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cifs: store the real expected sequence number in the mid 

Currently, the signing routines take a pointer to a place to store the
expected sequence number for the mid response. It then stores a value
that's one below what that sequence number should be, and then adds one
to it when verifying the signature on the response.

Increment the sequence number before storing the value in the mid, and
eliminate the "+1" when checking the signature.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Jeff Layton 2013-04-03 11:55:03 -04:00 committed by Steve French
parent ad313cb86d
commit 0124cc4511
3 changed files with 4 additions and 4 deletions
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4
fs/cifs/cifsencrypt.c
View File

@ -135,8 +135,8 @@ int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server,
cpu_to_le32(server->sequence_number);
cifs_pdu->Signature.Sequence.Reserved = 0;
*pexpected_response_sequence_number = server->sequence_number++;
server->sequence_number++;
*pexpected_response_sequence_number = ++server->sequence_number;
++server->sequence_number;
rc = cifs_calc_signature(rqst, server, smb_signature);
if (rc)

2
fs/cifs/cifssmb.c
View File

@ -1545,7 +1545,7 @@ cifs_readv_callback(struct mid_q_entry *mid)
int rc = 0;
rc = cifs_verify_signature(&rqst, server,
mid->sequence_number + 1);
mid->sequence_number);
if (rc)
cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
rc);

2
fs/cifs/transport.c
View File

@ -622,7 +622,7 @@ cifs_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server,
iov.iov_len = len;
/* FIXME: add code to kill session */
rc = cifs_verify_signature(&rqst, server,
mid->sequence_number + 1);
mid->sequence_number);
if (rc)
cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
rc);