Fuzz introspector: fuzz_decomp_corrupt_frame
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
17 199 SliceSink::extend_from_slice call site: 00199 lz4_flex_frame_decompress
7 0 EP call site: 00000 FrameDecoder::read_to_end
6 160 FrameDecoder::read_block call site: 00160
5 192 FrameDecoder::read_to_end call site: 00192
4 181 SliceSink::extend_from_slice_wild call site: 00181 short_copy
2 38 FrameInfo::read call site: 00038 TrackWriteSize::write
2 101 FrameDecoder::read_frame_info call site: 00101
2 137 FrameDecoder::read_block call site: 00137
1 21 FrameInfo::read call site: 00021
1 43 FrameInfo::read call site: 00043
1 46 FrameInfo::read call site: 00046
1 60 FrameInfo::read_size call site: 00060

Fuzzer calltree

0 fuzz_target [function] [call site] 00000
1 lz4_flex_frame_decompress [function] [call site] 00001
2 lz4_flex::frame::FrameDecoder::new [function] [call site] 00002
3 Default::default [function] [call site] 00003
3 Default::default [function] [call site] 00004
3 XxHash32::with_seed [function] [call site] 00005
2 TrackWriteSize::new [function] [call site] 00006
2 FrameDecoder::read_to_end [function] [call site] 00007
3 FrameDecoder::fill_buf [function] [call site] 00008
4 FrameDecoder::read_more [function] [call site] 00009
5 FrameDecoder::read_frame_info [function] [call site] 00011
6 FrameInfo::read [function] [call site] 00012
7 &[u8]::read_exact [function] [call site] 00013
7 u32::from_le_bytes [function] [call site] 00014
7 FrameInfo::default [function] [call site] 00016
7 &[u8]::read_exact [function] [call site] 00018
7 u32::from_le_bytes [function] [call site] 00019
7 Error::SkippableFrame [function] [call site] 00021
7 &[u8]::read_exact [function] [call site] 00023
7 Error::UnsupportedVersion [function] [call site] 00025
7 Error::UnsupportedBlocksize [function] [call site] 00028
7 &[u8]::read_exact [function] [call site] 00029
7 u64::from_le_bytes [function] [call site] 00032
7 &[u8]::read_exact [function] [call site] 00033
7 u32::from_le_bytes [function] [call site] 00035
7 &[u8]::read_exact [function] [call site] 00036
7 XxHash32::with_seed [function] [call site] 00037
7 TrackWriteSize::write [function] [call site] 00038
8 TrackWriteSize::write [function] [call site] 00039
7 &[u8]::len [function] [call site] 00041
7 &[u8]::len [function] [call site] 00042
7 FrameEncoder::auto_finish [function] [call site] 00043
6 read_exact [function] [call site] 00048
6 u32::from_le_bytes [function] [call site] 00049
6 FrameInfo::read [function] [call site] 00052
6 read_exact [function] [call site] 00054
6 read_exact [function] [call site] 00066
6 FrameInfo::read [function] [call site] 00067
7 &[u8]::read_exact [function] [call site] 00068
7 u32::from_le_bytes [function] [call site] 00069
7 FrameInfo::default [function] [call site] 00071
7 &[u8]::read_exact [function] [call site] 00073
7 u32::from_le_bytes [function] [call site] 00074
7 Error::SkippableFrame [function] [call site] 00076
7 &[u8]::read_exact [function] [call site] 00078
7 Error::UnsupportedVersion [function] [call site] 00080
7 Error::UnsupportedBlocksize [function] [call site] 00083
7 &[u8]::read_exact [function] [call site] 00084
7 u64::from_le_bytes [function] [call site] 00087
7 &[u8]::read_exact [function] [call site] 00088
7 u32::from_le_bytes [function] [call site] 00090
7 &[u8]::read_exact [function] [call site] 00091
7 XxHash32::with_seed [function] [call site] 00092
7 TrackWriteSize::write [function] [call site] 00093
7 &[u8]::len [function] [call site] 00094
7 &[u8]::len [function] [call site] 00095
7 FrameEncoder::auto_finish [function] [call site] 00096
6 compress_into [function] [call site] 00101
7 compress_into_sink_with_dict::<false> [function] [call site] 00102
7 SliceSink::new [function] [call site] 00103
6 BlockSize::get_size [function] [call site] 00104
6 HashTable4KU16::clear [function] [call site] 00105
7 SliceSink::extend_with_fill [function] [call site] 00106
8 SliceSink::extend_with_fill [function] [call site] 00107
6 HashTable4KU16::clear [function] [call site] 00108
6 reserve_exact [function] [call site] 00109
6 reserve_exact [function] [call site] 00110
6 XxHash32::with_seed [function] [call site] 00112
5 FrameDecoder::read_block [function] [call site] 00115
6 BlockSize::get_size [function] [call site] 00118
6 SliceSink::capacity [function] [call site] 00119
6 read_exact [function] [call site] 00122
6 BlockInfo::read [function] [call site] 00126
7 &[u8]::read_exact [function] [call site] 00127
7 u32::from_le_bytes [function] [call site] 00128
7 BlockInfo::Uncompressed [function] [call site] 00131
7 BlockInfo::Compressed [function] [call site] 00133
6 compress_into [function] [call site] 00135
6 read_exact [function] [call site] 00136
6 vec_resize_and_get_mut [function] [call site] 00137
7 &mut [call site] 00138
7 &mut [call site] 00139
6 FrameDecoder::read_checksum [function] [call site] 00140
7 size_of::<u32> [function] [call site] 00141
7 Vec::read_exact [function] [call site] 00142
7 u32::from_le_bytes [function] [call site] 00143
6 FrameDecoder::check_block_checksum [function] [call site] 00145
7 XxHash32::with_seed [function] [call site] 00146
7 TrackWriteSize::write [function] [call site] 00147
7 FrameEncoder::auto_finish [function] [call site] 00148
7 compress_into [function] [call site] 00150
6 compress_into [function] [call site] 00153
6 read_exact [function] [call site] 00154
6 vec_resize_and_get_mut [function] [call site] 00155
6 FrameDecoder::read_checksum [function] [call site] 00156
6 FrameDecoder::check_block_checksum [function] [call site] 00157
6 split_at_mut [function] [call site] 00158
6 crate::block::decompress::decompress_internal::<true, [call site] 00159
6 SliceSink::new [function] [call site] 00160
6 crate::block::decompress::decompress_internal::<false, [call site] 00161
6 { [call site] 00162
0 block::WINDOW_SIZE, [call site] 00163
0 sink::vec_sink_for_decompression [function] [call site] 00164
7 impl [call site] 00165
7 SliceSink::new [function] [call site] 00166
6 compress_into [function] [call site] 00169
6 FrameDecoder::read_checksum [function] [call site] 00170
6 FrameEncoder::auto_finish [function] [call site] 00171
6 compress_into [function] [call site] 00173
6 TrackWriteSize::write [function] [call site] 00175
4 Ok [function] [call site] 00177
3 Ok [function] [call site] 00178
3 io::Result::extend_from_slice [function] [call site] 00179
4 SliceSink::extend_from_slice_wild [function] [call site] 00180
5 fastcpy::slice_copy [function] [call site] 00181
6 short_copy [function] [call site] 00182
7 double_copy_trick::<2> [function] [call site] 00183
6 double_copy_trick::<4> [function] [call site] 00184
6 double_copy_trick::<8> [function] [call site] 00185
6 wild_copy_from_src::<16> [function] [call site] 00186
5 &[u8]::len [function] [call site] 00187
4 &[u8]::len [function] [call site] 00188
3 len [function] [call site] 00189
3 FrameDecoder::consume [function] [call site] 00190
3 Result::kind [function] [call site] 00191
3 Err [function] [call site] 00192
2 Ok [function] [call site] 00193
1 Vec::with_capacity [function] [call site] 00194
1 len [function] [call site] 00195
1 HashTable4KU16::clear [function] [call site] 00196
1 SliceSink::extend_from_slice [function] [call site] 00197
2 SliceSink::extend_from_slice_wild [function] [call site] 00198
2 &[u8]::len [function] [call site] 00199
1 SliceSink::extend_from_slice [function] [call site] 00200
1 lz4_flex_frame_decompress [function] [call site] 00201
1 HashTable4KU16::clear [function] [call site] 00202
1 SliceSink::extend_from_slice [function] [call site] 00203
1 SliceSink::extend_from_slice [function] [call site] 00204
1 lz4_flex_frame_decompress [function] [call site] 00205
1 HashTable4KU16::clear [function] [call site] 00206
1 SliceSink::extend_from_slice [function] [call site] 00207
1 SliceSink::extend_from_slice [function] [call site] 00208
1 len [function] [call site] 00209
1 to_le_bytes [function] [call site] 00210
1 SliceSink::extend_from_slice [function] [call site] 00211
1 SliceSink::extend_from_slice [function] [call site] 00212
1 len [function] [call site] 00213
1 to_le_bytes [function] [call site] 00214
1 SliceSink::extend_from_slice [function] [call site] 00215
1 lz4_flex_frame_decompress [function] [call site] 00216