linux-kernel - [PATCH 3.13.y-ckt 028/143] char: tpm: Add missing error check for devm

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Message-Id: <1427831308-1854-29-git-send-email-kamal@canonical.com>
Date:	Tue, 31 Mar 2015 12:46:33 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Kiran Padwal <kiran.padwal@...rtplayin.com>,
	Peter Huewe <peterhuewe@....de>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13.y-ckt 028/143] char: tpm: Add missing error check for devm_kzalloc

3.13.11-ckt18 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kiran Padwal <kiran.padwal@...rtplayin.com>

commit bb95cd34ba4c9467114acc78eeddd53ab1c10085 upstream.

Currently these driver are missing a check on the return value of devm_kzalloc,
which would cause a NULL pointer dereference in a OOM situation.

This patch adds a missing check for tpm_i2c_atmel.c and tpm_i2c_nuvoton.c

Signed-off-by: Kiran Padwal <kiran.padwal@...rtplayin.com>
Reviewed-By: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Signed-off-by: Peter Huewe <peterhuewe@....de>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/char/tpm/tpm_i2c_atmel.c   | 4 ++++
 drivers/char/tpm/tpm_i2c_nuvoton.c | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/char/tpm/tpm_i2c_atmel.c b/drivers/char/tpm/tpm_i2c_atmel.c
index c3cd7fe..28a1501 100644
--- a/drivers/char/tpm/tpm_i2c_atmel.c
+++ b/drivers/char/tpm/tpm_i2c_atmel.c
@@ -208,6 +208,10 @@ static int i2c_atmel_probe(struct i2c_client *client,
 
 	chip->vendor.priv = devm_kzalloc(dev, sizeof(struct priv_data),
 					 GFP_KERNEL);
+	if (!chip->vendor.priv) {
+		rc = -ENOMEM;
+		goto out_err;
+	}
 
 	/* Default timeouts */
 	chip->vendor.timeout_a = msecs_to_jiffies(TPM_I2C_SHORT_TIMEOUT);
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
index 6276fea..58decb7 100644
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -579,6 +579,11 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
 
 	chip->vendor.priv = devm_kzalloc(dev, sizeof(struct priv_data),
 					 GFP_KERNEL);
+	if (!chip->vendor.priv) {
+		rc = -ENOMEM;
+		goto out_err;
+	}
+
 	init_waitqueue_head(&chip->vendor.read_queue);
 	init_waitqueue_head(&chip->vendor.int_queue);
 
-- 
1.9.1

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