Make sure that the given CPU range is within the bounds of the OS
glibc provides CPU_SETSIZE as the maximum CPU count.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/options.c b/options.c
index 5bbeb34..c99f102 100644
--- a/options.c
+++ b/options.c
@@ -264,6 +264,7 @@
{
struct thread_data *td = data;
char *cpu, *str, *p;
+ int ret = 0;
CPU_ZERO(&td->o.cpumask);
@@ -292,15 +293,25 @@
if (icpu2 == -1)
icpu2 = icpu;
while (icpu <= icpu2) {
+ if (icpu >= CPU_SETSIZE) {
+ log_err("fio: your OS only supports up to"
+ " %d CPUs\n", (int) CPU_SETSIZE);
+ ret = 1;
+ break;
+ }
+
dprint(FD_PARSE, "set cpu allowed %d\n", icpu);
CPU_SET(atoi(cpu), &td->o.cpumask);
icpu++;
}
+ if (ret)
+ break;
}
free(p);
- td->o.cpumask_set = 1;
- return 0;
+ if (!ret)
+ td->o.cpumask_set = 1;
+ return ret;
}
#endif