Fix off-by-one in cpu mask index handling

[fio.git] / options.c

diff --git a/options.c b/options.c
index 017920e14031357e9ae2aae6dca977b64ced62fc..b5195c35c7e4bae7991d66b8c83b89c1f644bf58 100644 (file)
--- a/options.c
+++ b/options.c
@@ -443,9 +443,9 @@ static int str_cpumask_cb(void *data, unsigned long long *val)
 
        for (i = 0; i < sizeof(int) * 8; i++) {
                if ((1 << i) & *val) {
-                       if (i > max_cpu) {
+                       if (i >= max_cpu) {
                                log_err("fio: CPU %d too large (max=%ld)\n", i,
-                                                               max_cpu);
+                                                               max_cpu - 1);
                                return 1;
                        }
                        dprint(FD_PARSE, "set cpu allowed %d\n", i);