ExternalVendorCode/AFLplusplus
1
0
Fork 0
mirror of https://github.com/AFLplusplus/AFLplusplus.git synced 2025-06-15 11:28:08 +00:00
Code Issues Packages Projects Releases Wiki Activity

Allow the custom mutator to generate larger trimmed data (#463)

Browse Source
This commit is contained in:
Shengtuo Hu
2020-07-21 18:00:21 -04:00
committed by GitHub
parent 6c163910ee
commit d90328f6be
1 changed files with 17 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
src/afl-fuzz-mutators.c
View File

@ -282,9 +282,23 @@ u8 trim_case_custom(afl_state_t *afl, struct queue_entry *q, u8 *in_buf,
} else if (unlikely(retlen > orig_len)) { } else if (unlikely(retlen > orig_len)) {
FATAL( /* Do not exit the fuzzer, even if the trimmed data returned by the custom
"Trimmed data returned by custom mutator is larger than original " mutator is larger than the original data. For some use cases, like the
"data"); grammar mutator, the definition of "size" may have different meanings.
For example, the trimming function in a grammar mutator aims at
reducing the objects in a grammar structure, but does not guarantee to
generate a smaller binary buffer.
Thus, we allow the custom mutator to generate the trimmed data that is
larger than the original data. */
if (afl->not_on_tty && afl->debug) {
WARNF(
"Trimmed data returned by custom mutator is larger than original "
"data");
}
} else if (unlikely(retlen == 0)) { } else if (unlikely(retlen == 0)) {