From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 25 Oct 2019 00:03:11 -0400
Subject: autofs: fix a leak in autofs_expire_indirect()
Git-commit: 03ad0d703df75c43f78bd72e16124b5b94a95188
Patch-mainline: 5.4-rc8
References: bnc#1151927 5.3.16

if the second call of should_expire() in there ends up
grabbing and returning a new reference to dentry, we need
to drop it before continuing.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/autofs/expire.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/fs/autofs/expire.c
+++ b/fs/autofs/expire.c
@@ -498,9 +498,10 @@ static struct dentry *autofs_expire_indi
 		 */
 		how &= ~AUTOFS_EXP_LEAVES;
 		found = should_expire(expired, mnt, timeout, how);
-		if (!found || found != expired)
-			/* Something has changed, continue */
+		if (found != expired) { // something has changed, continue
+			dput(found);
 			goto next;
+		}
 
 		if (expired != dentry)
 			dput(dentry);