Index: sbin/mount/mount.c
===================================================================
--- sbin/mount/mount.c
+++ sbin/mount/mount.c
@@ -541,7 +541,7 @@
 {
 	if (sa->c + 1 == sa->sz) {
 		sa->sz = sa->sz == 0 ? 8 : sa->sz * 2;
-		sa->a = realloc(sa->a, sizeof(sa->a) * sa->sz);
+		sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz);
 		if (sa->a == NULL)
 			errx(1, "realloc failed");
 	}
Index: sbin/umount/umount.c
===================================================================
--- sbin/umount/umount.c
+++ sbin/umount/umount.c
@@ -434,7 +434,7 @@
 {
 	static struct statfs *mntbuf;
 	static size_t mntsize = 0;
-	static char *mntcheck = NULL;
+	static int *mntcheck = NULL;
 	struct statfs *sfs, *foundsfs;
 	int i, count;
 
Index: usr.bin/column/column.c
===================================================================
--- usr.bin/column/column.c
+++ usr.bin/column/column.c
@@ -244,7 +244,7 @@
 		    p = NULL)
 			if (++coloff == maxcols) {
 				if (!(cols = realloc(cols, ((u_int)maxcols +
-				    DEFCOLS) * sizeof(char *))) ||
+				    DEFCOLS) * sizeof(wchar_t *))) ||
 				    !(lens = realloc(lens,
 				    ((u_int)maxcols + DEFCOLS) * sizeof(int))))
 					err(1, NULL);
Index: usr.bin/locate/locate/util.c
===================================================================
--- usr.bin/locate/locate/util.c
+++ usr.bin/locate/locate/util.c
@@ -93,7 +93,7 @@
 	char **pv;
 
 	if (dbv == NULL) {
-		if ((dbv = malloc(sizeof(char **))) == NULL)
+		if ((dbv = malloc(sizeof(char *))) == NULL)
 			err(1, "malloc");
 		*dbv = NULL;
 	}
@@ -123,7 +123,7 @@
 				*(p + slen) = '\0';
 			}
 			/* increase dbv with element p */
-			if ((dbv = realloc(dbv, sizeof(char **) * (vlen + 2)))
+			if ((dbv = realloc(dbv, sizeof(char *) * (vlen + 2)))
 			    == NULL)
 				err(1, "realloc");
 			*(dbv + vlen) = p;
Index: usr.bin/xargs/xargs.c
===================================================================
--- usr.bin/xargs/xargs.c
+++ usr.bin/xargs/xargs.c
@@ -234,7 +234,7 @@
 	 * NULL.
 	 */
 	linelen = 1 + argc + nargs + 1;
-	if ((av = bxp = malloc(linelen * sizeof(char **))) == NULL)
+	if ((av = bxp = malloc(linelen * sizeof(char *))) == NULL)
 		errx(1, "malloc failed");
 
 	/*
@@ -471,7 +471,7 @@
 	 * Allocate memory to hold the argument list, and
 	 * a NULL at the tail.
 	 */
-	tmp = malloc((argc + 1) * sizeof(char**));
+	tmp = malloc((argc + 1) * sizeof(char *));
 	if (tmp == NULL) {
 		warnx("malloc failed");
 		xexit(*argv, 1);