diff --git a/autofs-5.1.7-fix-nonstrict-offset-mount-fail-handling.patch b/autofs-5.1.7-fix-nonstrict-offset-mount-fail-handling.patch
new file mode 100644
index 0000000..184afdf
--- /dev/null
+++ b/autofs-5.1.7-fix-nonstrict-offset-mount-fail-handling.patch
@@ -0,0 +1,54 @@
+autofs-5.1.7 - fix nonstrict offset mount fail handling
+
+From: Ian Kent <raven@themaw.net>
+
+If a triggered offset mount fails automount is not handling nonstrict
+mount failure correctly.
+
+The nonstrict mount failure handling needs to convert an offset mount
+failure to a success if the offset subtree below the failed mount is not
+empty otherwise it must return the failure. The previous implementation
+used -1 to indicate the subtree was empty and that was used to detect
+when the mount should fail instead of converting the fail to a success.
+
+Make the new implementation do the same.
+
+Signed-off-by: Ian Kent <raven@themaw.net>
+---
+ CHANGELOG           |    1 +
+ lib/mounts.c        |    2 +-
+ modules/parse_sun.c |    2 +-
+ 3 files changed, 3 insertions(+), 2 deletions(-)
+
+--- autofs-5.1.7.orig/CHANGELOG
++++ autofs-5.1.7/CHANGELOG
+@@ -76,6 +76,7 @@
+ - fix direct mount deadlock.
+ - fix lookup_prune_one_cache() refactoring change.
+ - add missing description of null map option.
++- fix nonstrict offset mount fail handling.
+ 
+ 25/01/2021 autofs-5.1.7
+ - make bind mounts propagation slave by default.
+--- autofs-5.1.7.orig/lib/mounts.c
++++ autofs-5.1.7/lib/mounts.c
+@@ -1616,7 +1616,7 @@ static int tree_mapent_traverse_subtree(
+ {
+ 	struct traverse_subtree_context *ctxt = ptr;
+ 	struct mapent *oe = MAPENT(n);
+-	int ret = 1;
++	int ret = -1;
+ 
+ 	if (n->left) {
+ 		ret = tree_mapent_traverse_subtree(n->left, work, ctxt);
+--- autofs-5.1.7.orig/modules/parse_sun.c
++++ autofs-5.1.7/modules/parse_sun.c
+@@ -1181,7 +1181,7 @@ static int mount_subtree(struct autofs_p
+ 		 * offsets to be mounted.
+ 		 */
+ 		rv = sun_mount(ap, name, name, namelen, loc, loclen, options, ctxt);
+-		if (rv == 0) {
++		if (rv <= 0) {
+ 			ret = tree_mapent_mount_offsets(me, 1);
+ 			if (!ret) {
+ 				tree_mapent_cleanup_offsets(me);
diff --git a/autofs.spec b/autofs.spec
index 65a2b0a..07fde16 100644
--- a/autofs.spec
+++ b/autofs.spec
@@ -12,7 +12,7 @@
 Summary: A tool for automatically mounting and unmounting filesystems
 Name: autofs
 Version: 5.1.7
-Release: 16%{?dist}
+Release: 17%{?dist}
 Epoch: 1
 License: GPLv2+
 Source: https://www.kernel.org/pub/linux/daemons/autofs/v5/autofs-%{version}-2.tar.gz
@@ -97,6 +97,7 @@ Patch74: autofs-5.1.7-fix-hosts-map-offset-order.patch
 Patch75: autofs-5.1.7-fix-direct-mount-deadlock.patch
 Patch76: autofs-5.1.7-fix-lookup_prune_one_cache-refactoring-change.patch
 Patch77: autofs-5.1.7-add-missing-description-of-null-map-option.patch
+Patch78: autofs-5.1.7-fix-nonstrict-offset-mount-fail-handling.patch
 
 %if %{with_systemd}
 BuildRequires: systemd-units
@@ -240,6 +241,7 @@ echo %{version}-%{release} > .version
 %patch75 -p1
 %patch76 -p1
 %patch77 -p1
+%patch78 -p1
 
 %build
 LDFLAGS=-Wl,-z,now
@@ -348,6 +350,11 @@ fi
 %dir /etc/auto.master.d
 
 %changelog
+* Tue Jun 22 2021 Ian Kent <ikent@redhat.com> - 1:5.1.7-17
+- bz1973892 - /net mount being not cleanly mounted and unmounted
+  - correct patch, fix nonstrict offset mount fail handling.
+- Related: rhbz#1973892
+
 * Mon Jun 14 2021 Ian Kent <ikent@redhat.com> - 1:5.1.7-16
 - bz1965870 - autofs: regression in offset ordering
   - fix offset entries order.