From: Henry Martin Date: Tue, 1 Apr 2025 09:16:47 +0000 (+0800) Subject: backlight: pm8941: Add NULL check in wled_configure() X-Git-Tag: v6.16-rc1~61^2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e12d3e1624a02706cdd3628bbf5668827214fa33;p=thirdparty%2Flinux.git backlight: pm8941: Add NULL check in wled_configure() devm_kasprintf() returns NULL when memory allocation fails. Currently, wled_configure() does not check for this case, which results in a NULL pointer dereference. Add NULL check after devm_kasprintf() to prevent this issue. Fixes: f86b77583d88 ("backlight: pm8941: Convert to using %pOFn instead of device_node.name") Signed-off-by: Henry Martin Reviewed-by: Dmitry Baryshkov Reviewed-by: "Daniel Thompson (RISCstar)" Link: https://lore.kernel.org/r/20250401091647.22784-1-bsdhenrymartin@gmail.com Signed-off-by: Lee Jones --- diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index 9afe701b2a1b6..a63bb42c8f8b0 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -1406,9 +1406,11 @@ static int wled_configure(struct wled *wled) wled->ctrl_addr = be32_to_cpu(*prop_addr); rc = of_property_read_string(dev->of_node, "label", &wled->name); - if (rc) + if (rc) { wled->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node); - + if (!wled->name) + return -ENOMEM; + } switch (wled->version) { case 3: u32_opts = wled3_opts;