6.6-stable review patch. If anyone has any objections, please let me know.
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From: Henry Martin bsdhenrymartin@gmail.com
[ Upstream commit e12d3e1624a02706cdd3628bbf5668827214fa33 ]
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 bsdhenrymartin@gmail.com Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@oss.qualcomm.com Reviewed-by: "Daniel Thompson (RISCstar)" danielt@kernel.org Link: https://lore.kernel.org/r/20250401091647.22784-1-bsdhenrymartin@gmail.com Signed-off-by: Lee Jones lee@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/video/backlight/qcom-wled.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index 10129095a4c17..b19e5f73de8bb 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;