[PATCH 0/4] TPM fixes

[Lino Sanfilippo]

This patch series fixes some flaws in the TPM code. Most importantly a
reference count issue (patch 2) and a possible NULL pointer access
(patch 3). Patch 1 fixes the error path in tpmm_chip_alloc() and is in
preparation to patch 2 which extends this function. Patch 4 introduces
a new function tpm_chip_free() which is used as a counterpart to
tpm_chip_alloc(). The main reason for this function is to hide the
internals of tpm_chip cleanup by means of multiple reference count
handling.

Lino Sanfilippo (4):
  tpm: in case of error properly cleanup in tpmm_chip_alloc
  tpm: fix reference counting for struct tpm_chip
  tpm: in tpm2_del_space check if ops pointer is still valid
  tpm: Provide a function tpm_chip_free() to free tpm chips

 drivers/char/tpm/tpm-chip.c       | 33 ++++++++++++++++++++++++++++++---
 drivers/char/tpm/tpm.h            |  1 +
 drivers/char/tpm/tpm2-space.c     |  2 +-
 drivers/char/tpm/tpm_ftpm_tee.c   |  4 ++--
 drivers/char/tpm/tpm_vtpm_proxy.c |  2 +-
 5 files changed, 35 insertions(+), 7 deletions(-)

-- 
2.7.4