From ae7b8eda27b33b1f688dfdebe4d46f690a8f9162 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Tue, 22 Jan 2019 10:56:36 -0600 Subject: mfd: sm501: Fix potential NULL pointer dereference There is a potential NULL pointer dereference in case devm_kzalloc() fails and returns NULL. Fix this by adding a NULL check on *lookup* This bug was detected with the help of Coccinelle. Fixes: b2e63555592f ("i2c: gpio: Convert to use descriptors") Cc: stable@vger.kernel.org Signed-off-by: Gustavo A. R. Silva Signed-off-by: Lee Jones --- drivers/mfd/sm501.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/mfd') diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c index a530972c5a7e..e0173bf4b0dc 100644 --- a/drivers/mfd/sm501.c +++ b/drivers/mfd/sm501.c @@ -1145,6 +1145,9 @@ static int sm501_register_gpio_i2c_instance(struct sm501_devdata *sm, lookup = devm_kzalloc(&pdev->dev, sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup), GFP_KERNEL); + if (!lookup) + return -ENOMEM; + lookup->dev_id = "i2c-gpio"; if (iic->pin_sda < 32) lookup->table[0].chip_label = "SM501-LOW"; -- cgit