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path: root/fs/cifs/smb2pdu.c
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Diffstat (limited to 'fs/cifs/smb2pdu.c')
-rw-r--r--fs/cifs/smb2pdu.c57
1 files changed, 48 insertions, 9 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 63778ac22fd9..f7741cee2a4c 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -453,6 +453,10 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
return rc;
req->sync_hdr.SessionId = 0;
+#ifdef CONFIG_CIFS_SMB311
+ memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
+ memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
+#endif
if (strcmp(ses->server->vals->version_string,
SMB3ANY_VERSION_STRING) == 0) {
@@ -564,6 +568,15 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
/* BB: add check that dialect was valid given dialect(s) we asked for */
+#ifdef CONFIG_CIFS_SMB311
+ /*
+ * Keep a copy of the hash after negprot. This hash will be
+ * the starting hash value for all sessions made from this
+ * server.
+ */
+ memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
+ SMB2_PREAUTH_HASH_SIZE);
+#endif
/* SMB2 only has an extended negflavor */
server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
/* set it to the maximum buffer size value we can send with 1 credit */
@@ -571,8 +584,10 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
SMB2_MAX_BUFFER_SIZE);
server->max_read = le32_to_cpu(rsp->MaxReadSize);
server->max_write = le32_to_cpu(rsp->MaxWriteSize);
- /* BB Do we need to validate the SecurityMode? */
server->sec_mode = le16_to_cpu(rsp->SecurityMode);
+ if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
+ cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
+ server->sec_mode);
server->capabilities = le32_to_cpu(rsp->Capabilities);
/* Internal types */
server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
@@ -621,6 +636,10 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
return 0;
#endif
+ /* In SMB3.11 preauth integrity supersedes validate negotiate */
+ if (tcon->ses->server->dialect == SMB311_PROT_ID)
+ return 0;
+
/*
* validation ioctl must be signed, so no point sending this if we
* can not sign it (ie are not known user). Even if signing is not
@@ -1148,6 +1167,14 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
sess_data->buf0_type = CIFS_NO_BUFFER;
sess_data->nls_cp = (struct nls_table *) nls_cp;
+#ifdef CONFIG_CIFS_SMB311
+ /*
+ * Initialize the session hash with the server one.
+ */
+ memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash,
+ SMB2_PREAUTH_HASH_SIZE);
+#endif
+
while (sess_data->func)
sess_data->func(sess_data);
@@ -1280,6 +1307,11 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
iov[1].iov_base = unc_path;
iov[1].iov_len = unc_path_len;
+ /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
+ if ((ses->server->dialect == SMB311_PROT_ID) &&
+ !encryption_required(tcon))
+ req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
+
rc = smb2_send_recv(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov);
cifs_small_buf_release(req);
rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
@@ -1441,7 +1473,7 @@ parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
unsigned int remaining;
char *name;
- data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
+ data_offset = (char *)rsp + server->vals->header_preamble_size + le32_to_cpu(rsp->CreateContextsOffset);
remaining = le32_to_cpu(rsp->CreateContextsLength);
cc = (struct create_context *)data_offset;
while (remaining >= sizeof(struct create_context)) {
@@ -1738,8 +1770,10 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
&name_len,
tcon->treeName, path);
- if (rc)
+ if (rc) {
+ cifs_small_buf_release(req);
return rc;
+ }
req->NameLength = cpu_to_le16(name_len * 2);
uni_path_len = copy_size;
path = copy_path;
@@ -1750,8 +1784,10 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
if (uni_path_len % 8 != 0) {
copy_size = roundup(uni_path_len, 8);
copy_path = kzalloc(copy_size, GFP_KERNEL);
- if (!copy_path)
+ if (!copy_path) {
+ cifs_small_buf_release(req);
return -ENOMEM;
+ }
memcpy((char *)copy_path, (const char *)path,
uni_path_len);
uni_path_len = copy_size;
@@ -3418,6 +3454,7 @@ static int
build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
int outbuf_len, u64 persistent_fid, u64 volatile_fid)
{
+ struct TCP_Server_Info *server = tcon->ses->server;
int rc;
struct smb2_query_info_req *req;
unsigned int total_len;
@@ -3440,7 +3477,7 @@ build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
req->InputBufferOffset =
cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
req->OutputBufferLength = cpu_to_le32(
- outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
+ outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - server->vals->header_preamble_size);
iov->iov_base = (char *)req;
iov->iov_len = total_len;
@@ -3457,6 +3494,7 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
int rc = 0;
int resp_buftype;
struct cifs_ses *ses = tcon->ses;
+ struct TCP_Server_Info *server = ses->server;
struct smb2_fs_full_size_info *info = NULL;
int flags = 0;
@@ -3477,7 +3515,7 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
}
rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
- info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
+ info = (struct smb2_fs_full_size_info *)(server->vals->header_preamble_size +
le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
@@ -3500,6 +3538,7 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
int rc = 0;
int resp_buftype, max_len, min_len;
struct cifs_ses *ses = tcon->ses;
+ struct TCP_Server_Info *server = ses->server;
unsigned int rsp_len, offset;
int flags = 0;
@@ -3540,15 +3579,15 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
goto qfsattr_exit;
if (level == FS_ATTRIBUTE_INFORMATION)
- memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
+ memcpy(&tcon->fsAttrInfo, server->vals->header_preamble_size + offset
+ (char *)&rsp->hdr, min_t(unsigned int,
rsp_len, max_len));
else if (level == FS_DEVICE_INFORMATION)
- memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
+ memcpy(&tcon->fsDevInfo, server->vals->header_preamble_size + offset
+ (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
else if (level == FS_SECTOR_SIZE_INFORMATION) {
struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
- (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
+ (server->vals->header_preamble_size + offset + (char *)&rsp->hdr);
tcon->ss_flags = le32_to_cpu(ss_info->Flags);
tcon->perf_sector_size =
le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
generated by cgit (git 2.34.1) at 2024-05-27 19:23:39 +0000