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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Jeff Layton <jlayton@kernel.org>,
        Ilya Dryomov <idryomov@gmail.com>
Subject: [PATCH 5.15 023/171] ceph: properly put ceph_string reference after async create attempt
Date:   Mon, 31 Jan 2022 11:54:48 +0100
Message-Id: <20220131105230.806451264@linuxfoundation.org>
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References: <20220131105229.959216821@linuxfoundation.org>
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From: Jeff Layton <jlayton@kernel.org>

commit 932a9b5870d38b87ba0a9923c804b1af7d3605b9 upstream.

The reference acquired by try_prep_async_create is currently leaked.
Ensure we put it.

Cc: stable@vger.kernel.org
Fixes: 9a8d03ca2e2c ("ceph: attempt to do async create when possible")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/ceph/file.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -744,8 +744,10 @@ retry:
 				restore_deleg_ino(dir, req->r_deleg_ino);
 				ceph_mdsc_put_request(req);
 				try_async = false;
+				ceph_put_string(rcu_dereference_raw(lo.pool_ns));
 				goto retry;
 			}
+			ceph_put_string(rcu_dereference_raw(lo.pool_ns));
 			goto out_req;
 		}
 	}