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 issue was detected with the help of Coccinelle.
Fixes: 684284b64aae ("ARM: integrator: add MMCI device to IM-PD1")
Cc: sta...@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com>
---
arch/arm/mach-integrator/impd1.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm/mach-integrator/impd1.c b/arch/arm/mach-integrator/impd1.c
index a109f6482413..eb0149561be2 100644
--- a/arch/arm/mach-integrator/impd1.c
+++ b/arch/arm/mach-integrator/impd1.c
@@ -392,6 +392,9 @@ static int __ref impd1_probe(struct lm_device *dev)
lookup = devm_kzalloc(&dev->dev,
sizeof(*lookup) + 3 *
sizeof(struct gpiod_lookup),
GFP_KERNEL);
+ if (!lookup)
+ return -ENOMEM;
+
chipname = devm_kstrdup(&dev->dev, devname, GFP_KERNEL);
mmciname = kasprintf(GFP_KERNEL, "lm%x:00700", dev->id);
lookup->dev_id = mmciname;
--
2.20.1
