Fuzz introspector
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues
Project coverage
Per-fuzzer coverage

Table of contents

Project overview: libtiff
High level conclusions
Reachability and coverage overview
Fuzzers overview
Project functions overview
Fuzzer details
Fuzzer: tiff_read_rgba_fuzzer
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Analyses and suggestions
Optimal target analysis
Remaining optimal interesting functions
All functions overview
Fuzz engine guidance
/src/libtiff/contrib/oss-fuzz/tiff_read_rgba_fuzzer.cc
Dictionary
Fuzzer function priority
Runtime coverage analysis
Complex functions with low coverage
Files and Directories in report
Files in report
Directories in report
Metadata section
Report generation date: 2026-04-12

Project overview: libtiff

High level conclusions

Reachability and coverage overview

Functions statically reachable by fuzzers
24.0%
363 / 1536
Cyclomatic complexity statically reachable by fuzzers
22.0%
3163 / 14180
Runtime code coverage of functions
45.0%
696 / 1536

Warning: The number of runtime covered functions are larger than the number of reachable functions. This means that Fuzz Introspector found there are more functions covered at runtime than what is considered reachable based on the static analysis. This is a limitation in the analysis as anything covered at runtime is by definition reachable by the fuzzers.
This is likely due to a limitation in the static analysis. In this case, the count of functions covered at runtime is the true value, which means this is what should be considered "achieved" by the fuzzer.

Use the project functions table below to query all functions that were not covered at runtime.

Fuzzers overview

Fuzzer Fuzzer filename Functions Reached Functions unreached Fuzzer depth Files reached Basic blocks reached Cyclomatic complexity Details
tiff_read_rgba_fuzzer /src/libtiff/contrib/oss-fuzz/tiff_read_rgba_fuzzer.cc 397 1322 15 31 9272 3299 tiff_read_rgba_fuzzer.cc

Project functions overview

The following table shows data about each function in the project. The functions included in this table correspond to all functions that exist in the executables of the fuzzers. As such, there may be functions that are from third-party libraries.

For further technical details on the meaning of columns in the below table, please see the Glossary .

Func name Functions filename Args Function call depth Reached by Fuzzers Runtime reached by Fuzzers Combined reached by Fuzzers Fuzzers runtime hit Func lines hit % I Count BB Count Cyclomatic complexity Functions reached Reached by functions Accumulated cyclomatic complexity Undiscovered complexity

Fuzzer details

Fuzzer: tiff_read_rgba_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 1099 53.1%
gold [1:9] 75 3.62%
yellow [10:29] 79 3.81%
greenyellow [30:49] 39 1.88%
lawngreen 50+ 777 37.5%
All colors 2069 100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
327 1204 TIFFClientOpenExt call site: 01204 TIFFFlush
221 1532 TIFFGetField call site: 01532 TIFFRewriteDirectorySec
23 1114 TIFFGetStrileByteCountWithErr call site: 01114 _TIFFFillStriles
21 506 TIFFReadDirEntrySbyteArray call site: 00506 EvaluateIFDdatasizeReading
21 762 TIFFFetchNormalTag call site: 00762 TIFFReadDirEntryLong8Array
19 147 TIFFFetchDirectory call site: 00147 _TIFFCheckMalloc
19 300 TIFFFetchNormalTag call site: 00300 TIFFReadDirEntrySbyte
19 2014 TIFFFillStrip call site: 02014 TIFFFillStripPartial
18 594 TIFFReadDirEntrySlongArray call site: 00594 TIFFReadDirEntryLong8Array
17 337 TIFFFetchNormalTag call site: 00337 TIFFReadDirEntrySshort
16 544 TIFFReadDirEntrySshortArray call site: 00544 EvaluateIFDdatasizeReading
15 371 TIFFFetchNormalTag call site: 00371 TIFFReadDirEntrySlong

Runtime coverage analysis

Covered functions
699
Functions that are reachable but not covered
159
Reachable functions
397
Percentage of reachable functions covered
59.95%
NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.
Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.
Function name source code lines source lines hit percentage hit

Files reached

filename functions hit
/src/libtiff/contrib/oss-fuzz/tiff_read_rgba_fuzzer.cc 2
/src/libtiff/libtiff/tif_error.c 4
/src/libtiff/libtiff/tif_warning.c 2
/src/libtiff/libtiff/tif_stream.cxx 16
/src/libtiff/libtiff/tif_open.c 11
/src/libtiff/libtiff/tif_unix.c 7
/src/libtiff/libtiff/tif_dir.c 13
/src/libtiff/libtiff/tif_compress.c 3
/src/libtiff/libtiff/tif_swab.c 9
/src/libtiff/libtiff/tif_dirinfo.c 12
/src/libtiff/libtiff/tif_aux.c 12
/src/libtiff/libtiff/tif_dirread.c 114
/src/libtiff/libtiff/tif_hash_set.c 13
/src/libtiff/libtiff/tif_codec.c 1
/src/libtiff/libtiff/tif_strip.c 7
/src/libtiff/libtiff/tif_tile.c 5
/src/libtiff/libtiff/tif_write.c 3
/src/libtiff/libtiff/tif_close.c 3
/src/libtiff/libtiff/tif_flush.c 3
/src/libtiff/libtiff/tif_dirwrite.c 69
/src/libtiff/libtiff/tif_getimage.c 20
/src/libtiff/libtiff/tif_color.c 3
/src/libtiff/libtiff/tif_read.c 11
/src/libtiff/libtiff/tif_jpeg.c 6
/src/libjpeg-turbo/src/jerror.c 1
/src/libjpeg-turbo/src/jdapimin.c 5
/src/libjpeg-turbo/src/jmemmgr.c 1
/src/libjpeg-turbo/src/jmemnobs.c 3
/src/libjpeg-turbo/src/jdmarker.c 2
/src/libjpeg-turbo/src/jdinput.c 1
/src/libjpeg-turbo/src/jcomapi.c 2

Analyses and suggestions

Optimal target analysis

Remaining optimal interesting functions

The following table shows a list of functions that are optimal targets. Optimal targets are identified by finding the functions that in combination, yield a high code coverage.

Func name Functions filename Arg count Args Function depth hitcount instr count bb count cyclomatic complexity Reachable functions Incoming references total cyclomatic complexity Unreached complexity
OJPEGPreDecode /src/libtiff/libtiff/tif_ojpeg.c 2 ['N/A', 'short'] 16 0 371 52 20 164 0 1449 1047
JPEGPreEncode /src/libtiff/libtiff/tif_jpeg.c 2 ['N/A', 'short'] 8 0 631 87 31 95 0 856 669
encode_mcu_huff /src/libjpeg-turbo/src/jchuff.c 2 ['N/A', 'N/A'] 3 0 228 33 14 5 0 592 592
PixarLogEncode /src/libtiff/libtiff/tif_pixarlog.c 4 ['N/A', 'N/A', 'size_t', 'short'] 6 0 337 41 8 51 0 569 492
PixarLogDecode /src/libtiff/libtiff/tif_pixarlog.c 4 ['N/A', 'N/A', 'size_t', 'short'] 4 0 519 58 12 23 0 421 365
read_markers /src/libjpeg-turbo/src/jdmarker.c 1 ['N/A'] 2 0 830 187 34 12 0 245 241
Fax3Decode2D /src/libtiff/libtiff/tif_fax3.c 4 ['N/A', 'N/A', 'size_t', 'short'] 2 0 5618 860 211 8 0 247 231
_TIFFVSetField /src/libtiff/libtiff/tif_dir.c 3 ['N/A', 'int', 'N/A'] 6 0 4228 586 173 38 0 394 209
decode_mcu /src/libjpeg-turbo/src/jdhuff.c 2 ['N/A', 'N/A'] 3 0 135 30 13 5 0 183 183
gtTileSeparate /src/libtiff/libtiff/tif_getimage.c 4 ['N/A', 'N/A', 'int', 'int'] 16 0 864 120 41 84 0 693 176

Implementing fuzzers that target the above functions will improve reachability such that it becomes:

Functions statically reachable by fuzzers
41.0%
623 / 1536
Cyclomatic complexity statically reachable by fuzzers
52.0%
7362 / 14180

All functions overview

If you implement fuzzers for these functions, the status of all functions in the project will be:

Func name Functions filename Args Function call depth Reached by Fuzzers Runtime reached by Fuzzers Combined reached by Fuzzers Fuzzers runtime hit Func lines hit % I Count BB Count Cyclomatic complexity Functions reached Reached by functions Accumulated cyclomatic complexity Undiscovered complexity

Fuzz engine guidance

This sections provides heuristics that can be used as input to a fuzz engine when running a given fuzz target. The current focus is on providing input that is usable by libFuzzer.

/src/libtiff/contrib/oss-fuzz/tiff_read_rgba_fuzzer.cc

Dictionary

Use this with the libFuzzer -dict=DICT.file flag


Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name 

-focus_function=['TIFFClientOpenExt', 'TIFFGetField', 'TIFFGetStrileByteCountWithErr', 'TIFFReadDirEntrySbyteArray', 'TIFFFetchNormalTag', 'TIFFFetchDirectory', 'TIFFFillStrip', 'TIFFReadDirEntrySlongArray']

Runtime coverage analysis

This section shows analysis of runtime coverage data.

For futher technical details on how this section is generated, please see the Glossary .

Complex functions with low coverage

Func name Function total lines Lines covered at runtime percentage covered Reached by fuzzers
output_pass_setup 45 10 22.22% ['tiff_read_rgba_fuzzer']
start_pass 173 38 21.96% ['tiff_read_rgba_fuzzer']
jinit_color_deconverter 236 69 29.23% ['tiff_read_rgba_fuzzer']
null_convert 49 23 46.93% ['tiff_read_rgba_fuzzer']
j12init_color_deconverter 227 34 14.97% ['tiff_read_rgba_fuzzer']
jpeg_core_output_dimensions 130 32 24.61% ['tiff_read_rgba_fuzzer']
use_merged_upsample 38 6 15.78% ['tiff_read_rgba_fuzzer']
jinit_d_post_controller 39 20 51.28% ['tiff_read_rgba_fuzzer']
start_pass_dpost 36 14 38.88% ['tiff_read_rgba_fuzzer']
j12init_d_post_controller 40 20 50.0% ['tiff_read_rgba_fuzzer']
j12init_upsampler 81 44 54.32% ['tiff_read_rgba_fuzzer']
access_virt_sarray 59 30 50.84% ['tiff_read_rgba_fuzzer']
TIFFVGetFieldDefaulted 150 44 29.33% ['tiff_read_rgba_fuzzer']
_TIFFVGetField 331 102 30.81% ['tiff_read_rgba_fuzzer']
_TIFFCheckDirNumberAndOffset 126 34 26.98% ['tiff_read_rgba_fuzzer']
CalcFinalIFDdatasizeReading 51 3 5.882% ['tiff_read_rgba_fuzzer']
TIFFFetchDirectory 268 105 39.17% ['tiff_read_rgba_fuzzer']
TIFFReadDirEntryDouble 86 14 16.27% ['tiff_read_rgba_fuzzer']
TIFFReadDirEntrySbyteArray 181 28 15.46% ['tiff_read_rgba_fuzzer']
TIFFReadDirEntrySshortArray 169 28 16.56% ['tiff_read_rgba_fuzzer']
TIFFReadDirEntrySlongArray 163 26 15.95% ['tiff_read_rgba_fuzzer']
TIFFReadDirEntrySlong8Array 152 24 15.78% ['tiff_read_rgba_fuzzer']
_TIFFGetStrileOffsetOrByteCountValue 41 20 48.78% ['tiff_read_rgba_fuzzer']
_TIFFFillStrilesInternal 35 5 14.28% ['tiff_read_rgba_fuzzer']
TIFFRGBAImageGet 33 10 30.30% ['tiff_read_rgba_fuzzer']
TIFFHashSetInsert 37 15 40.54% ['tiff_read_rgba_fuzzer']
JBIGDecode 51 23 45.09% ['tiff_read_rgba_fuzzer']
TIFFInitJPEG 44 18 40.90% ['tiff_read_rgba_fuzzer']
JPEGInitializeLibJPEG 38 10 26.31% ['tiff_read_rgba_fuzzer']
LogLuvVSetField 55 25 45.45% ['tiff_read_rgba_fuzzer']
LZMAStrerror 31 9 29.03% ['tiff_read_rgba_fuzzer']
OJPEGVGetField 40 15 37.5% ['tiff_read_rgba_fuzzer']
_TIFFcallocExt 31 6 19.35% ['tiff_read_rgba_fuzzer']
_TIFFreallocExt 37 5 13.51% ['tiff_read_rgba_fuzzer']
TIFFClientOpenExt 337 155 45.99% ['tiff_read_rgba_fuzzer']
horizontalAccumulate12 71 19 26.76% ['tiff_read_rgba_fuzzer']
horizontalAccumulate11 59 15 25.42% ['tiff_read_rgba_fuzzer']
PixarLogVSetField 58 11 18.96% ['tiff_read_rgba_fuzzer']
TIFFFillStrip 119 58 48.73% ['tiff_read_rgba_fuzzer']
TIFFReadEncodedTile 44 24 54.54% ['tiff_read_rgba_fuzzer']
TIFFFillTile 111 58 52.25% ['tiff_read_rgba_fuzzer']
TIFFReadRawStrip1 57 25 43.85% ['tiff_read_rgba_fuzzer']
_tiffisSeekProc(void*,unsignedlong,int) 33 16 48.48% ['tiff_read_rgba_fuzzer']
TIFFCheckTile 31 15 48.38% ['tiff_read_rgba_fuzzer']
ZIPVSetField 51 9 17.64% ['tiff_read_rgba_fuzzer']

Files and Directories in report

This section shows which files and directories are considered in this report. The main reason for showing this is fuzz introspector may include more code in the reasoning than is desired. This section helps identify if too many files/directories are included, e.g. third party code, which may be irrelevant for the threat model. In the event too much is included, fuzz introspector supports a configuration file that can exclude data from the report. See the following link for more information on how to create a config file: link

Files in report

Source file Reached by Covered by
[] []
/src/zlib/adler32.c [] []
/src/libtiff/libtiff/tif_dumpmode.c [] []
/src/libjpeg-turbo/src/jdinput.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/wrapper/../jidctint.c [] []
/src/libtiff/libtiff/tif_error.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/wrapper/../jcsample.c [] []
/src/libjpeg-turbo/src/wrapper/../jquant2.c [] []
/src/libjpeg-turbo/src/wrapper/../jdmerge.c [] []
/src/libjpeg-turbo/src/jcomapi.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/jclhuff.c [] []
/src/libtiff/libtiff/tif_lzma.c [] []
/src/libtiff/libtiff/tif_jbig.c [] []
/src/libjpeg-turbo/src/jfdctflt.c [] []
/src/libjpeg-turbo/src/wrapper/../jcmainct.c [] []
/src/libjpeg-turbo/src/wrapper/../jidctflt.c [] []
/src/libtiff/libtiff/tif_ojpeg.c [] []
/src/libtiff/libtiff/tif_close.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libtiff/libtiff/tif_tile.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/wrapper/../jdcolor.c [] []
/src/libjpeg-turbo/src/jmemnobs.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/jdmarker.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/jerror.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/wrapper/../jddctmgr.c [] []
/src/libtiff/libtiff/tif_luv.c [] []
/src/libjpeg-turbo/src/wrapper/../jquant1.c [] []
/src/libjpeg-turbo/src/jcapimin.c [] []
/src/libtiff/libtiff/tif_dirwrite.c ['tiff_read_rgba_fuzzer'] []
/src/libjpeg-turbo/src/wrapper/../jddiffct.c [] []
/src/libjpeg-turbo/src/jdapimin.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/wrapper/../jdcolext.c [] []
/src/libtiff/libtiff/tif_unix.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/jcinit.c [] []
/src/libjpeg-turbo/src/wrapper/../jdmainct.h [] []
/src/libtiff/libtiff/tif_packbits.c [] []
/src/libtiff/libtiff/tif_getimage.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/zlib/zutil.c [] []
/src/libjpeg-turbo/src/jdhuff.c [] []
/src/libtiff/libtiff/tif_thunder.c [] []
/src/libtiff/libtiff/tif_hash_set.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/wrapper/../jidctred.c [] []
/src/libtiff/libtiff/tif_next.c [] []
/src/libjpeg-turbo/src/wrapper/../jclossls.c [] []
/src/libtiff/libtiff/tif_stream.cxx ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libtiff/libtiff/tif_fax3.c [] []
/src/libjpeg-turbo/src/wrapper/../jutils.c [] []
/src/libjpeg-turbo/src/wrapper/../jcdctmgr.c [] []
/src/libjpeg-turbo/src/jcparam.c [] []
/src/libtiff/libtiff/tif_swab.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libtiff/libtiff/tif_color.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libtiff/libtiff/tif_lzw.c [] []
/src/zlib/inffast.c [] []
/src/libjpeg-turbo/src/jcarith.c [] []
/src/libjpeg-turbo/src/jchuff.c [] []
/src/libjpeg-turbo/src/wrapper/../jfdctfst.c [] []
/src/libtiff/libtiff/tif_open.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/wrapper/../jcdiffct.c [] []
/src/libtiff/libtiff/tif_write.c ['tiff_read_rgba_fuzzer'] []
/src/libtiff/libtiff/tif_pixarlog.c [] []
/src/libtiff/libtiff/tif_codec.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libtiff/libtiff/tif_dirread.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/wrapper/../jccolor.c [] []
/src/libjpeg-turbo/src/wrapper/../jdsample.c [] []
/src/zlib/crc32.c [] []
/src/zlib/inflate.c [] []
/src/libjpeg-turbo/src/wrapper/../jidctfst.c [] []
/src/libtiff/libtiff/tif_compress.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/jdmaster.c [] []
/src/libtiff/libtiff/tif_strip.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libtiff/libtiff/tif_dirinfo.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/jstdhuff.c [] []
/usr/local/bin/../include/c++/v1/stdexcept [] []
/src/libtiff/contrib/oss-fuzz/tiff_read_rgba_fuzzer.cc ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libtiff/libtiff/tif_flush.c ['tiff_read_rgba_fuzzer'] []
/src/libjpeg-turbo/src/wrapper/../jccolext.c [] []
/src/libtiff/libtiff/tif_jpeg.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/wrapper/../jcapistd.c [] []
/src/zlib/deflate.c [] []
/src/libjpeg-turbo/src/jmemmgr.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libtiff/libtiff/tif_read.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/wrapper/../jdmrgext.c [] []
/src/zlib/trees.c [] []
/src/libjpeg-turbo/src/jcphuff.c [] []
/src/libjpeg-turbo/src/wrapper/../jdapistd.c [] []
/src/libjpeg-turbo/src/jcmarker.c [] []
/src/libjpeg-turbo/src/jdarith.c [] []
/src/libtiff/libtiff/tif_dir.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/wrapper/../jfdctint.c [] []
/src/zlib/inftrees.c [] []
/src/libjpeg-turbo/simd/jsimd.c [] []
/src/libjpeg-turbo/src/jdlhuff.c [] []
/src/libjpeg-turbo/src/wrapper/../jdmainct.c [] []
/src/libjpeg-turbo/src/wrapper/../jcprepct.c [] []
/src/libjpeg-turbo/src/jcmaster.c [] []
/src/libtiff/libtiff/tif_warning.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libtiff/libtiff/tif_aux.c ['tiff_read_rgba_fuzzer'] ['tiff_read_rgba_fuzzer']
/src/libjpeg-turbo/src/wrapper/../jdlossls.c [] []
/src/libjpeg-turbo/src/wrapper/../jdpostct.c [] []
/src/libjpeg-turbo/src/wrapper/../jccoefct.c [] []
/src/libtiff/libtiff/tif_predict.c [] []
/src/libtiff/libtiff/tif_zip.c [] []
/src/libjpeg-turbo/src/jdphuff.c [] []
/src/libjpeg-turbo/src/wrapper/../jdcoefct.c [] []

Directories in report

Directory
/src/libtiff/libtiff/
/src/libjpeg-turbo/simd/
/src/libjpeg-turbo/src/wrapper/../
/src/libtiff/contrib/oss-fuzz/
/src/libjpeg-turbo/src/
/src/zlib/
/usr/local/bin/../include/c++/v1/

Metadata section

This sections shows the raw data that is used to produce this report. This is mainly used for further processing and developer debugging.

Fuzzer Calltree file Program data file Coverage file
tiff_read_rgba_fuzzer fuzzerLogFile-0-mX9rJLKxn0.data fuzzerLogFile-0-mX9rJLKxn0.data.yaml tiff_read_rgba_fuzzer.covreport