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-rw-r--r--fs/cifs/smb2pdu.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index c399e09b76e6..8e4a1da95418 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1628,9 +1628,13 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
iov[1].iov_base = unc_path;
iov[1].iov_len = unc_path_len;
- /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
+ /*
+ * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
+ * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
+ */
if ((ses->server->dialect == SMB311_PROT_ID) &&
- !smb3_encryption_required(tcon))
+ !smb3_encryption_required(tcon) &&
+ !(ses->session_flags & (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)))
req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
memset(&rqst, 0, sizeof(struct smb_rqst));