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[2003:dc:6f12:b600:230:64ff:fe74:809]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5d01ffd96e4sm1590029a12.60.2024.11.22.23.21.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Nov 2024 23:21:23 -0800 (PST) From: Max Kellermann To: xiubli@redhat.com, idryomov@gmail.com, ceph-devel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org, Max Kellermann Subject: [PATCH 1/2] fs/ceph/mds_client: pass cred pointer to ceph_mds_auth_match() Date: Sat, 23 Nov 2024 08:21:20 +0100 Message-ID: <20241123072121.1897163-1-max.kellermann@ionos.com> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: ceph-devel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This eliminates a redundant get_current_cred() call, because ceph_mds_check_access() has already obtained this pointer. As a side effect, this also fixes a reference leak in ceph_mds_auth_match(): by omitting the get_current_cred() call, no additional cred reference is taken. Fixes: 596afb0b8933 ("ceph: add ceph_mds_check_access() helper") Cc: stable@vger.kernel.org Signed-off-by: Max Kellermann Reviewed-by: Xiubo Li --- fs/ceph/mds_client.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 6baec1387f7d..e8a5994de8b6 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -5615,9 +5615,9 @@ void send_flush_mdlog(struct ceph_mds_session *s) static int ceph_mds_auth_match(struct ceph_mds_client *mdsc, struct ceph_mds_cap_auth *auth, + const struct cred *cred, char *tpath) { - const struct cred *cred = get_current_cred(); u32 caller_uid = from_kuid(&init_user_ns, cred->fsuid); u32 caller_gid = from_kgid(&init_user_ns, cred->fsgid); struct ceph_client *cl = mdsc->fsc->client; @@ -5740,7 +5740,7 @@ int ceph_mds_check_access(struct ceph_mds_client *mdsc, char *tpath, int mask) for (i = 0; i < mdsc->s_cap_auths_num; i++) { struct ceph_mds_cap_auth *s = &mdsc->s_cap_auths[i]; - err = ceph_mds_auth_match(mdsc, s, tpath); + err = ceph_mds_auth_match(mdsc, s, cred, tpath); if (err < 0) { return err; } else if (err > 0) {