Merge tag '5.18-rc2-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Merge tag '5.18-rc2-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:

 - two fixes related to unmount

 - symlink overflow fix

 - minor netfs fix

 - improved tracing for crediting (flow control)

* tag '5.18-rc2-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: verify that tcon is valid before dereference in cifs_kill_sb
  cifs: potential buffer overflow in handling symlinks
  cifs: Split the smb3_add_credits tracepoint
  cifs: release cached dentries only if mount is complete
  cifs: Check the IOCB_DIRECT flag, not O_DIRECT