tree 70711c264122f4a563d9b27360f5fa5411dd28c2
parent ae6088216ce4b99b3a4aaaccd2eb2dd40d473d42
author Tadeusz Struk <tadeusz.struk@intel.com> 1578434688 -0800
committer Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> 1578499869 +0200

tpm: Handle negative priv->response_len in tpm_common_read()

The priv->response_length can hold the size of an response or an negative
error code, and the tpm_common_read() needs to handle both cases correctly.
Changed the type of response_length to signed and accounted for negative
value in tpm_common_read().

Cc: stable@vger.kernel.org
Fixes: d23d12484307 ("tpm: fix invalid locking in NONBLOCKING mode")
Reported-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>