From: Charles Han Date: Thu, 14 Nov 2024 09:18:22 +0000 (+0800) Subject: gpio: grgpio: Add NULL check in grgpio_probe X-Git-Tag: v5.15.174~139 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad4dfa7ea7f5f7e9a3c78627cfc749bc7005ca7a;p=thirdparty%2Fkernel%2Fstable.git gpio: grgpio: Add NULL check in grgpio_probe [ Upstream commit 050b23d081da0f29474de043e9538c1f7a351b3b ] devm_kasprintf() can return a NULL pointer on failure,but this returned value in grgpio_probe is not checked. Add NULL check in grgpio_probe, to handle kernel NULL pointer dereference error. Cc: stable@vger.kernel.org Fixes: 7eb6ce2f2723 ("gpio: Convert to using %pOF instead of full_name") Signed-off-by: Charles Han Link: https://lore.kernel.org/r/20241114091822.78199-1-hanchunchao@inspur.com Signed-off-by: Bartosz Golaszewski Signed-off-by: Sasha Levin --- diff --git a/drivers/gpio/gpio-grgpio.c b/drivers/gpio/gpio-grgpio.c index bf5ecf23cbceb..0d2441b7c6d02 100644 --- a/drivers/gpio/gpio-grgpio.c +++ b/drivers/gpio/gpio-grgpio.c @@ -363,6 +363,9 @@ static int grgpio_probe(struct platform_device *ofdev) gc->owner = THIS_MODULE; gc->to_irq = grgpio_to_irq; gc->label = devm_kasprintf(dev, GFP_KERNEL, "%pOF", np); + if (!gc->label) + return -ENOMEM; + gc->base = -1; err = of_property_read_u32(np, "nbits", &prop);