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| author | van Hauser <vh@thc.org> | 2023-12-24 11:08:26 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-12-24 11:08:26 +0100 |
| commit | dcb5bc3fa5b48b316719cb6abab856697dc29bda (patch) | |
| tree | 71f058cf819e53307ef24c5092b38b72f5b321fe /include/afl-mutations.h | |
| parent | 108fb0b29ad1586e668ba23e23a0eb1a13c45c49 (diff) | |
| parent | daaefcddc063b356018c29027494a00bcfc3e240 (diff) | |
| download | afl++-dcb5bc3fa5b48b316719cb6abab856697dc29bda.tar.gz | |
Merge pull request #1941 from AFLplusplus/dev
push to stable
Diffstat (limited to 'include/afl-mutations.h')
| -rw-r--r-- | include/afl-mutations.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/include/afl-mutations.h b/include/afl-mutations.h index 6338c93c..75e66484 100644 --- a/include/afl-mutations.h +++ b/include/afl-mutations.h @@ -1082,6 +1082,7 @@ u32 mutation_strategy_exploration_binary[MUT_STRATEGY_ARRAY_SIZE] = { MUT_CLONE_COPY, MUT_CLONE_COPY, MUT_CLONE_COPY, + MUT_CLONE_COPY, MUT_CLONE_FIXED, MUT_CLONE_FIXED, MUT_CLONE_FIXED, @@ -2490,12 +2491,13 @@ inline u32 afl_mutate(afl_state_t *afl, u8 *buf, u32 len, u32 steps, case MUT_INSERTASCIINUM: { - u32 len = 1 + rand_below(afl, 8); + u32 ins_len = 1 + rand_below(afl, 8); u32 pos = rand_below(afl, len); /* Insert ascii number. */ - if (unlikely(len < pos + len)) { + if (unlikely(len < pos + ins_len)) { + // no retry if we have a small input if (unlikely(len < 8)) { break; @@ -2511,7 +2513,20 @@ inline u32 afl_mutate(afl_state_t *afl, u8 *buf, u32 len, u32 steps, u64 val = rand_next(afl); char numbuf[32]; snprintf(numbuf, sizeof(numbuf), "%llu", val); - memcpy(buf + pos, numbuf, len); + size_t val_len = strlen(numbuf), off; + + if (ins_len > val_len) { + + ins_len = val_len; + off = 0; + + } else { + + off = val_len - ins_len; + + } + + memcpy(buf + pos, numbuf + off, ins_len); break; |