diff --git a/lib/libzfs/libzfs_sendrecv.c b/lib/libzfs/libzfs_sendrecv.c
index 70488aa97..b08cd2b63 100644
--- a/lib/libzfs/libzfs_sendrecv.c
+++ b/lib/libzfs/libzfs_sendrecv.c
@@ -272,6 +272,15 @@ cksummer(void *arg)
 	ofp = fdopen(dda->inputfd, "r");
 	while (ssread(drr, sizeof (*drr), ofp) != 0) {
 
+		/*
+		 * kernel filled in checksum, we are going to write same
+		 * record, but need to regenerate checksum.
+		 */
+		if (drr->drr_type != DRR_BEGIN) {
+			bzero(&drr->drr_u.drr_checksum.drr_checksum,
+			    sizeof (drr->drr_u.drr_checksum.drr_checksum));
+		}
+
 		switch (drr->drr_type) {
 		case DRR_BEGIN:
 		{
diff --git a/lib/libzfs_core/libzfs_core.c b/lib/libzfs_core/libzfs_core.c
index 5924f6762..bd2db2211 100644
--- a/lib/libzfs_core/libzfs_core.c
+++ b/lib/libzfs_core/libzfs_core.c
@@ -84,7 +84,7 @@
 #include <sys/stat.h>
 #include <sys/zfs_ioctl.h>
 
-static int g_fd;
+static int g_fd = -1;
 static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
 static int g_refcount;
 
@@ -109,9 +109,14 @@ libzfs_core_fini(void)
 {
 	(void) pthread_mutex_lock(&g_lock);
 	ASSERT3S(g_refcount, >, 0);
-	g_refcount--;
-	if (g_refcount == 0)
+
+	if (g_refcount > 0)
+		g_refcount--;
+
+	if (g_refcount == 0 && g_fd != -1) {
 		(void) close(g_fd);
+		g_fd = -1;
+	}
 	(void) pthread_mutex_unlock(&g_lock);
 }
 
@@ -125,6 +130,7 @@ lzc_ioctl(zfs_ioc_t ioc, const char *name,
 	size_t size;
 
 	ASSERT3S(g_refcount, >, 0);
+	VERIFY3S(g_fd, !=, -1);
 
 	(void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name));
 
@@ -327,6 +333,9 @@ lzc_exists(const char *dataset)
 	 */
 	zfs_cmd_t zc = {"\0"};
 
+	ASSERT3S(g_refcount, >, 0);
+	VERIFY3S(g_fd, !=, -1);
+
 	(void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
 	return (ioctl(g_fd, ZFS_IOC_OBJSET_STATS, &zc) == 0);
 }
@@ -576,6 +585,9 @@ recv_impl(const char *snapname, nvlist_t *props, const char *origin,
 	char *atp;
 	int error;
 
+	ASSERT3S(g_refcount, >, 0);
+	VERIFY3S(g_fd, !=, -1);
+
 	/* Set 'fsname' to the name of containing filesystem */
 	(void) strlcpy(fsname, snapname, sizeof (fsname));
 	atp = strchr(fsname, '@');