Messages in this thread Patch in this message | | | Date | Tue, 22 Jan 2019 10:56:36 -0600 | From | "Gustavo A. R. Silva" <> | Subject | [PATCH 1/2] mfd: sm501: Fix potential NULL pointer dereference |
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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 <gustavo@embeddedor.com> --- drivers/mfd/sm501.c | 3 +++ 1 file changed, 3 insertions(+)
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"; -- 2.20.1
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