diff --git a/libarchive/archive_read_open_fd.c b/libarchive/archive_read_open_fd.c
index 358e516f..97c944b8 100644
--- a/libarchive/archive_read_open_fd.c
+++ b/libarchive/archive_read_open_fd.c
@@ -109,8 +109,11 @@ archive_read_open_fd(struct archive *a, int fd, size_t block_size)
 	archive_read_set_seek_callback(a, file_seek);
 	archive_read_set_close_callback(a, file_close);
 	r = archive_read_set_callback_data(a, mine);
-	if (r < 0)
+	if (r < 0) {
+		free(mine->buffer);
+		free(mine);
 		return (r);
+	}
 	return (archive_read_open1(a));
 }
 
diff --git a/libarchive/archive_read_open_file.c b/libarchive/archive_read_open_file.c
index e82069e5..f6dcf82f 100644
--- a/libarchive/archive_read_open_file.c
+++ b/libarchive/archive_read_open_file.c
@@ -106,8 +106,11 @@ archive_read_open_FILE(struct archive *a, FILE *f)
 	archive_read_set_seek_callback(a, FILE_seek);
 	archive_read_set_close_callback(a, FILE_close);
 	r = archive_read_set_callback_data(a, mine);
-	if (r < 0)
+	if (r < 0) {
+		free(mine->buffer);
+		free(mine);
 		return (r);
+	}
 	return (archive_read_open1(a));
 }
 
diff --git a/libarchive/archive_read_open_memory.c b/libarchive/archive_read_open_memory.c
index 441662d4..5165d1b7 100644
--- a/libarchive/archive_read_open_memory.c
+++ b/libarchive/archive_read_open_memory.c
@@ -84,8 +84,10 @@ archive_read_open_memory2(struct archive *a, const void *buff,
 	archive_read_set_skip_callback(a, memory_read_skip);
 	archive_read_set_close_callback(a, memory_read_close);
 	r = archive_read_set_callback_data(a, mine);
-	if (r < 0)
+	if (r < 0) {
+		free(mine);
 		return (r);
+	}
 	return (archive_read_open1(a));
 }
 
diff --git a/libarchive/archive_write_open_fd.c b/libarchive/archive_write_open_fd.c
index a7955520..45ec492d 100644
--- a/libarchive/archive_write_open_fd.c
+++ b/libarchive/archive_write_open_fd.c
@@ -48,6 +48,7 @@
 #endif
 
 #include "archive.h"
+#include "archive_private.h"
 
 struct write_fd_data {
 	int		fd;
@@ -62,6 +63,9 @@ archive_write_open_fd(struct archive *a, int fd)
 {
 	struct write_fd_data *mine;
 
+	archive_check_magic(a, ARCHIVE_WRITE_MAGIC,
+	    ARCHIVE_STATE_NEW, "archive_write_open_fd");
+
 	mine = malloc(sizeof(*mine));
 	if (mine == NULL) {
 		archive_set_error(a, ENOMEM, "No memory");
diff --git a/libarchive/archive_write_open_file.c b/libarchive/archive_write_open_file.c
index 6271b368..c4e73fd8 100644
--- a/libarchive/archive_write_open_file.c
+++ b/libarchive/archive_write_open_file.c
@@ -45,6 +45,7 @@
 #endif
 
 #include "archive.h"
+#include "archive_private.h"
 
 struct write_FILE_data {
 	FILE		*f;
@@ -59,6 +60,9 @@ archive_write_open_FILE(struct archive *a, FILE *f)
 {
 	struct write_FILE_data *mine;
 
+	archive_check_magic(a, ARCHIVE_WRITE_MAGIC,
+	    ARCHIVE_STATE_NEW, "archive_write_open_FILE");
+
 	mine = malloc(sizeof(*mine));
 	if (mine == NULL) {
 		archive_set_error(a, ENOMEM, "No memory");
diff --git a/libarchive/archive_write_open_filename.c b/libarchive/archive_write_open_filename.c
index 430de21f..df513260 100644
--- a/libarchive/archive_write_open_filename.c
+++ b/libarchive/archive_write_open_filename.c
@@ -98,6 +98,9 @@ open_filename(struct archive *a, int mbs_fn, const void *filename)
 	struct write_file_data *mine;
 	int r;
 
+	archive_check_magic(a, ARCHIVE_WRITE_MAGIC,
+	    ARCHIVE_STATE_NEW, "open_filename");
+
 	mine = calloc(1, sizeof(*mine));
 	if (mine == NULL) {
 		archive_set_error(a, ENOMEM, "No memory");
diff --git a/libarchive/archive_write_open_memory.c b/libarchive/archive_write_open_memory.c
index 3b929ac7..e88d88c6 100644
--- a/libarchive/archive_write_open_memory.c
+++ b/libarchive/archive_write_open_memory.c
@@ -30,6 +30,7 @@
 #include <string.h>
 
 #include "archive.h"
+#include "archive_private.h"
 
 struct write_memory_data {
 	size_t	used;
@@ -52,6 +53,9 @@ archive_write_open_memory(struct archive *a, void *buff, size_t buffSize, size_t
 {
 	struct write_memory_data *mine;
 
+	archive_check_magic(a, ARCHIVE_WRITE_MAGIC,
+	    ARCHIVE_STATE_NEW, "archive_write_open_memory");
+
 	mine = calloc(1, sizeof(*mine));
 	if (mine == NULL) {
 		archive_set_error(a, ENOMEM, "No memory");