linux-kernel - [PATCH] remoteproc: mediatek: Dereferencing a pointer that might be NULL

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Date:   Fri, 3 Mar 2023 18:27:51 +0800
From:   Jason-ch Chen <jason-ch.chen@...iatek.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-remoteproc@...r.kernel.org>,
        jason-ch chen <Jason-ch.Chen@...iatek.com>
Subject: [PATCH] remoteproc: mediatek: Dereferencing a pointer that might be NULL

From: jason-ch chen <Jason-ch.Chen@...iatek.com>

The res might be NULL when calling resource_size.

Signed-off-by: jason-ch chen <Jason-ch.Chen@...iatek.com>
---
 drivers/remoteproc/mtk_scp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index eacdf241f4ef..863d18f63f58 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -829,6 +829,9 @@ static int scp_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, scp);
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
+	if (!res)
+		return -ENODEV;
+
 	scp->sram_base = devm_ioremap_resource(dev, res);
 	if (IS_ERR((__force void *)scp->sram_base)) {
 		dev_err(dev, "Failed to parse and map sram memory\n");
-- 
2.37.3