TPM: Zero buffer whole after copying to userspace
authorTim Gardner <tim.gardner@canonical.com>
Tue, 6 Dec 2011 18:29:20 +0000 (11:29 -0700)
committerRajiv Andrade <srajiv@linux.vnet.ibm.com>
Tue, 14 Feb 2012 18:43:38 +0000 (16:43 -0200)
commit3ab1aff89477dafb1aaeafe8c8669114a02b7226
treea8445d0ca44505db9f59620c92b9fe842f9304f0
parent968de8e24d08fcc425e112ca465d4688b89b777b
TPM: Zero buffer whole after copying to userspace

Commit 3321c07ae5068568cd61ac9f4ba749006a7185c9 correctly clears the TPM
buffer if the user specified read length is >= the TPM buffer length. However,
if the user specified read length is < the TPM buffer length, then part of the
TPM buffer is left uncleared.

Reported-by: Seth Forshee <seth.forshee@canonical.com>
Cc: Debora Velarde <debora@linux.vnet.ibm.com>
Cc: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Cc: Marcel Selhorst <m.selhorst@sirrix.com>
Cc: tpmdd-devel@lists.sourceforge.net
Cc: stable@vger.kernel.org
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
drivers/char/tpm/tpm.c