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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Tiezhu Yang <yangtiezhu@loongson.cn>,
        Paul Burton <paulburton@kernel.org>,
        Ralf Baechle <ralf@linux-mips.org>,
        Huacai Chen <chenhc@lemote.com>,
        Jiaxun Yang <jiaxun.yang@flygoat.com>,
        linux-mips@vger.kernel.org, Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.4 026/113] MIPS: Loongson: Fix potential NULL dereference in loongson3_platform_init()
Date:   Thu, 27 Feb 2020 14:35:42 +0100
Message-Id: <20200227132215.859062761@linuxfoundation.org>
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From: Tiezhu Yang <yangtiezhu@loongson.cn>

[ Upstream commit 72d052e28d1d2363f9107be63ef3a3afdea6143c ]

If kzalloc fails, it should return -ENOMEM, otherwise may trigger a NULL
pointer dereference.

Fixes: 3adeb2566b9b ("MIPS: Loongson: Improve LEFI firmware interface")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/mips/loongson64/loongson-3/platform.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/mips/loongson64/loongson-3/platform.c b/arch/mips/loongson64/loongson-3/platform.c
index 25a97cc0ee336..0db4cc3196ebd 100644
--- a/arch/mips/loongson64/loongson-3/platform.c
+++ b/arch/mips/loongson64/loongson-3/platform.c
@@ -31,6 +31,9 @@ static int __init loongson3_platform_init(void)
 			continue;
 
 		pdev = kzalloc(sizeof(struct platform_device), GFP_KERNEL);
+		if (!pdev)
+			return -ENOMEM;
+
 		pdev->name = loongson_sysconf.sensors[i].name;
 		pdev->id = loongson_sysconf.sensors[i].id;
 		pdev->dev.platform_data = &loongson_sysconf.sensors[i];
-- 
2.20.1