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cifs: match secType when searching for existing tcp session

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The secType is a per-tcp session entity, but the current routine doesn't
verify that it is acceptible when attempting to match an existing TCP
session.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton 2010-07-06 20:43:02 -04:00 committed by Steve French
parent 4515148ef7
commit daf5b0b6f3
2 changed files with 54 additions and 4 deletions
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3
fs/cifs/cifsglob.h
View File

@ -83,8 +83,7 @@ enum statusEnum {
};
enum securityEnum {
PLAINTXT = 0, /* Legacy with Plaintext passwords */
LANMAN, /* Legacy LANMAN auth */
LANMAN = 0, /* Legacy LANMAN auth */
NTLM, /* Legacy NTLM012 auth with NTLM hash */
NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */

55
fs/cifs/connect.c
View File

@ -1412,8 +1412,56 @@ match_address(struct TCP_Server_Info *server, struct sockaddr *addr)
return true;
}
static bool
match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
{
unsigned int secFlags;
if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
secFlags = vol->secFlg;
else
secFlags = global_secflags | vol->secFlg;
switch (server->secType) {
case LANMAN:
if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
return false;
break;
case NTLMv2:
if (!(secFlags & CIFSSEC_MAY_NTLMV2))
return false;
break;
case NTLM:
if (!(secFlags & CIFSSEC_MAY_NTLM))
return false;
break;
case Kerberos:
if (!(secFlags & CIFSSEC_MAY_KRB5))
return false;
break;
case RawNTLMSSP:
if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
return false;
break;
default:
/* shouldn't happen */
return false;
}
/* now check if signing mode is acceptible */
if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
(server->secMode & SECMODE_SIGN_REQUIRED))
return false;
else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
(server->secMode &
(SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
return false;
return true;
}
static struct TCP_Server_Info *
cifs_find_tcp_session(struct sockaddr *addr)
cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
{
struct TCP_Server_Info *server;
@ -1431,6 +1479,9 @@ cifs_find_tcp_session(struct sockaddr *addr)
if (!match_address(server, addr))
continue;
if (!match_security(server, vol))
continue;
++server->srv_count;
write_unlock(&cifs_tcp_ses_lock);
cFYI(1, "Existing tcp session with server found");
@ -1501,7 +1552,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
}
/* see if we already have a matching tcp_ses */
tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr);
tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
if (tcp_ses)
return tcp_ses;