char: tpm: Add missing error check for devm_kzalloc

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

Cc: stable@vger.kernel.org
Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com>
Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>

2 files changed, 9 insertions, 0 deletions

diff --git a/drivers/char/tpm/tpm_i2c_atmel.c b/drivers/char/tpm/tpm_i2c_atmel.c
index 77272925dee6..503a85ae176c 100644
--- 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_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 7b158efd49f7..23c7b137a7fd 100644
--- 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_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);