[PATCH AUTOSEL 4.4 13/20] cifs: set domainName when a domain-key is used in multiuser

Sasha Levin
2019-09-04T16:03:49Z

From: Ronnie Sahlberg <lsahlber@redhat.com>

[ Upstream commit f2aee329a68f5a907bcff11a109dfe17c0b41aeb ]

RHBZ: 1710429

When we use a domain-key to authenticate using multiuser we must also set
the domainnmame for the new volume as it will be used and passed to the server
in the NTLMSSP Domain-name.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/cifs/connect.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 9cb72fd40eff3..90e0c51ac0450 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2466,6 +2466,7 @@ static int
cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
{
int rc = 0;
+ int is_domain = 0;
const char *delim, *payload;
char *desc;
ssize_t len;
@@ -2513,6 +2514,7 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
rc = PTR_ERR(key);
goto out_err;
}
+ is_domain = 1;
}

down_read(&key->sem);
@@ -2570,6 +2572,26 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
goto out_key_put;
}

+ /*
+ * If we have a domain key then we must set the domainName in the
+ * for the request.
+ */
+ if (is_domain && ses->domainName) {
+ vol->domainname = kstrndup(ses->domainName,
+ strlen(ses->domainName),
+ GFP_KERNEL);
+ if (!vol->domainname) {
+ cifs_dbg(FYI, "Unable to allocate %zd bytes for "
+ "domain\n", len);
+ rc = -ENOMEM;
+ kfree(vol->username);
+ vol->username = NULL;
+ kfree(vol->password);
+ vol->password = NULL;
+ goto out_key_put;
+ }
+ }
+
out_key_put:
up_read(&key->sem);
key_put(key);
--
2.20.1