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Subject[043/205] TPM: ReadPubEK output struct fix
2.6.34-stable review patch.  If anyone has any objections, please let us know.

From: Rajiv Andrade <>

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 <>
Signed-off-by: James Morris <>
Signed-off-by: Greg Kroah-Hartman <>

drivers/char/tpm/tpm.h | 1 +
1 file changed, 1 insertion(+)
--- 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];

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