ext_cache_init(&cache);
- if (blocksize <= 0)
- return -1;
-
/* Adjust len so it we can't read past the end of the file. */
if (len + pos > filesize)
len = (filesize - pos);
+ if (blocksize <= 0 || len <= 0) {
+ ext_cache_fini(&cache);
+ return -1;
+ }
+
blockcnt = lldiv(((len + pos) + blocksize - 1), blocksize);
for (i = lldiv(pos, blocksize); i < blockcnt; i++) {