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fix oob flip_bit in mopt code

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This commit is contained in:
Andrea Fioraldi
2020-02-21 17:51:38 +01:00
parent 7323833888
commit 249cd2c766
1 changed files with 2 additions and 2 deletions
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4
src/afl-fuzz-one.c
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@ -3714,7 +3714,7 @@ pacemaker_fuzzing:
case 1: case 1:
if (temp_len < 2) break; if (temp_len < 2) break;
temp_len_puppet = UR(temp_len << 3); temp_len_puppet = UR((temp_len << 3) -1);
FLIP_BIT(out_buf, temp_len_puppet); FLIP_BIT(out_buf, temp_len_puppet);
FLIP_BIT(out_buf, temp_len_puppet + 1); FLIP_BIT(out_buf, temp_len_puppet + 1);
MOpt_globals.cycles_v2[STAGE_FLIP2] += 1; MOpt_globals.cycles_v2[STAGE_FLIP2] += 1;
@ -3722,7 +3722,7 @@ pacemaker_fuzzing:
case 2: case 2:
if (temp_len < 2) break; if (temp_len < 2) break;
temp_len_puppet = UR(temp_len << 3); temp_len_puppet = UR((temp_len << 3) -3);
FLIP_BIT(out_buf, temp_len_puppet); FLIP_BIT(out_buf, temp_len_puppet);
FLIP_BIT(out_buf, temp_len_puppet + 1); FLIP_BIT(out_buf, temp_len_puppet + 1);
FLIP_BIT(out_buf, temp_len_puppet + 2); FLIP_BIT(out_buf, temp_len_puppet + 2);