diff options
| -rw-r--r-- | fs/cifs/smb2pdu.c | 4 | ||||
| -rw-r--r-- | fs/cifs/smb2pdu.h | 2 |
2 files changed, 5 insertions, 1 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 0e04b577758d..f7741cee2a4c 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -584,8 +584,10 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) SMB2_MAX_BUFFER_SIZE); server->max_read = le32_to_cpu(rsp->MaxReadSize); server->max_write = le32_to_cpu(rsp->MaxWriteSize); - /* BB Do we need to validate the SecurityMode? */ server->sec_mode = le16_to_cpu(rsp->SecurityMode); + if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode) + cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n", + server->sec_mode); server->capabilities = le32_to_cpu(rsp->Capabilities); /* Internal types */ server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index 8b901c69a65a..253e2c7c952f 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -249,6 +249,8 @@ struct smb2_negotiate_req { /* SecurityMode flags */ #define SMB2_NEGOTIATE_SIGNING_ENABLED 0x0001 #define SMB2_NEGOTIATE_SIGNING_REQUIRED 0x0002 +#define SMB2_SEC_MODE_FLAGS_ALL 0x0003 + /* Capabilities flags */ #define SMB2_GLOBAL_CAP_DFS 0x00000001 #define SMB2_GLOBAL_CAP_LEASING 0x00000002 /* Resp only New to SMB2.1 */ |