Fuzz introspector: fuzz_decomp_corrupt_block
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
103 11 lz4_flex::frame::FrameDecoder::new call site: 00011 FrameDecoder::read_to_end
59 128 SliceSink::capacity call site: 00128 BlockInfo::read
12 115 SliceSink::extend_with_fill call site: 00115 FrameDecoder::read_block
10 0 EP call site: 00000
7 196 io::Result::extend_from_slice call site: 00196
4 189 SliceSink::extend_from_slice_wild call site: 00189 short_copy
1 206 lz4_flex::block::decompress_with_dict call site: 00206

Fuzzer calltree

0 fuzz_target [function] [call site] 00000
1 Result::is_empty [function] [call site] 00001
1 lz4_flex::block::decompress [function] [call site] 00002
2 lz4_flex::frame::FrameDecoder::new [function] [call site] 00003
3 CompressTable::default [function] [call site] 00004
4 CompressTable::Small [function] [call site] 00005
4 HashTable4KU16::new [function] [call site] 00006
5 into_boxed_slice [function] [call site] 00007
5 try_into [function] [call site] 00008
5 unwrap [function] [call site] 00009
3 CompressTable::default [function] [call site] 00010
3 XxHash32::with_seed [function] [call site] 00011
2 TrackWriteSize::new [function] [call site] 00012
2 FrameDecoder::read_to_end [function] [call site] 00013
3 FrameDecoder::fill_buf [function] [call site] 00014
4 FrameDecoder::read_more [function] [call site] 00015
5 is_none [function] [call site] 00016
5 FrameDecoder::read_frame_info [function] [call site] 00017
6 FrameInfo::read [function] [call site] 00018
7 read_exact [function] [call site] 00019
7 u32::from_le_bytes [function] [call site] 00020
7 Ok [function] [call site] 00021
7 CompressTable::default [function] [call site] 00022
8 CompressTable::Small [function] [call site] 00023
8 HashTable4KU16::new [function] [call site] 00024
7 contains [function] [call site] 00025
7 read_exact [function] [call site] 00026
7 u32::from_le_bytes [function] [call site] 00027
7 Err [function] [call site] 00028
7 Error::SkippableFrame [function] [call site] 00029
7 Err [function] [call site] 00030
7 read_exact [function] [call site] 00031
7 Err [function] [call site] 00032
7 Error::UnsupportedVersion [function] [call site] 00033
7 Err [function] [call site] 00034
7 Err [function] [call site] 00035
7 Error::UnsupportedBlocksize [function] [call site] 00036
7 read_exact [function] [call site] 00037
7 unwrap [function] [call site] 00038
7 Some [function] [call site] 00039
7 u64::from_le_bytes [function] [call site] 00040
7 read_exact [function] [call site] 00041
7 Some [function] [call site] 00042
7 u32::from_le_bytes [function] [call site] 00043
7 read_exact [function] [call site] 00044
7 XxHash32::with_seed [function] [call site] 00045
7 TrackWriteSize::write [function] [call site] 00046
8 TrackWriteSize::write [function] [call site] 00047
8 Ok [function] [call site] 00048
7 &[u8]::len [function] [call site] 00049
7 len [function] [call site] 00050
7 FrameEncoder::auto_finish [function] [call site] 00051
8 Some [function] [call site] 00052
7 Err [function] [call site] 00053
7 Ok [function] [call site] 00054
6 Ok [function] [call site] 00055
6 read_exact [function] [call site] 00056
6 u32::from_le_bytes [function] [call site] 00057
6 try_into [function] [call site] 00058
6 unwrap [function] [call site] 00059
6 FrameInfo::read [function] [call site] 00060
6 Ok [function] [call site] 00061
6 read_exact [function] [call site] 00062
6 FrameInfo::read_size [function] [call site] 00063
7 u32::from_le_bytes [function] [call site] 00064
7 try_into [function] [call site] 00065
7 unwrap [function] [call site] 00066
7 Ok [function] [call site] 00067
7 len [function] [call site] 00068
7 Ok [function] [call site] 00069
7 contains [function] [call site] 00070
7 Ok [function] [call site] 00071
7 Err [function] [call site] 00072
7 Ok [function] [call site] 00073
6 read_exact [function] [call site] 00074
6 FrameInfo::read [function] [call site] 00075
7 read_exact [function] [call site] 00076
7 u32::from_le_bytes [function] [call site] 00077
7 Ok [function] [call site] 00078
7 CompressTable::default [function] [call site] 00079
7 contains [function] [call site] 00080
7 read_exact [function] [call site] 00081
7 u32::from_le_bytes [function] [call site] 00082
7 Err [function] [call site] 00083
7 Error::SkippableFrame [function] [call site] 00084
7 Err [function] [call site] 00085
7 read_exact [function] [call site] 00086
7 Err [function] [call site] 00087
7 Error::UnsupportedVersion [function] [call site] 00088
7 Err [function] [call site] 00089
7 Err [function] [call site] 00090
7 Error::UnsupportedBlocksize [function] [call site] 00091
7 read_exact [function] [call site] 00092
7 unwrap [function] [call site] 00093
7 Some [function] [call site] 00094
7 u64::from_le_bytes [function] [call site] 00095
7 read_exact [function] [call site] 00096
7 Some [function] [call site] 00097
7 u32::from_le_bytes [function] [call site] 00098
7 read_exact [function] [call site] 00099
7 XxHash32::with_seed [function] [call site] 00100
7 TrackWriteSize::write [function] [call site] 00101
7 &[u8]::len [function] [call site] 00102
7 len [function] [call site] 00103
7 FrameEncoder::auto_finish [function] [call site] 00104
7 Err [function] [call site] 00105
7 Ok [function] [call site] 00106
6 is_some [function] [call site] 00107
6 Err [function] [call site] 00108
6 compress_into [function] [call site] 00109
7 compress_into_sink_with_dict::<false> [function] [call site] 00110
7 SliceSink::new [function] [call site] 00111
6 BlockSize::get_size [function] [call site] 00112
6 HashTable4KU16::clear [function] [call site] 00113
7 SliceSink::extend_with_fill [function] [call site] 00114
8 SliceSink::extend_with_fill [function] [call site] 00115
6 HashTable4KU16::clear [function] [call site] 00116
6 reserve_exact [function] [call site] 00117
6 reserve_exact [function] [call site] 00118
6 Some [function] [call site] 00119
6 XxHash32::with_seed [function] [call site] 00120
6 Ok [function] [call site] 00121
5 Ok [function] [call site] 00122
5 FrameDecoder::read_block [function] [call site] 00123
6 as_ref [function] [call site] 00124
6 unwrap [function] [call site] 00125
6 BlockSize::get_size [function] [call site] 00126
6 SliceSink::capacity [function] [call site] 00127
7 len [function] [call site] 00128
6 min [function] [call site] 00129
6 read_exact [function] [call site] 00130
6 kind [function] [call site] 00131
6 Ok [function] [call site] 00132
6 Err [function] [call site] 00133
6 BlockInfo::read [function] [call site] 00134
7 read_exact [function] [call site] 00135
7 u32::from_le_bytes [function] [call site] 00136
7 Ok [function] [call site] 00137
7 Ok [function] [call site] 00138
7 BlockInfo::Uncompressed [function] [call site] 00139
7 Ok [function] [call site] 00140
7 BlockInfo::Compressed [function] [call site] 00141
6 Err [function] [call site] 00142
6 compress_into [function] [call site] 00143
6 read_exact [function] [call site] 00144
6 vec_resize_and_get_mut [function] [call site] 00145
7 &mut [call site] 00146
7 &mut [call site] 00147
6 FrameDecoder::read_checksum [function] [call site] 00148
7 size_of::<u32> [function] [call site] 00149
7 Vec::read_exact [function] [call site] 00150
7 u32::from_le_bytes [function] [call site] 00151
7 Ok [function] [call site] 00152
6 FrameDecoder::check_block_checksum [function] [call site] 00153
7 XxHash32::with_seed [function] [call site] 00154
7 TrackWriteSize::write [function] [call site] 00155
7 FrameEncoder::auto_finish [function] [call site] 00156
7 Err [function] [call site] 00157
7 compress_into [function] [call site] 00158
7 Ok [function] [call site] 00159
6 Err [function] [call site] 00160
6 compress_into [function] [call site] 00161
6 read_exact [function] [call site] 00162
6 vec_resize_and_get_mut [function] [call site] 00163
6 FrameDecoder::read_checksum [function] [call site] 00164
6 FrameDecoder::check_block_checksum [function] [call site] 00165
6 split_at_mut [function] [call site] 00166
6 crate::block::decompress::decompress_internal::<true, [call site] 00167
6 SliceSink::new [function] [call site] 00168
6 crate::block::decompress::decompress_internal::<false, [call site] 00169
6 { [call site] 00170
0 block::WINDOW_SIZE, [call site] 00171
0 sink::vec_sink_for_decompression [function] [call site] 00172
7 impl [call site] 00173
7 SliceSink::new [function] [call site] 00174
6 map_err [function] [call site] 00175
6 Err [function] [call site] 00176
6 compress_into [function] [call site] 00177
6 FrameDecoder::read_checksum [function] [call site] 00178
6 FrameEncoder::auto_finish [function] [call site] 00179
6 Err [function] [call site] 00180
6 compress_into [function] [call site] 00181
6 Ok [function] [call site] 00182
6 TrackWriteSize::write [function] [call site] 00183
6 Ok [function] [call site] 00184
4 Ok [function] [call site] 00185
3 Ok [function] [call site] 00186
3 io::Result::extend_from_slice [function] [call site] 00187
4 SliceSink::extend_from_slice_wild [function] [call site] 00188
5 fastcpy::slice_copy [function] [call site] 00189
6 short_copy [function] [call site] 00190
7 double_copy_trick::<2> [function] [call site] 00191
6 double_copy_trick::<4> [function] [call site] 00192
6 double_copy_trick::<8> [function] [call site] 00193
6 wild_copy_from_src::<16> [function] [call site] 00194
5 &[u8]::len [function] [call site] 00195
4 &[u8]::len [function] [call site] 00196
3 len [function] [call site] 00197
3 FrameDecoder::consume [function] [call site] 00198
3 Result::kind [function] [call site] 00199
3 Err [function] [call site] 00200
2 Ok [function] [call site] 00201
1 lz4_flex::block::decompress_with_dict [function] [call site] 00202
2 decompress_internal::<true, [call site] 00203
2 SliceSink::new [function] [call site] 00204
2 truncate [function] [call site] 00205
2 Ok [function] [call site] 00206
1 std::hint::black_box [function] [call site] 00207