diff options
| -rw-r--r-- | fs/cifs/transport.c | 139 |
1 files changed, 72 insertions, 67 deletions
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 01b3aa5f928b..ca015e60002a 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -619,49 +619,52 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses, cERROR(1, ("Frame too large received. Length: %d Xid: %d", receive_len, xid)); rc = -EIO; - } else { /* rcvd frame is ok */ - if (midQ->resp_buf && - (midQ->midState == MID_RESPONSE_RECEIVED)) { + goto out; + } - iov[0].iov_base = (char *)midQ->resp_buf; - if (midQ->largeBuf) - *pRespBufType = CIFS_LARGE_BUFFER; - else - *pRespBufType = CIFS_SMALL_BUFFER; - iov[0].iov_len = receive_len + 4; + /* rcvd frame is ok */ - dump_smb(midQ->resp_buf, 80); - /* convert the length into a more usable form */ - if ((receive_len > 24) && - (ses->server->secMode & (SECMODE_SIGN_REQUIRED | - SECMODE_SIGN_ENABLED))) { - rc = cifs_verify_signature(midQ->resp_buf, + if (midQ->resp_buf && + (midQ->midState == MID_RESPONSE_RECEIVED)) { + + iov[0].iov_base = (char *)midQ->resp_buf; + if (midQ->largeBuf) + *pRespBufType = CIFS_LARGE_BUFFER; + else + *pRespBufType = CIFS_SMALL_BUFFER; + iov[0].iov_len = receive_len + 4; + + dump_smb(midQ->resp_buf, 80); + /* convert the length into a more usable form */ + if ((receive_len > 24) && + (ses->server->secMode & (SECMODE_SIGN_REQUIRED | + SECMODE_SIGN_ENABLED))) { + rc = cifs_verify_signature(midQ->resp_buf, &ses->server->mac_signing_key, midQ->sequence_number+1); - if (rc) { - cERROR(1, ("Unexpected SMB signature")); - /* BB FIXME add code to kill session */ - } + if (rc) { + cERROR(1, ("Unexpected SMB signature")); + /* BB FIXME add code to kill session */ } - - /* BB special case reconnect tid and uid here? */ - rc = map_smb_to_linux_error(midQ->resp_buf, - flags & CIFS_LOG_ERROR); - - /* convert ByteCount if necessary */ - if (receive_len >= sizeof(struct smb_hdr) - 4 - /* do not count RFC1001 header */ + - (2 * midQ->resp_buf->WordCount) + 2 /* bcc */ ) - BCC(midQ->resp_buf) = - le16_to_cpu(BCC_LE(midQ->resp_buf)); - if ((flags & CIFS_NO_RESP) == 0) - midQ->resp_buf = NULL; /* mark it so buf will - not be freed by - DeleteMidQEntry */ - } else { - rc = -EIO; - cFYI(1, ("Bad MID state?")); } + + /* BB special case reconnect tid and uid here? */ + rc = map_smb_to_linux_error(midQ->resp_buf, + flags & CIFS_LOG_ERROR); + + /* convert ByteCount if necessary */ + if (receive_len >= sizeof(struct smb_hdr) - 4 + /* do not count RFC1001 header */ + + (2 * midQ->resp_buf->WordCount) + 2 /* bcc */ ) + BCC(midQ->resp_buf) = + le16_to_cpu(BCC_LE(midQ->resp_buf)); + if ((flags & CIFS_NO_RESP) == 0) + midQ->resp_buf = NULL; /* mark it so buf will + not be freed by + DeleteMidQEntry */ + } else { + rc = -EIO; + cFYI(1, ("Bad MID state?")); } out: @@ -809,43 +812,45 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses, cERROR(1, ("Frame too large received. Length: %d Xid: %d", receive_len, xid)); rc = -EIO; - } else { /* rcvd frame is ok */ - - if (midQ->resp_buf && out_buf - && (midQ->midState == MID_RESPONSE_RECEIVED)) { - out_buf->smb_buf_length = receive_len; - memcpy((char *)out_buf + 4, - (char *)midQ->resp_buf + 4, - receive_len); + goto out; + } - dump_smb(out_buf, 92); - /* convert the length into a more usable form */ - if ((receive_len > 24) && - (ses->server->secMode & (SECMODE_SIGN_REQUIRED | - SECMODE_SIGN_ENABLED))) { - rc = cifs_verify_signature(out_buf, + /* rcvd frame is ok */ + + if (midQ->resp_buf && out_buf + && (midQ->midState == MID_RESPONSE_RECEIVED)) { + out_buf->smb_buf_length = receive_len; + memcpy((char *)out_buf + 4, + (char *)midQ->resp_buf + 4, + receive_len); + + dump_smb(out_buf, 92); + /* convert the length into a more usable form */ + if ((receive_len > 24) && + (ses->server->secMode & (SECMODE_SIGN_REQUIRED | + SECMODE_SIGN_ENABLED))) { + rc = cifs_verify_signature(out_buf, &ses->server->mac_signing_key, midQ->sequence_number+1); - if (rc) { - cERROR(1, ("Unexpected SMB signature")); - /* BB FIXME add code to kill session */ - } + if (rc) { + cERROR(1, ("Unexpected SMB signature")); + /* BB FIXME add code to kill session */ } + } - *pbytes_returned = out_buf->smb_buf_length; + *pbytes_returned = out_buf->smb_buf_length; - /* BB special case reconnect tid and uid here? */ - rc = map_smb_to_linux_error(out_buf, 0 /* no log */ ); + /* BB special case reconnect tid and uid here? */ + rc = map_smb_to_linux_error(out_buf, 0 /* no log */ ); - /* convert ByteCount if necessary */ - if (receive_len >= sizeof(struct smb_hdr) - 4 - /* do not count RFC1001 header */ + - (2 * out_buf->WordCount) + 2 /* bcc */ ) - BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf)); - } else { - rc = -EIO; - cERROR(1, ("Bad MID state?")); - } + /* convert ByteCount if necessary */ + if (receive_len >= sizeof(struct smb_hdr) - 4 + /* do not count RFC1001 header */ + + (2 * out_buf->WordCount) + 2 /* bcc */ ) + BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf)); + } else { + rc = -EIO; + cERROR(1, ("Bad MID state?")); } out: |