linux-kernel - [PATCH v3] crypto: s5p-sss - Add error handling in s5p_aes

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Message-Id: <20211021013422.21396-1-tangbin@cmss.chinamobile.com>
Date:   Thu, 21 Oct 2021 09:34:22 +0800
From:   Tang Bin <tangbin@...s.chinamobile.com>
To:     krzysztof.kozlowski@...onical.com, vz@...ia.com,
        herbert@...dor.apana.org.au, davem@...emloft.net
Cc:     linux-crypto@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Tang Bin <tangbin@...s.chinamobile.com>, stable@...r.kernel.org
Subject: [PATCH v3] crypto: s5p-sss - Add error handling in s5p_aes_probe()

The function s5p_aes_probe() does not perform sufficient error
checking after executing platform_get_resource(), thus fix it.

Fixes: c2afad6c6105 ("crypto: s5p-sss - Add HASH support for Exynos")
Cc: <stable@...r.kernel.org>
Signed-off-by: Tang Bin <tangbin@...s.chinamobile.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
---
Changes from v2
 - add Cc: <stable@...r.kernel.org>

Changes from v1
 - add fixed title
---
 drivers/crypto/s5p-sss.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c
index 55aa3a711..7717e9e59 100644
--- a/drivers/crypto/s5p-sss.c
+++ b/drivers/crypto/s5p-sss.c
@@ -2171,6 +2171,8 @@ static int s5p_aes_probe(struct platform_device *pdev)
 
 	variant = find_s5p_sss_version(pdev);
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -EINVAL;
 
 	/*
 	 * Note: HASH and PRNG uses the same registers in secss, avoid
-- 
2.20.1.windows.1