918193ebf9
[subset] fix a class of fuzzer timeouts caused by large shared coverage tables.
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More acurately estimates the op count for CoverageFormat2 tables as the population size instead of the size in bytes.
2023-02-22 16:57:39 -07:00
64fa5cd482
[GPOS] Fix assert fail introduced recently
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Was introduced in 8708b9e081https://oss-fuzz.com/testcase-detail/6377756666757120
2023-02-07 15:52:53 -07:00
e4fff64ce3
[repacker] check duplicate() for success.
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Fixes fuzzer testcase https://oss-fuzz.com/testcase-detail/5475787333828608 .
2023-01-23 18:37:13 -07:00
b63159e8bf
[PairPosFormat1] Fix stride
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Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=55287
and generally the lookup with MediumTypes.
2023-01-21 15:51:40 -07:00
3c972867b9
More s/hb_font_get_glyph_shape/hb_font_draw_glyph/
2022-12-23 13:37:59 -07:00
4622be7f84
test/fuzzing: Fix dist
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We need to dist the repacker fuzzer test items into the tarball, along
with the items in graphs/ and sets/.
2022-12-22 06:44:04 -07:00
40342c9437
[subset] check for addition overflow in hdmx size calculation.
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Fixes https://oss-fuzz.com/testcase-detail/4877336988483584 .
2022-12-21 16:44:06 -07:00
b5acde43ed
[subset] check pending/subsetted tag sets for alloc failure.
2022-12-13 15:31:40 -07:00
35233d2514
[repacker] fix fuzzer reported stack overflow.
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Fixes https://oss-fuzz.com/testcase-detail/6014493291577344 .
2022-12-07 10:32:56 -07:00
b17fbc200b
[repacker] use memcpy to avoid alignment issues.
2022-12-05 14:13:47 -07:00
f1d3489388
[repacker] bail on failure to alloc assigned_bytes set.
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Fixes fuzzer issue https://oss-fuzz.com/testcase-detail/5390364397928448 .
2022-12-05 14:13:47 -07:00
239a5aca02
[repacker] don't allow references to the null object in graph.
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Fixes fuzzer issue https://oss-fuzz.com/testcase-detail/6714085985353728
2022-12-05 14:13:47 -07:00
16f61a1c87
[repacker] only build repacker fuzzer when experimental api is enabled.
2022-12-02 00:02:14 +00:00
de5a621322
[repacker] enforce root node having no incoming edges.
2022-12-01 23:37:16 +00:00
30e405e470
[repacker] ensure link obj indices are valid.
2022-12-01 22:12:59 +00:00
554ed06fac
[repacker] add cycle detection to the graph sort.
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This allows us to bail early if the graph is not acyclic.
2022-12-01 21:52:37 +00:00
9e99d08470
[repacker] validate link widths during repacker setup.
2022-12-01 20:17:41 +00:00
edf7a29595
[repacker] Validate link positions before running the repacker.
2022-12-01 20:17:41 +00:00
88d437525f
[repacker] add test for repacker fuzzer.
2022-12-01 20:17:40 +00:00
6627a1ab45
[repacker] Add a initial seed for the fuzzer repacker.
2022-12-01 20:17:40 +00:00
deca30b268
[repacker] get repacker fuzzer working.
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Additionally add helper method that allows a graph to be saved as a fuzzer seed.
2022-12-01 20:17:40 +00:00
261a605f9c
[repacker] verify graph is a dag before using the fuzzer input.
2022-12-01 20:17:40 +00:00
985b19f678
[repacker] begin implementing a fuzzer for the repacker api.
2022-12-01 20:17:39 +00:00
dd1ba328a8
[repacker] fix fuzzer timeout.
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For https://oss-fuzz.com/testcase-detail/5845846876356608 . Only process the set of unique overflows.
2022-11-21 16:24:48 -07:00
e854739b2d
[fuzzing] Add test font for previous commit
2022-10-26 13:12:56 -06:00
7fde6ab025
fuzzer fix: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=49790
2022-08-05 15:10:31 -06:00
afe6629b2f
Fix make dist
2022-08-03 19:56:29 +02:00
e68e874da6
Update test/fuzzing/README
2022-08-03 11:31:34 -06:00
bdbb8c297e
Add test for previous commit
2022-07-29 12:04:28 -06:00
e2cc34e190
[subset/GPOS] Fix a fuzzer timeout test
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Fixes https://oss-fuzz.com/testcase-detail/5234369031176192
2022-07-26 12:31:40 -06:00
4cb83967aa
[subset/ClassDefFormat2] Fix timeout
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Fixes https://oss-fuzz.com/testcase-detail/5417800474165248
2022-07-23 11:00:20 -06:00
32c85b8c8c
[avar2] Fix mapping when coords length don't match
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Ouch.
Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=49407
2022-07-23 10:50:26 -06:00
9eab3ac72d
[CoverageFormat2] Remove hand-written loop
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While on a fuzzer-found test case (added) that loop was faster,
on real fonts, including NotoNastaliq in our benchmark, it was
actually slower, which intuitively I would have expected.
Still no idea why on that fuzzer case it's faster though. :(
2022-07-21 12:36:53 -06:00
3c84aa8416
[cff] Add a max work counter
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Set to 10,000 per interpretation right now.
Fixes https://github.com/harfbuzz/harfbuzz/issues/3700
Fixes https://oss-fuzz.com/testcase-detail/5667125715927040
2022-07-18 13:57:59 -06:00
b8c7c0a0e6
[fuzzer] In 50% of runs don't fail the allocator
2022-07-01 15:25:09 -06:00
311413f16b
[subset] Fix fuzzer issue.
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Fixes https://oss-fuzz.com/testcase-detail/5693568490012672 . new_index should be set from new_index2 when the entry is present in the map.
2022-06-14 17:49:13 +01:00
62e803b361
[sbix] Limit glyph extents
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Fixes https://github.com/harfbuzz/harfbuzz/issues/3557
2022-06-01 07:39:20 -06:00
5a058ba158
[shape-fuzzer] Add commented out more buffer-verify option
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Those currently fail and I've been unable to debug them.
I tried two, passing them to hb-shape doesn't reproduce the failure. :(
2022-06-01 04:53:50 -06:00
189f65344a
[fuzz-shape] Verify shape output
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Let the fuzzers loose on shape verify.
2022-06-01 04:53:50 -06:00
8f9f0c494b
[subset] Enforce cmap12 group ordering constraints in collect_mapping.
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Fixes fuzzer issue: https://oss-fuzz.com/testcase-detail/6365271012540416
2022-05-10 12:15:09 -06:00
b051f3fa83
[subset] Fix cpal subsetting when there are partial palette overlaps.
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The existing code doesn't correctly handle the case where palettes partially overlap in the color record array. This changes the subsetting to only share entries in the color record array when palettes have the same first color index. Partially overlapping palettes will be converted to disjoint segments in the color record array.
Updates one of the color tests to use multiple palettes.
Also fixes fuzzer: https://oss-fuzz.com/testcase-detail/5568200165687296 .
2022-05-09 12:25:05 -06:00
ca8a0f3ea3
[gvar] Protect against out-of-range access
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Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=47281
Fixes https://oss-fuzz.com/testcase-detail/5508865908670464
2022-05-06 11:54:38 -06:00
a665e29ed7
[use] Avoid O(n^2) in the machine
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Fixes https://github.com/harfbuzz/harfbuzz/issues/3502
2022-03-25 15:17:55 -06:00
03085132ba
[buffer] Fix out-buffer under memory-alloc failure
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This was broken in July refactoring of the buffer, and exposed to
ReverseChainSingleSubstFormat1 in 3807061d63https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=38800
https://bugs.chromium.org/p/chromium/issues/detail?id=1303552
2022-03-21 18:09:06 -06:00
151f205819
[draw] Emit move_to immediately, like other operators
2022-02-13 13:21:15 -06:00
f1a9a9ccaf
[draw-state] Pass state down to callbacks
2022-02-13 13:21:14 -06:00
1740916ede
[draw] Remove check for no-op
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This is unnecessary overhead. Up to rasterizers to handle this. Plus,
this throws off point-numbers in uses that rely on it.
Disabled one test that broke with this.
2022-02-13 13:21:14 -06:00
8b4f429000
[draw] Virtualize hb_font_draw_glyph() into hb_font_get_glyph_shape()
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To be implemented in hb-ft.
2022-02-13 13:21:14 -06:00
2bed4f46fb
[draw] Fix draw signatures
2022-02-13 13:21:14 -06:00
08e1096609
[draw-fuzzer] Fix signatures
2022-02-13 13:21:14 -06:00
Garret Rieger
Behdad Esfahbod
Chun-wei Fan
Qunxin Liu
Khaled Hosny