Merge pull request #2545 from ljagiello/integer-overflow

src/lxc/storage/loop.c

@@ -297,6 +297,7 @@ int loop_umount(struct lxc_storage *bdev)
 static int do_loop_create(const char *path, uint64_t size, const char *fstype)
 {
 	int fd, ret;
+	off_t ret_size;
 	char cmd_output[MAXPATHLEN];
 	const char *cmd_args[2] = {fstype, path};
 
@@ -307,8 +308,8 @@ static int do_loop_create(const char *path, uint64_t size, const char *fstype)
 		return -1;
 	}
 
-	ret = lseek(fd, size, SEEK_SET);
-	if (ret < 0) {
+	ret_size = lseek(fd, size, SEEK_SET);
+	if (ret_size < 0) {
 		SYSERROR("Failed to seek to set new loop file size for loop "
 			 "file \"%s\"", path);
 		close(fd);