[PATCH 3.18 085/151] char: tpm: Add missing error check for devm_kzalloc

[Greg Kroah-Hartman]

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

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

From: Kiran Padwal <kiran.padwal@xxxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxxx>
Reviewed-By: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Peter Huewe <peterhuewe@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/char/tpm/tpm_i2c_atmel.c   |    4 ++++
 drivers/char/tpm/tpm_i2c_nuvoton.c |    5 +++++
 2 files changed, 9 insertions(+)

--- a/drivers/char/tpm/tpm_i2c_atmel.c
+++ b/drivers/char/tpm/tpm_i2c_atmel.c
@@ -168,6 +168,10 @@ static int i2c_atmel_probe(struct i2c_cl
 
 	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);
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -538,6 +538,11 @@ static int i2c_nuvoton_probe(struct i2c_
 
 	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);
 


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