From df209c43a0e8258e096fb722dfbdae4f0dd13fde Mon Sep 17 00:00:00 2001 From: Nicholas Mc Guire Date: Sat, 1 Dec 2018 12:57:18 +0100 Subject: [PATCH] gpio: pl061: handle failed allocations devm_kzalloc(), devm_kstrdup() and devm_kasprintf() all can fail internal allocation and return NULL. Using any of the assigned objects without checking is not safe. As this is early in the boot phase and these allocations really should not fail, any failure here is probably an indication of a more serious issue so it makes little sense to try and rollback the previous allocated resources or try to continue; but rather the probe function is simply exited with -ENOMEM. Signed-off-by: Nicholas Mc Guire Fixes: 684284b64aae ("ARM: integrator: add MMCI device to IM-PD1") Signed-off-by: Linus Walleij --- arch/arm/mach-integrator/impd1.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-integrator/impd1.c b/arch/arm/mach-integrator/impd1.c index a109f6482413..0f916c245a2e 100644 --- a/arch/arm/mach-integrator/impd1.c +++ b/arch/arm/mach-integrator/impd1.c @@ -393,7 +393,11 @@ static int __ref impd1_probe(struct lm_device *dev) sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup), GFP_KERNEL); chipname = devm_kstrdup(&dev->dev, devname, GFP_KERNEL); - mmciname = kasprintf(GFP_KERNEL, "lm%x:00700", dev->id); + mmciname = devm_kasprintf(&dev->dev, GFP_KERNEL, + "lm%x:00700", dev->id); + if (!lookup || !chipname || !mmciname) + return -ENOMEM; + lookup->dev_id = mmciname; /* * Offsets on GPIO block 1: -- 2.34.1