Merge tag '4.18-fixes-smb3' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:

 - one smb3 (ACL related) fix for stable

 - one SMB3 security enhancement (when mounting -t smb3 forbid less
   secure dialects)

 - some RDMA and compounding fixes

* tag '4.18-fixes-smb3' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: fix a buffer leak in smb2_query_symlink
  smb3: do not allow insecure cifs mounts when using smb3
  CIFS: Fix NULL ptr deref
  CIFS: fix encryption in SMB3.1.1
  CIFS: Pass page offset for encrypting
  CIFS: Pass page offset for calculating signature
  CIFS: SMBD: Support page offset in memory registration
  CIFS: SMBD: Support page offset in RDMA recv
  CIFS: SMBD: Support page offset in RDMA send
  CIFS: When sending data on socket, pass the correct page offset
  CIFS: Introduce helper function to get page offset and length in smb_rqst
  CIFS: Calculate the correct request length based on page offset and tail size
  cifs: For SMB2 security informaion query, check for minimum sized security descriptor instead of sizeof FileAllInformation class
  CIFS: Fix signing for SMB2/3

1 files changed, 18 insertions, 4 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index eb7b6573f322..d5aa7ae917bf 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -698,8 +698,8 @@ static int cifs_set_super(struct super_block *sb, void *data)
 }
 
 static struct dentry *
-cifs_do_mount(struct file_system_type *fs_type,
-	      int flags, const char *dev_name, void *data)
+cifs_smb3_do_mount(struct file_system_type *fs_type,
+	      int flags, const char *dev_name, void *data, bool is_smb3)
 {
 	int rc;
 	struct super_block *sb;
@@ -710,7 +710,7 @@ cifs_do_mount(struct file_system_type *fs_type,
 
 	cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
 
-	volume_info = cifs_get_volume_info((char *)data, dev_name);
+	volume_info = cifs_get_volume_info((char *)data, dev_name, is_smb3);
 	if (IS_ERR(volume_info))
 		return ERR_CAST(volume_info);
 
@@ -790,6 +790,20 @@ out_nls:
 	goto out;
 }
 
+static struct dentry *
+smb3_do_mount(struct file_system_type *fs_type,
+	      int flags, const char *dev_name, void *data)
+{
+	return cifs_smb3_do_mount(fs_type, flags, dev_name, data, true);
+}
+
+static struct dentry *
+cifs_do_mount(struct file_system_type *fs_type,
+	      int flags, const char *dev_name, void *data)
+{
+	return cifs_smb3_do_mount(fs_type, flags, dev_name, data, false);
+}
+
 static ssize_t
 cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
 {
@@ -925,7 +939,7 @@ MODULE_ALIAS_FS("cifs");
 static struct file_system_type smb3_fs_type = {
 	.owner = THIS_MODULE,
 	.name = "smb3",
-	.mount = cifs_do_mount,
+	.mount = smb3_do_mount,
 	.kill_sb = cifs_kill_sb,
 	/*  .fs_flags */
 };