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authorTobias Scharnowski <tobias.scharnowski@rub.de>2022-06-10 18:38:37 +0200
committerGitHub <noreply@github.com>2022-06-10 18:38:37 +0200
commitb595727f2fe42dcd2e85a733fd2f2c321920b0d2 (patch)
tree244ca0f2431f46331a272b9f1e0d78897565618a /src/afl-fuzz-one.c
parentba3c7bfe40f9b17a691958e3525828385127ad25 (diff)
downloadafl++-b595727f2fe42dcd2e85a733fd2f2c321920b0d2.tar.gz
Fix Byte Decrement Havoc Mutation
While looking at the source code of the havoc mutations I realized that there seems to be a typo / copy+paste error with the SUBBYTE_ mutation. It is currently incrementing, instead of decrementing the value.

Alternative Fix: Change the documentation to "/* Decrease byte by minus 1. */" to make it work as documented :-P
Diffstat (limited to 'src/afl-fuzz-one.c')
-rw-r--r--src/afl-fuzz-one.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/afl-fuzz-one.c b/src/afl-fuzz-one.c
index 19f41ebe..ef80524f 100644
--- a/src/afl-fuzz-one.c
+++ b/src/afl-fuzz-one.c
@@ -2585,7 +2585,7 @@ havoc_stage:
           snprintf(afl->m_tmp, sizeof(afl->m_tmp), " SUBBYTE_");
           strcat(afl->mutation, afl->m_tmp);
 #endif
-          out_buf[rand_below(afl, temp_len)]++;
+          out_buf[rand_below(afl, temp_len)]--;
           break;
 
         }