From: Charles Han <hanchunchao@inspur.com> stable inclusion from stable-v6.6.66 commit 8d2ca6ac3711a4f4015d26b7cc84f325ac608edb category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBEANT CVE: CVE-2024-56634 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ 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 <hanchunchao@inspur.com> Link: https://lore.kernel.org/r/20241114091822.78199-1-hanchunchao@inspur.com Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org> Conflicts: drivers/gpio/gpio-grgpio.c [The conflicts were due to some minor issues.] Signed-off-by: Pu Lehui <pulehui@huawei.com> --- 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 0163c95f6dd7..b8b9f55e1bc0 100644 --- a/drivers/gpio/gpio-grgpio.c +++ b/drivers/gpio/gpio-grgpio.c @@ -361,6 +361,9 @@ static int grgpio_probe(struct platform_device *ofdev) gc->owner = THIS_MODULE; gc->to_irq = grgpio_to_irq; gc->label = devm_kasprintf(&ofdev->dev, GFP_KERNEL, "%pOF", np); + if (!gc->label) + return -ENOMEM; + gc->base = -1; err = of_property_read_u32(np, "nbits", &prop); -- 2.34.1