TPM: ReadPubEK output struct fix

commit 02a077c52ef7631275a79862ffd9f3dbe9d38bc2 upstream.

This patch adds a missing element of the ReadPubEK command output,
that prevents future overflow of this buffer when copying the
TPM output result into it.

Prevents a kernel panic in case the user tries to read the
pubek from sysfs.

Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 8e00b4ddd0830699bca8bab65c3e855657b21978..792868d24f2a0f2ad6bc21a4967ace01a2f84d92 100644 (file)
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -224,6 +224,7 @@ struct      tpm_readpubek_params_out {
        u8      algorithm[4];
        u8      encscheme[2];
        u8      sigscheme[2];
+       __be32  paramsize;
        u8      parameters[12]; /*assuming RSA*/
        __be32  keysize;
        u8      modulus[256];