From: Luis Henriques (SUSE) <luis.henriques@linux.dev>
Date: Mon, 19 Aug 2024 09:52:17 +0000 (+0100)
Subject: ceph: fix a memory leak on cap_auths in MDS client
X-Git-Tag: v6.11.3~542
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1bb86b02bcd63a2c929122d9ce761457a5d267da;p=thirdparty%2Fkernel%2Fstable.git

ceph: fix a memory leak on cap_auths in MDS client

[ Upstream commit d97079e97eab20e08afc507f2bed4501e2824717 ]

The cap_auths that are allocated during an MDS session opening are never
released, causing a memory leak detected by kmemleak.  Fix this by freeing
the memory allocated when shutting down the MDS client.

Fixes: 1d17de9534cb ("ceph: save cap_auths in MDS client when session is opened")
Signed-off-by: Luis Henriques (SUSE) <luis.henriques@linux.dev>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 276e34ab3e2cc..2e4b3ee7446c8 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -6015,6 +6015,18 @@ static void ceph_mdsc_stop(struct ceph_mds_client *mdsc)
 		ceph_mdsmap_destroy(mdsc->mdsmap);
 	kfree(mdsc->sessions);
 	ceph_caps_finalize(mdsc);
+
+	if (mdsc->s_cap_auths) {
+		int i;
+
+		for (i = 0; i < mdsc->s_cap_auths_num; i++) {
+			kfree(mdsc->s_cap_auths[i].match.gids);
+			kfree(mdsc->s_cap_auths[i].match.path);
+			kfree(mdsc->s_cap_auths[i].match.fs_name);
+		}
+		kfree(mdsc->s_cap_auths);
+	}
+
 	ceph_pool_perm_destroy(mdsc);
 }