diff options
| author | Jeff Layton <jlayton@redhat.com> | 2013-05-24 07:41:01 -0400 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2013-06-24 01:56:40 -0500 |
| commit | 3534b8508e4b21eec0b7b839f7234a9b6fe27d03 (patch) | |
| tree | abca5bc7bb74168ffb6a8a9ff09cd99a3217f639 | |
| parent | 7d066459697610f6e755a7cfe199c3c6b142fb85 (diff) | |
| download | lwn-3534b8508e4b21eec0b7b839f7234a9b6fe27d03.tar.gz lwn-3534b8508e4b21eec0b7b839f7234a9b6fe27d03.zip | |
cifs: throw a warning if negotiate or sess_setup ops are passed NULL server or session pointers
These look pretty cargo-culty to me, but let's be certain. Leave
them in place for now. Pop a WARN if it ever does happen. Also,
move to a more standard idiom for setting the "server" pointer.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
| -rw-r--r-- | fs/cifs/cifssmb.c | 11 | ||||
| -rw-r--r-- | fs/cifs/sess.c | 4 | ||||
| -rw-r--r-- | fs/cifs/smb2pdu.c | 20 |
3 files changed, 16 insertions, 19 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index a58dc77cc443..c1c2006376a1 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -375,16 +375,15 @@ CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses) int rc = 0; int bytes_returned; int i; - struct TCP_Server_Info *server; + struct TCP_Server_Info *server = ses->server; u16 count; unsigned int secFlags; - if (ses->server) - server = ses->server; - else { - rc = -EIO; - return rc; + if (!server) { + WARN(1, "%s: server is NULL!\n", __func__); + return -EIO; } + rc = smb_init(SMB_COM_NEGOTIATE, 0, NULL /* no tcon yet */ , (void **) &pSMB, (void **) &pSMBr); if (rc) diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index 838e2240fc55..e8c5dc9f3386 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -576,8 +576,10 @@ CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses, u16 blob_len; char *ntlmsspblob = NULL; - if (ses == NULL) + if (ses == NULL) { + WARN(1, "%s: ses == NULL!", __func__); return -EINVAL; + } type = ses->server->secType; cifs_dbg(FYI, "sess setup type %d\n", type); diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 2b95ce2b54e8..3af66aa18d3b 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -328,7 +328,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) struct kvec iov[1]; int rc = 0; int resp_buftype; - struct TCP_Server_Info *server; + struct TCP_Server_Info *server = ses->server; unsigned int sec_flags; u16 temp = 0; int blob_offset, blob_length; @@ -337,11 +337,9 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) cifs_dbg(FYI, "Negotiate protocol\n"); - if (ses->server) - server = ses->server; - else { - rc = -EIO; - return rc; + if (!server) { + WARN(1, "%s: server is NULL!\n", __func__); + return -EIO; } rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req); @@ -480,7 +478,7 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, int rc = 0; int resp_buftype; __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ - struct TCP_Server_Info *server; + struct TCP_Server_Info *server = ses->server; unsigned int sec_flags; u8 temp = 0; u16 blob_length = 0; @@ -490,11 +488,9 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, cifs_dbg(FYI, "Session Setup\n"); - if (ses->server) - server = ses->server; - else { - rc = -EIO; - return rc; + if (!server) { + WARN(1, "%s: server is NULL!\n", __func__); + return -EIO; } /* |