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de1b51ed
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2021-02-22T12:25:29
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Improve HTML fuzzer stability
Call htmlInitAutoClose during fuzzer initialization to fix stability
issue. Leave a note concerning problems with this function.
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ec808a44
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2021-02-07T13:57:49
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Speed up HTML fuzzer
htmlDocDumpMemory uses the "HTML" encoding if no other encoding was
specified in the source HTML. This encoding can be extremely slow
because of an inefficiency in htmlEntityValueLookup. Stop encoding
the output for now.
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e2b975c3
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2020-12-18T00:50:34
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Handle malloc failures in fuzzing code
Avoid misdiagnosis in OOM situations.
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9086988f
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2020-12-16T15:41:52
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Enforce maximum length of fuzz input
Remove the libfuzzer max_len option which doesn't apply to other
fuzzing engines. Enforce the maximum length directly in the fuzz
targets. For the xml target, lower the maximum when expanding entities
to avoid timeout and OOM errors.
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8a85263f
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2020-10-25T20:08:16
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Add fuzzing dictionaries to EXTRA_DIST
Also add static seed corpus for the URI fuzzer.
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6f1470a5
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2020-08-25T18:50:45
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Hardcode maximum XPath recursion depth
Always limit nested functions calls to 5000. This avoids call stack
overflows with deeply nested expressions.
The expression parser produces about 10 nested function calls when
parsing a subexpression in parentheses, so the effective nesting limit
is about 500 which should be more than enough.
Use a lower limit when fuzzing to account for increased memory usage
when using sanitizers.
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8c3ef083
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2020-08-24T23:17:34
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Pass URL of main entity in XML fuzzer
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0d5f3710
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2020-08-24T16:28:54
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Consolidate seed corpus generation
Implement file handling in C to speed up corpus generation.
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0d9da029
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2020-08-24T03:16:25
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Test fuzz targets with dummy driver
Run fuzz targets with files in seed corpus during test.
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804c5297
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2020-08-17T03:37:18
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Stop using maxParserDepth in xpath.c
Only use a single maxDepth value.
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0ff52748
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2020-08-17T02:54:28
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Fix autotools warnings
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10a07948
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2020-08-08T17:46:11
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Fix XPath fuzzer
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6c128fd5
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2020-06-05T13:43:45
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Fuzz XInclude engine
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ad26a60f
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2020-08-06T13:20:01
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Add XPath and XPointer fuzzer
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905820a4
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2020-07-12T22:59:39
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Update fuzzing code
- Shorten timeouts
- Align options from Makefile and options files
- Add section headers to Makefile
- Skip invalid UTF-8 in regexp fuzzer
- Update regexp.dict
- Generate HTML seed corpus in correct format
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93ce33c2
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2020-07-23T17:34:08
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Fix several quadratic runtime issues in HTML push parser
Fix a few remaining cases where the HTML push parser would scan more
content during lookahead than being parsed later.
Make sure that htmlParseDocTypeDecl consumes all content up to the
final '>' in case of errors. The old comment said "We shouldn't try to
resynchronize", but ignoring invalid content is also what the HTML5
spec mandates.
Likewise, make htmlParseEndTag skip to the final '>' in invalid end
tags even if not in recovery mode. This is probably the most visible
change in practice and leads to different output for some tests but is
also more in line with HTML5.
Make sure that htmlParsePI and htmlParseComment don't abort if invalid
characters are encountered but log an error and ignore the character.
Change some other end-of-buffer checks to test for a zero byte instead
of relying on IS_CHAR.
Fix usage of IS_CHAR macro in htmlParseScript.
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eac1c7e2
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2020-06-21T14:42:00
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Fuzz target for XML Schemas
This only tests the schema parser for now.
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ffd31dbe
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2020-06-21T12:14:19
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Move entity recorder to fuzz.c
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536f421d
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2020-06-15T12:20:54
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Fuzz target for HTML parser
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e98150d4
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2020-06-09T13:45:31
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Add options file for xml fuzzer
This will be picked up OSS-Fuzz, limiting the maximum input size to
80 KB and hopefully avoiding timeouts. Some of the timeouts seem to be
related to our suboptimal handling of excessive entity expansion.
The new fuzzers support external entities and make this problem even
more prominent.
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00ed736e
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2020-06-05T12:49:25
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Add a couple of libFuzzer targets
- XML fuzzer
Currently tests the pull parser, push parser and reader, as well as
serialization. Supports splitting fuzz data into multiple documents
for things like external DTDs or entities. The seed corpus is built
from parts of the test suite.
- Regexp fuzzer
Seed corpus was statically generated from test suite.
- URI fuzzer
Tests parsing and most other functions from uri.c.
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