linux-kernel - [PATCH] ceph: fix memory leak in mount error path when using test_dummy

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Date:   Thu,  3 Nov 2022 15:36:19 +0000
From:   Luís Henriques <lhenriques@...e.de>
To:     Xiubo Li <xiubli@...hat.com>, Ilya Dryomov <idryomov@...il.com>,
        Jeff Layton <jlayton@...nel.org>
Cc:     ceph-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Luís Henriques <lhenriques@...e.de>
Subject: [PATCH] ceph: fix memory leak in mount error path when using test_dummy_encryption

Because ceph_init_fs_context() will never be invoced in case we get a
mount error, destroy_mount_options() won't be releasing fscrypt resources
with fscrypt_free_dummy_policy().  This will result in a memory leak.  Add
an invocation to this function in the mount error path.

Signed-off-by: Luís Henriques <lhenriques@...e.de>
---
 fs/ceph/super.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 2224d44d21c0..6b9fd04b25cd 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -1362,6 +1362,7 @@ static int ceph_get_tree(struct fs_context *fc)
 
 	ceph_mdsc_close_sessions(fsc->mdsc);
 	deactivate_locked_super(sb);
+	fscrypt_free_dummy_policy(&fsc->fsc_dummy_enc_policy);
 	goto out_final;
 
 out: