5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Charles Han <hanchunchao@xxxxxxxxxx>
[ 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@xxxxxxxxxxxxxxx
Fixes: 7eb6ce2f2723 ("gpio: Convert to using %pOF instead of full_name")
Signed-off-by: Charles Han <hanchunchao@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20241114091822.78199-1-hanchunchao@xxxxxxxxxx
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpio/gpio-grgpio.c | 3 +++
1 file changed, 3 insertions(+)
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);
--
2.43.0
