Merge tag '4.19-rc-smb3' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Three small SMB3 fixes, one for stable"
* tag '4.19-rc-smb3' of git://git.samba.org/sfrench/cifs-2.6:
cifs: update internal module version number for cifs.ko to 2.12
cifs: check kmalloc before use
cifs: check if SMB2 PDU size has been padded and suppress the warning
cifs: create a define for how many iovs we need for an SMB2_open()
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index f3a78ef..f047e87 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -148,5 +148,5 @@
extern const struct export_operations cifs_export_ops;
#endif /* CONFIG_CIFS_NFSD_EXPORT */
-#define CIFS_VERSION "2.12"
+#define CIFS_VERSION "2.13"
#endif /* _CIFSFS_H */
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 8b0502c..aa23c00 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -398,6 +398,12 @@
goto setup_ntlmv2_ret;
}
*pbuffer = kmalloc(size_of_ntlmssp_blob(ses), GFP_KERNEL);
+ if (!*pbuffer) {
+ rc = -ENOMEM;
+ cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc);
+ *buflen = 0;
+ goto setup_ntlmv2_ret;
+ }
sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer;
memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c
index 303d459..db045366 100644
--- a/fs/cifs/smb2misc.c
+++ b/fs/cifs/smb2misc.c
@@ -238,6 +238,13 @@
return 0;
/*
+ * Some windows servers (win2016) will pad also the final
+ * PDU in a compound to 8 bytes.
+ */
+ if (((clc_len + 7) & ~7) == len)
+ return 0;
+
+ /*
* MacOS server pads after SMB2.1 write response with 3 bytes
* of junk. Other servers match RFC1001 len to actual
* SMB2/SMB3 frame length (header + smb2 response specific data)
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 5412584..247a98e 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1582,7 +1582,7 @@
struct smb_rqst rqst[3];
int resp_buftype[3];
struct kvec rsp_iov[3];
- struct kvec open_iov[5]; /* 4 + potential padding. */
+ struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
struct kvec qi_iov[1];
struct kvec close_iov[1];
struct cifs_ses *ses = tcon->ses;
@@ -1603,7 +1603,7 @@
memset(&open_iov, 0, sizeof(open_iov));
rqst[0].rq_iov = open_iov;
- rqst[0].rq_nvec = 4;
+ rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 2f19380..5740aa8 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -2256,7 +2256,7 @@
struct TCP_Server_Info *server;
struct cifs_tcon *tcon = oparms->tcon;
struct cifs_ses *ses = tcon->ses;
- struct kvec iov[5]; /* make sure at least one for each open context */
+ struct kvec iov[SMB2_CREATE_IOV_SIZE];
struct kvec rsp_iov = {NULL, 0};
int resp_buftype;
int rc = 0;
@@ -2274,7 +2274,7 @@
memset(&rqst, 0, sizeof(struct smb_rqst));
memset(&iov, 0, sizeof(iov));
rqst.rq_iov = iov;
- rqst.rq_nvec = 5;
+ rqst.rq_nvec = SMB2_CREATE_IOV_SIZE;
rc = SMB2_open_init(tcon, &rqst, oplock, oparms, path);
if (rc)
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index a2eeae9..8fb7887 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -614,6 +614,18 @@
#define SMB2_CREATE_TAG_POSIX 0x93AD25509CB411E7B42383DE968BCD7C
+/*
+ * Maximum number of iovs we need for an open/create request.
+ * [0] : struct smb2_create_req
+ * [1] : path
+ * [2] : lease context
+ * [3] : durable context
+ * [4] : posix context
+ * [5] : time warp context
+ * [6] : compound padding
+ */
+#define SMB2_CREATE_IOV_SIZE 7
+
struct smb2_create_req {
struct smb2_sync_hdr sync_hdr;
__le16 StructureSize; /* Must be 57 */
