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cifs: print error code if smb signature verification fails

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While trying to debug a SMB signature related issue with Windows Servers
figured out it might be easier to debug if we print the error code from
cifs_verify_signature(). Also, fix indendation while at it.

Signed-off-by: Suresh Jayaraman <sjayaraman@suse.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Steve French 2012-08-03 09:42:45 -05:00
parent 7411286088
commit 985e4ff016
2 changed files with 14 additions and 6 deletions
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11
fs/cifs/cifssmb.c
View File

@ -1576,9 +1576,14 @@ cifs_readv_callback(struct mid_q_entry *mid)
/* result already set, check signature */
if (server->sec_mode &
(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
if (cifs_verify_signature(rdata->iov, rdata->nr_iov,
server, mid->sequence_number + 1))
cERROR(1, "Unexpected SMB signature");
int rc = 0;
rc = cifs_verify_signature(rdata->iov, rdata->nr_iov,
server,
mid->sequence_number + 1);
if (rc)
cERROR(1, "SMB signature verification returned "
"error = %d", rc);
}
/* FIXME: should this be counted toward the initiating task? */
task_io_account_read(rdata->bytes);

9
fs/cifs/transport.c
View File

@ -503,13 +503,16 @@ cifs_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server,
/* convert the length into a more usable form */
if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
struct kvec iov;
int rc = 0;
iov.iov_base = mid->resp_buf;
iov.iov_len = len;
/* FIXME: add code to kill session */
if (cifs_verify_signature(&iov, 1, server,
mid->sequence_number + 1) != 0)
cERROR(1, "Unexpected SMB signature");
rc = cifs_verify_signature(&iov, 1, server,
mid->sequence_number + 1);
if (rc)
cERROR(1, "SMB signature verification returned error = "
"%d", rc);
}
/* BB special case reconnect tid and uid here? */