linux-kernel - [PATCH] Free the memory allocated by memdup

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Message-ID: <20090708101734.27241.88930.stgit@pc1117.cambridge.arm.com>
Date:	Wed, 08 Jul 2009 11:17:34 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Parag Warudkar <parag.warudkar@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] Free the memory allocated by memdup_user() in fs/sysfs/bin.c

Commit 1c8542c7bb replaced kmalloc() with memdup_user() in the write()
function but also dropped the kfree(temp). The memdup_user() function
allocates memory which is never freed.

Signed-off-by: Catalin Marinas <catalin.marinas@....com>
Cc: Parag Warudkar <parag.warudkar@...il.com>
---
 fs/sysfs/bin.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c
index 9345806..2524714 100644
--- a/fs/sysfs/bin.c
+++ b/fs/sysfs/bin.c
@@ -171,6 +171,7 @@ static ssize_t write(struct file *file, const char __user *userbuf,
 	if (count > 0)
 		*off = offs + count;
 
+	kfree(temp);
 	return count;
 }
 

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