virExec: avoid undefined behavior

* src/util/util.c (__virExec): Don't use FD_ISSET on out-of-bounds fd.

virExec: avoid undefined behavior
* src/util/util.c (__virExec): Don't use FD_ISSET on out-of-bounds fd.
c3568ec2 · Eric Blake · 044f2011 · c3568ec2
隐藏空白更改
内联并排

Showing with 1 addition and 2 deletion

src/util/util.c src/util/util.c +1 -2

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--- a/src/util/util.c
+++ b/src/util/util.c
@@ -570,8 +570,7 @@ __virExec(const char *const*argv,
            i != null &&
            i != childout &&
            i != childerr &&
-            (!keepfd ||
-             !FD_ISSET(i, keepfd))) {
+            (!keepfd || (i < FD_SETSIZE && !FD_ISSET(i, keepfd)))) {
            tmpfd = i;
            VIR_FORCE_CLOSE(tmpfd);
        }