Patch "tpm: fix a kernel memory leak in tpm-sysfs.c" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

tpm: fix a kernel memory leak in tpm-sysfs.c

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
tpm-fix-a-kernel-memory-leak-in-tpm-sysfs.c.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Jarkko Sakkinen <[email protected]>
Date: Tue, 20 Jun 2017 11:38:02 +0200
Subject: tpm: fix a kernel memory leak in tpm-sysfs.c

From: Jarkko Sakkinen <[email protected]>

commit 13b47cfcfc60495cde216eef4c01040d76174cbe upstream.

While cleaning up sysfs callback that prints EK we discovered a kernel memory leak. This commit fixes the issue by zeroing the buffer used for TPM command/response.

The leak happen when we use either tpm_vtpm_proxy, tpm_ibmvtpm or xen-tpmfront.

---
 drivers/char/tpm/tpm-sysfs.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -35,9 +35,10 @@ static ssize_t pubek_show(struct device
 	ssize_t err;
 	int i, rc;
 	char *str = buf;
-
 	struct tpm_chip *chip = to_tpm_chip(dev);
 
+	memset(&tpm_cmd, 0, sizeof(tpm_cmd));
+
 	tpm_cmd.header.in = tpm_readpubek_header;
 	err = tpm_transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE, 0,
 			       "attempting to read the PUBEK");

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/tpm-fix-a-kernel-memory-leak-in-tpm-sysfs.c.patch