 -04:00