releases/4.7.7/tpm-fix-byte-order-for-the-value-read-by-tpm2_get_tpm_pt.patch

   1 From 1b0612b04090e416828c0dd5ed197b0913d834a0 Mon Sep 17 00:00:00 2001
   2 From: "apronin@chromium.org" <apronin@chromium.org>
   3 Date: Thu, 14 Jul 2016 18:07:18 -0700
   4 Subject: tpm: fix byte-order for the value read by tpm2_get_tpm_pt
   5
   6 From: apronin@chromium.org <apronin@chromium.org>
   7
   8 commit 1b0612b04090e416828c0dd5ed197b0913d834a0 upstream.
   9
  10 The result must be converted from BE byte order, which is used by the
  11 TPM2 protocol. This has not popped out because tpm2_get_tpm_pt() has
  12 been only used for probing.
  13
  14 Fixes: 7a1d7e6dd76a ("tpm: TPM 2.0 baseline support")
  15 Change-Id: I7d71cd379b1a3b7659d20a1b6008216762596590
  16 Signed-off-by: Andrey Pronin <apronin@chromium.org>
  17 Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
  18 Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
  19 Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
  20 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  21
  22 ---
  23  drivers/char/tpm/tpm2-cmd.c |    2 +-
  24  1 file changed, 1 insertion(+), 1 deletion(-)
  25
  26 --- a/drivers/char/tpm/tpm2-cmd.c
  27 +++ b/drivers/char/tpm/tpm2-cmd.c
  28 @@ -703,7 +703,7 @@ ssize_t tpm2_get_tpm_pt(struct tpm_chip
  29
  30         rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), desc);
  31         if (!rc)
  32 -               *value = cmd.params.get_tpm_pt_out.value;
  33 +               *value = be32_to_cpu(cmd.params.get_tpm_pt_out.value);
  34
  35         return rc;
  36  }