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-rw-r--r--src/afl-fuzz.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c
index 9ca88b5b..78d9da71 100644
--- a/src/afl-fuzz.c
+++ b/src/afl-fuzz.c
@@ -212,7 +212,7 @@ static void usage(u8 *argv0, int more_help) {
" -e ext - file extension for the fuzz test input file (if "
"needed)\n"
" -u - interval to update fuzzer_stats file in seconds, "
- "defaults to 60 sec\n"
+ "defaults to 60 sec, minimum interval: 1 sec\n"
"\n",
argv0, EXEC_TIMEOUT, MEM_LIMIT, MAX_FILE, FOREIGN_SYNCS_MAX);
@@ -673,6 +673,8 @@ int main(int argc, char **argv_orig, char **envp) {
}
+ if (stats_update_freq_sec < 1) { FATAL("-u interval must be >= 1"); }
+
afl->stats_file_update_freq_msecs = stats_update_freq_sec * 1000;
break;