diff --git a/src/util-io.c b/src/util-io.c
index 7b39b6c..f3f7af8 100644
--- a/src/util-io.c
+++ b/src/util-io.c
@@ -126,11 +126,8 @@ struct iobuf {
 struct iobuf *
 iobuf_new(size_t size)
 {
-	struct iobuf *buf = malloc(sizeof(*buf));
-	uint8_t *data = malloc(size);
-
-	assert(buf);
-	assert(data);
+	struct iobuf *buf = xalloc(sizeof(*buf));
+	uint8_t *data = xalloc(size);
 
 	*buf = (struct iobuf){
 		.sz = size,
@@ -212,8 +209,7 @@ iobuf_take_fd(struct iobuf *buf)
 static inline void
 iobuf_resize(struct iobuf *buf, size_t to_size)
 {
-	uint8_t *newdata = realloc(buf->data, to_size);
-	assert(newdata);
+	uint8_t *newdata = xrealloc(buf->data, to_size);
 
 	buf->data = newdata;
 	buf->sz = to_size;
diff --git a/src/util-strings.c b/src/util-strings.c
index 656426d..71a3387 100644
--- a/src/util-strings.c
+++ b/src/util-strings.c
@@ -214,9 +214,7 @@ strreplace(const char *string, const char *separator, const char *replacement)
 		destptr += len;
 	}
 
-	void *tmp = realloc(r, (destptr - r) + 1);
-	assert(tmp);
-	return tmp;
+	return xrealloc(r, (destptr - r) + 1);
 }
 
 size_t
@@ -240,9 +238,7 @@ strv_append_take(char **strv, char **str)
 		size_t len = strv_len(strv) + 1;
 		len = max(len, 2);
 
-		char **s = realloc(strv, len * sizeof(*strv));
-		if (!s)
-			abort();
+		char **s = xrealloc(strv, len * sizeof(*strv));
 		s[len - 1] = NULL;
 		s[len - 2] = *str;
 		*str = NULL;
diff --git a/src/util-strings.h b/src/util-strings.h
index 74b7f38..f82874d 100644
--- a/src/util-strings.h
+++ b/src/util-strings.h
@@ -441,11 +441,11 @@ cmdline_as_str(void)
 	if (sysctl(mib, ARRAY_LENGTH(mib), NULL, &len, NULL, 0))
 		return NULL;
 
-	char *const procargs = malloc(len);
+	_cleanup_free_ char *procargs = xalloc(len);
 	if (sysctl(mib, ARRAY_LENGTH(mib), procargs, &len, NULL, 0))
 		return NULL;
 
-	return procargs;
+	return steal(&procargs);
 #else
 	int fd = open("/proc/self/cmdline", O_RDONLY);
 	if (fd != -1) {