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authorvan Hauser <vh@thc.org>2023-03-25 10:47:02 +0100
committerGitHub <noreply@github.com>2023-03-25 10:47:02 +0100
commitb2f9802f9f0f54337c552d83a860f3e1a84d7191 (patch)
tree55108dabbf2c78d51e5c0dd61aa85681aa6053b8 /src
parent478f0bbc1ed4bdb39d365dd9d6c69c10917c8073 (diff)
parente24ae963614ecc0874ab5e8ff370419401292913 (diff)
downloadafl++-b2f9802f9f0f54337c552d83a860f3e1a84d7191.tar.gz
Merge pull request #1680 from yuawn/add_check_for_n_fuzz_update
add check for n_fuzz update
Diffstat (limited to 'src')
-rw-r--r--src/afl-fuzz-bitmap.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/src/afl-fuzz-bitmap.c b/src/afl-fuzz-bitmap.c
index c65dd641..d9c792d1 100644
--- a/src/afl-fuzz-bitmap.c
+++ b/src/afl-fuzz-bitmap.c
@@ -575,8 +575,12 @@ save_if_interesting(afl_state_t *afl, void *mem, u32 len, u8 fault) {
     }
 
     /* For AFLFast schedules we update the new queue entry */
-    afl->queue_top->n_fuzz_entry = cksum % N_FUZZ_SIZE;
-    afl->n_fuzz[afl->queue_top->n_fuzz_entry] = 1;
+    if (likely(cksum)) {
+
+      afl->queue_top->n_fuzz_entry = cksum % N_FUZZ_SIZE;
+      afl->n_fuzz[afl->queue_top->n_fuzz_entry] = 1;
+
+    }
 
     /* Try to calibrate inline; this also calls update_bitmap_score() when
        successful. */