Fix allocation errors, detected using ASAN

The test for VDEV_TYPE_INDIRECT is done after a memory allocation, and
could return from function without freeing it.  Since we don't need that
allocation yet, just postpone it.

Add a missing free() when buffer is no longer needed.

Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: João Carlos Mendes Luís <jonny@jonny.eng.br>
Closes openzfs#10193 
(cherry picked from commit 75c6201)

cmd/zpool/zpool_main.c

@@ -4395,11 +4395,11 @@ print_vdev_stats(zpool_handle_t *zhp, const char *name, nvlist_t *oldnv,
 	uint64_t tdelta;
 	double scale;
 
-	calcvs = safe_malloc(sizeof (*calcvs));
-
 	if (strcmp(name, VDEV_TYPE_INDIRECT) == 0)
 		return (ret);
 
+	calcvs = safe_malloc(sizeof (*calcvs));
+
 	if (oldnv != NULL) {
 		verify(nvlist_lookup_uint64_array(oldnv,
 		    ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&oldvs, &c) == 0);
@@ -7387,6 +7387,7 @@ print_removal_status(zpool_handle_t *zhp, pool_removal_stat_t *prs)
 			    ", (copy is slow, no estimated time)\n"));
 		}
 	}
+	free(vdev_name);
 
 	if (prs->prs_mapping_memory > 0) {
 		char mem_buf[7];