linux-kernel - [PATCH] wifi: brcmfmac: Add null pointer check to brcmf_acpi

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Message-Id: <20251015071607.96415-1-liqiang01@kylinos.cn>
Date: Wed, 15 Oct 2025 15:16:07 +0800
From: Li Qiang <liqiang01@...inos.cn>
To: arend.vanspriel@...adcom.com,
	linux-wireless@...r.kernel.org,
	brcm80211@...ts.linux.dev,
	brcm80211-dev-list.pdl@...adcom.com
Cc: linux-kernel@...r.kernel.org,
	Li Qiang <liqiang01@...inos.cn>
Subject: [PATCH] wifi: brcmfmac: Add null pointer check to brcmf_acpi_probe

devm_kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure.

Fixes: 0f485805d008a ("wifi: brcmfmac: acpi: Add support for fetching Apple ACPI properties")
Signed-off-by: Li Qiang <liqiang01@...inos.cn>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/acpi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/acpi.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/acpi.c
index c4a54861bfb4..f8f6433bdf69 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/acpi.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/acpi.c
@@ -25,6 +25,8 @@ void brcmf_acpi_probe(struct device *dev, enum brcmf_bus_type bus_type,
 		settings->board_type = devm_kasprintf(dev, GFP_KERNEL,
 						      "apple,%s",
 						      o->string.pointer);
+		if (!settings->board_type)
+			return;
 	} else {
 		brcmf_dbg(INFO, "No ACPI module-instance\n");
 		return;
-- 
2.25.1