linux-kernel - [PATCH] x86/microcode/intel: Fix allocation size of struct ucode

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Message-ID: <7a730dc9-ac17-35c4-fe76-dfc94e5ecd95@ce.jp.nec.com>
Date:   Thu, 5 Jan 2017 01:03:51 +0000
From:   Junichi Nomura <j-nomura@...jp.nec.com>
To:     "bp@...en8.de" <bp@...en8.de>, "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "hpa@...or.com" <hpa@...or.com>
Subject: [PATCH] x86/microcode/intel: Fix allocation size of struct
 ucode_patch

We allocate struct ucode_patch here.

"size" is a size of microcode data and used for kmemdup() later
in this function.

Signed-off-by: Jun'ichi Nomura <j-nomura@...jp.nec.com>
Fixes: 06b8534cb728 ("x86/microcode: Rework microcode loading")

diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index aee3cb5..042f329 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -150,7 +150,7 @@ static struct ucode_patch *__alloc_microcode_buf(void *data, unsigned int size)
 {
 	struct ucode_patch *p;
 
-	p = kzalloc(size, GFP_KERNEL);
+	p = kzalloc(sizeof(struct ucode_patch), GFP_KERNEL);
 	if (!p)
 		return ERR_PTR(-ENOMEM);
 
-- 
Jun'ichi Nomura, NEC Corporation / NEC Solution Innovators, Ltd.