linux-kernel - [PATCH] ACPI: APEI: Check NULL argument in exported symbol

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Date:   Thu, 23 Sep 2021 12:56:10 -0700
From:   Vasyl Gomonovych <vgomonovych@...vell.com>
To:     <rafael@...nel.org>, <lenb@...nel.org>, <james.morse@....com>
CC:     Vasyl Gomonovych <vgomonovych@...vell.com>,
        Tony Luck <tony.luck@...el.com>,
        Borislav Petkov <bp@...en8.de>,
        Randy Dunlap <rdunlap@...radead.org>,
        Yazen Ghannam <yazen.ghannam@....com>,
        "Robert Richter" <rrichter@....com>,
        Tom Saeger <tom.saeger@...cle.com>,
        <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] ACPI: APEI: Check NULL argument in exported symbol

Exported symbol apei_hest_parse is external API
and should check pointer argument

Signed-off-by: Vasyl Gomonovych <vgomonovych@...vell.com>
---
 drivers/acpi/apei/hest.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
index 277f00b288d1..9f5c334c7c88 100644
--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -91,7 +91,7 @@ int apei_hest_parse(apei_hest_func_t func, void *data)
 	struct acpi_hest_header *hest_hdr;
 	int i, rc, len;
 
-	if (hest_disable || !hest_tab)
+	if (hest_disable || !hest_tab || !func)
 		return -EINVAL;
 
 	hest_hdr = (struct acpi_hest_header *)(hest_tab + 1);
-- 
2.17.1