linux-kernel - [PATCH] asus-laptop: fix a memory leak in asus_laptop_get

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Date:	Tue, 29 Jun 2010 11:09:47 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	Corentin Chary <corentincj@...aif.net>,
	Matthew Garrett <mjg@...hat.com>,
	Len Brown <len.brown@...el.com>,
	Alan Jenkins <alan-jenkins@...fmail.co.uk>,
	acpi4asus-user@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org
Subject: [PATCH] asus-laptop: fix a memory leak in asus_laptop_get_info
	error path

The callers of write_acpi_int_ret() pass ACPI_ALLOCATE_BUFFER,
the caller must kfree the returned buffer if AE_OK is returned.

This patch adds a missing kfree(buffer.pointer) before return -ENOMEM
if kstrdup fail.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/platform/x86/asus-laptop.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c
index 71db2ef..3d76c6a 100644
--- a/drivers/platform/x86/asus-laptop.c
+++ b/drivers/platform/x86/asus-laptop.c
@@ -1397,8 +1397,10 @@ static int asus_laptop_get_info(struct asus_laptop *asus)
 		}
 	}
 	asus->name = kstrdup(string, GFP_KERNEL);
-	if (!asus->name)
+	if (!asus->name) {
+		kfree(buffer.pointer);
 		return -ENOMEM;
+	}
 
 	if (*string)
 		pr_notice("  %s model detected\n", string);
-- 
1.5.4.3



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