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 <[email protected]> --- fs/cifs/cifsencrypt.c | 4 ++-- fs/cifs/cifssmb.c | 2 +- fs/cifs/transport.c | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c index 2cbbec6..71436d1 100644 --- a/fs/cifs/cifsencrypt.c +++ b/fs/cifs/cifsencrypt.c @@ -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) diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 076d7ed..4060c45 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -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); diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 293d2c8..bfbf470 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -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); -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
