Fuzz introspector: ext2fs_check_directory_fuzzer
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues

Fuzz blockers

The followings are the branches where fuzzer fails to bypass.

Unique non-covered Complexity Unique Reachable Complexities Unique Reachable Functions All non-covered Complexity All Reachable Complexity Function Name Function Callsite Blocked Branch
133 133 1 :

['ext2fs_flush2']

133 358 ext2fs_close2 call site: 00216 /src/e2fsprogs/lib/ext2fs/closefs.c:508
74 74 1 :

['raw_write_blk']

74 74 reuse_cache call site: 00000 /src/e2fsprogs/lib/ext2fs/unix_io.c:557
46 46 1 :

['ext2fs_free_block_bitmap']

114 158 ext2fs_free call site: 00156 /src/e2fsprogs/lib/ext2fs/freefs.c:41
46 46 1 :

['ext2fs_free_inode_bitmap']

68 112 ext2fs_free call site: 00157 /src/e2fsprogs/lib/ext2fs/freefs.c:43
16 16 3 :

['ext2fs_has_feature_sparse_super', 'test_root', 'ext2fs_has_feature_sparse_super2']

16 16 ext2fs_bg_has_super call site: 00060 /src/e2fsprogs/lib/ext2fs/closefs.c:38
14 27 5 :

['free_cache', 'pthread_mutex_destroy', 'pthread_mutex_init', 'close', 'ext2fs_free_mem']

14 27 unix_open_channel call site: 00000 /src/e2fsprogs/lib/ext2fs/unix_io.c:844
9 9 1 :

['ext2fs_get_dio_alignment']

35 85 unix_open_channel call site: 00000 /src/e2fsprogs/lib/ext2fs/unix_io.c:745
9 9 1 :

['ext2fs_free_dblist']

14 56 ext2fs_free call site: 00173 /src/e2fsprogs/lib/ext2fs/freefs.c:52
8 8 1 :

['ext2fs_badblocks_list_free']

22 64 ext2fs_free call site: 00172 /src/e2fsprogs/lib/ext2fs/freefs.c:48
7 127 3 :

['ext2fs_hashmap_create', 'ext2fs_set_feature_shared_blocks', 'ext2fs_free']

7 131 ext2fs_open2 call site: 00140 /src/e2fsprogs/lib/ext2fs/openfs.c:527
6 6 2 :

['setrlimit', 'getrlimit']

20 33 unix_open_channel call site: 00000 /src/e2fsprogs/lib/ext2fs/unix_io.c:823
6 6 1 :

['pthread_mutex_destroy']

6 12 unix_close call site: 00000 /src/e2fsprogs/lib/ext2fs/unix_io.c:955

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 open [call site] 00001
1 write [call site] 00002
1 close [call site] 00003
1 ext2fs_open [function] [call site] 00004
2 ext2fs_open2 [function] [call site] 00005
3 ext2fs_get_mem [function] [call site] 00006
3 ext2fs_safe_getenv [function] [call site] 00007
4 getuid [call site] 00008
4 prctl [call site] 00009
4 secure_getenv [call site] 00010
3 strtoul [call site] 00011
3 ext2fs_safe_getenv [function] [call site] 00012
3 strtoul [call site] 00013
3 strlen [call site] 00014
3 ext2fs_get_mem [function] [call site] 00015
3 strcpy [call site] 00016
3 strchr [call site] 00017
3 io_channel_set_options [function] [call site] 00018
4 strlen [call site] 00019
4 strcpy [call site] 00020
4 strchr [call site] 00021
4 strchr [call site] 00022
3 io_channel_alloc_buf [function] [call site] 00023
4 ext2fs_get_memalign [function] [call site] 00024
5 posix_memalign [call site] 00025
4 ext2fs_get_mem [function] [call site] 00026
3 ext2fs_get_mem [function] [call site] 00027
3 ext2fs_get_mem [function] [call site] 00028
3 ext2fs_verify_csum_type [function] [call site] 00029
4 ext2fs_has_feature_metadata_csum [function] [call site] 00030
3 ext2fs_superblock_csum_verify [function] [call site] 00031
4 ext2fs_superblock_csum [function] [call site] 00032
5 ext2fs_crc32c_le [function] [call site] 00033
6 crc32_le_generic [function] [call site] 00034
7 crc32_body [function] [call site] 00035
3 ext2fs_has_feature_journal_dev [function] [call site] 00036
3 ext2fs_has_feature_bigalloc [function] [call site] 00037
3 ext2fs_has_feature_bigalloc [function] [call site] 00038
3 ext2fs_has_feature_64bit [function] [call site] 00039
3 ext2fs_has_feature_journal_dev [function] [call site] 00040
3 ext2fs_init_csum_seed [function] [call site] 00041
4 ext2fs_has_feature_csum_seed [function] [call site] 00042
4 ext2fs_has_feature_metadata_csum [function] [call site] 00043
4 ext2fs_has_feature_ea_inode [function] [call site] 00044
4 ext2fs_crc32c_le [function] [call site] 00045
3 ext2fs_has_feature_64bit [function] [call site] 00046
3 ext2fs_blocks_count [function] [call site] 00047
4 ext2fs_has_feature_64bit [function] [call site] 00048
3 ext2fs_blocks_count [function] [call site] 00049
3 ext2fs_div64_ceil [function] [call site] 00050
3 ext2fs_has_feature_64bit [function] [call site] 00051
3 ext2fs_div_ceil [function] [call site] 00052
3 ext2fs_has_feature_meta_bg [function] [call site] 00053
3 ext2fs_get_array [function] [call site] 00054
4 ext2fs_get_mem [function] [call site] 00055
3 ext2fs_has_feature_meta_bg [function] [call site] 00056
3 ext2fs_descriptor_block_loc2 [function] [call site] 00057
4 ext2fs_has_feature_meta_bg [function] [call site] 00058
4 ext2fs_has_feature_64bit [function] [call site] 00059
4 ext2fs_bg_has_super [function] [call site] 00060
5 ext2fs_has_feature_sparse_super2 [function] [call site] 00061
5 ext2fs_has_feature_sparse_super [function] [call site] 00062
5 test_root [function] [call site] 00063
5 test_root [function] [call site] 00064
4 ext2fs_group_first_block2 [function] [call site] 00065
4 ext2fs_blocks_count [function] [call site] 00066
4 ext2fs_bg_has_super [function] [call site] 00067
3 io_channel_cache_readahead [function] [call site] 00068
3 ext2fs_descriptor_block_loc2 [function] [call site] 00069
3 io_channel_read_blk64 [function] [call site] 00070
3 ext2fs_has_group_desc_csum [function] [call site] 00071
4 ext2fs_has_feature_metadata_csum [function] [call site] 00072
4 ext2fs_has_feature_gdt_csum [function] [call site] 00073
3 ext2fs_bg_flags_clear [function] [call site] 00074
4 ext4fs_group_desc [function] [call site] 00075
5 ext2fs_group_desc [function] [call site] 00076
6 ext2fs_has_feature_64bit [function] [call site] 00077
6 ext2fs_has_feature_64bit [function] [call site] 00078
6 ext2fs_free_mem [function] [call site] 00079
6 ext2fs_get_mem [function] [call site] 00080
6 ext2fs_descriptor_block_loc2 [function] [call site] 00081
3 ext2fs_bg_flags_clear [function] [call site] 00082
3 ext2fs_bg_itable_unused_set [function] [call site] 00083
4 ext4fs_group_desc [function] [call site] 00084
4 ext2fs_has_feature_64bit [function] [call site] 00085
3 ext2fs_group_desc_csum_set [function] [call site] 00086
4 ext2fs_has_group_desc_csum [function] [call site] 00087
4 ext2fs_group_desc_csum [function] [call site] 00088
5 ext2fs_group_desc [function] [call site] 00089
5 ext2fs_has_feature_64bit [function] [call site] 00090
5 ext2fs_has_feature_metadata_csum [function] [call site] 00091
5 ext2fs_crc32c_le [function] [call site] 00092
5 ext2fs_crc32c_le [function] [call site] 00093
5 ext2fs_crc16 [function] [call site] 00094
5 ext2fs_crc16 [function] [call site] 00095
5 ext2fs_crc16 [function] [call site] 00096
5 ext2fs_crc16 [function] [call site] 00097
4 ext2fs_bg_checksum_set [function] [call site] 00098
5 ext4fs_group_desc [function] [call site] 00099
3 ext2fs_mark_super_dirty [function] [call site] 00100
3 ext2fs_has_feature_mmp [function] [call site] 00101
3 ext2fs_mmp_start [function] [call site] 00102
4 ext2fs_get_mem [function] [call site] 00103
4 ext2fs_mmp_read [function] [call site] 00104
5 ext2fs_blocks_count [function] [call site] 00105
5 stat [call site] 00106
5 open [call site] 00107
5 ext2fs_get_dio_alignment [function] [call site] 00108
6 ioctl [call site] 00109
6 sysconf [call site] 00110
5 ext2fs_get_memalign [function] [call site] 00111
5 ext2fs_llseek [function] [call site] 00112
6 my_llseek [function] [call site] 00113
6 __errno_location [call site] 00114
6 lseek [call site] 00115
6 __errno_location [call site] 00116
5 read [call site] 00117
4 sleep [call site] 00118
4 ext2fs_mmp_read [function] [call site] 00119
4 ext2fs_mmp_new_seq [function] [call site] 00120
5 getpid [call site] 00121
5 gettimeofday [call site] 00122
5 getuid [call site] 00123
5 gettimeofday [call site] 00124
5 random [call site] 00125
5 random [call site] 00126
4 gethostname [call site] 00127
4 strncpy [call site] 00128
4 ext2fs_mmp_write [function] [call site] 00129
5 gettimeofday [call site] 00130
5 ext2fs_blocks_count [function] [call site] 00131
5 ext2fs_mmp_csum_set [function] [call site] 00132
6 ext2fs_has_feature_metadata_csum [function] [call site] 00133
6 ext2fs_mmp_csum [function] [call site] 00134
7 ext2fs_crc32c_le [function] [call site] 00135
5 io_channel_write_blk64 [function] [call site] 00136
4 sleep [call site] 00137
4 ext2fs_mmp_read [function] [call site] 00138
4 ext2fs_mmp_write [function] [call site] 00139
3 ext2fs_mmp_stop [function] [call site] 00140
4 ext2fs_has_feature_mmp [function] [call site] 00141
4 ext2fs_mmp_read [function] [call site] 00142
4 memcmp [call site] 00143
4 ext2fs_mmp_write [function] [call site] 00144
4 close [call site] 00145
3 ext2fs_hashmap_create [function] [call site] 00146
4 calloc [call site] 00147
3 block_sha_map_free_entry [function] [call site] 00148
3 ext2fs_set_feature_shared_blocks [function] [call site] 00149
3 ext2fs_has_feature_casefold [function] [call site] 00150
3 ext2fs_load_nls_table [function] [call site] 00151
3 ext2fs_free [function] [call site] 00152
4 ext2fs_free_mem [function] [call site] 00153
4 ext2fs_free_mem [function] [call site] 00154
4 ext2fs_free_mem [function] [call site] 00155
4 ext2fs_free_mem [function] [call site] 00156
4 ext2fs_free_block_bitmap [function] [call site] 00157
5 ext2fs_free_generic_bmap [function] [call site] 00158
6 ext2fs_free_generic_bitmap [function] [call site] 00159
7 check_magic [function] [call site] 00160
7 ext2fs_free_mem [function] [call site] 00161
7 ext2fs_free_mem [function] [call site] 00162
7 ext2fs_free_mem [function] [call site] 00163
6 ext2fs_safe_getenv [function] [call site] 00164
6 ext2fs_print_bmap_statistics [function] [call site] 00165
7 fprintf [call site] 00166
7 fprintf [call site] 00167
6 ext2fs_free_mem [function] [call site] 00168
6 ext2fs_free_mem [function] [call site] 00169
4 ext2fs_free_inode_bitmap [function] [call site] 00170
5 ext2fs_free_generic_bmap [function] [call site] 00171
4 ext2fs_free_mem [function] [call site] 00172
4 ext2fs_badblocks_list_free [function] [call site] 00173
5 ext2fs_u32_list_free [function] [call site] 00174
6 ext2fs_free_mem [function] [call site] 00175
6 ext2fs_free_mem [function] [call site] 00176
4 ext2fs_free_dblist [function] [call site] 00177
5 ext2fs_free_mem [function] [call site] 00178
5 ext2fs_free_mem [function] [call site] 00179
4 ext2fs_free_inode_cache [function] [call site] 00180
5 ext2fs_free_mem [function] [call site] 00181
5 ext2fs_free_mem [function] [call site] 00182
5 ext2fs_free_mem [function] [call site] 00183
5 ext2fs_free_mem [function] [call site] 00184
4 ext2fs_free_mem [function] [call site] 00185
4 ext2fs_free_mem [function] [call site] 00186
4 ext2fs_hashmap_free [function] [call site] 00187
4 ext2fs_zero_blocks2 [function] [call site] 00188
5 io_channel_zeroout [function] [call site] 00189
5 realloc [call site] 00190
5 io_channel_write_blk64 [function] [call site] 00191
4 ext2fs_free_mem [function] [call site] 00192
1 ext2fs_check_directory [function] [call site] 00193
2 ext2fs_read_inode [function] [call site] 00194
3 ext2fs_read_inode2 [function] [call site] 00195
4 ext2fs_has_feature_journal_dev [function] [call site] 00196
4 ext2fs_create_inode_cache [function] [call site] 00197
5 ext2fs_get_mem [function] [call site] 00198
5 ext2fs_get_mem [function] [call site] 00199
5 ext2fs_get_array [function] [call site] 00200
5 ext2fs_get_mem [function] [call site] 00201
5 ext2fs_flush_icache [function] [call site] 00202
5 ext2fs_free_inode_cache [function] [call site] 00203
4 ext2fs_inode_table_loc [function] [call site] 00204
5 ext4fs_group_desc [function] [call site] 00205
5 ext2fs_has_feature_64bit [function] [call site] 00206
4 ext2fs_blocks_count [function] [call site] 00207
4 io_channel_read_blk64 [function] [call site] 00208
4 ext2fs_inode_csum_verify [function] [call site] 00209
5 ext2fs_has_feature_metadata_csum [function] [call site] 00210
5 ext2fs_inode_csum [function] [call site] 00211
6 ext2fs_crc32c_le [function] [call site] 00212
6 ext2fs_crc32c_le [function] [call site] 00213
6 ext2fs_crc32c_le [function] [call site] 00214
1 ext2fs_close [function] [call site] 00215
2 ext2fs_close2 [function] [call site] 00216
3 ext2fs_flush2 [function] [call site] 00217
4 ext2fs_has_feature_journal_dev [function] [call site] 00218
4 ext2fsP_get_time [function] [call site] 00219
5 time [call site] 00220
4 __sb_set_tstamp [function] [call site] 00221
4 ext2fs_clear_feature_journal_needs_recovery [function] [call site] 00222
4 ext2fs_has_feature_journal_dev [function] [call site] 00223
4 ext2fs_has_feature_meta_bg [function] [call site] 00224
4 ext2fs_super_and_bgd_loc2 [function] [call site] 00225
5 ext2fs_group_first_block2 [function] [call site] 00226
5 ext2fs_has_feature_meta_bg [function] [call site] 00227
5 ext2fs_bg_has_super [function] [call site] 00228
5 ext2fs_has_feature_64bit [function] [call site] 00229
5 ext2fs_has_feature_meta_bg [function] [call site] 00230
4 write_backup_super [function] [call site] 00231
5 ext2fs_superblock_csum_set [function] [call site] 00232
6 ext2fs_superblock_csum [function] [call site] 00233
5 io_channel_write_blk64 [function] [call site] 00234
4 io_channel_write_blk64 [function] [call site] 00235
4 ext2fs_has_feature_64bit [function] [call site] 00236
4 io_channel_write_blk64 [function] [call site] 00237
4 ext2fs_superblock_csum_set [function] [call site] 00238
4 write_primary_superblock [function] [call site] 00239
5 io_channel_write_blk64 [function] [call site] 00240
5 io_channel_write_byte [function] [call site] 00241
3 ext2fs_mmp_stop [function] [call site] 00242
3 ext2fs_free [function] [call site] 00243