fix off-by-one in bounds check in fpathconf

this error resulted in an out-of-bounds read, as opposed to a reported
error, when calling the function with an argument one greater than the
max valid index.

diff --git a/src/conf/fpathconf.c b/src/conf/fpathconf.c
index 28c4345..8eb037e 100644 (file)
--- a/src/conf/fpathconf.c
+++ b/src/conf/fpathconf.c
@@ -27,7 +27,7 @@ long fpathconf(int fd, int name)
                [_PC_SYMLINK_MAX] = SYMLINK_MAX,
                [_PC_2_SYMLINKS] = 1
        };
-       if (name > sizeof(values)/sizeof(values[0])) {
+       if (name >= sizeof(values)/sizeof(values[0])) {
                errno = EINVAL;
                return -1;
        }