linux-kernel - [PATCH] seqfile: fix uninitialized memory allocation in mounts

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Message-ID: <20070815085637.GA19293@mail.ustc.edu.cn>
Date:	Wed, 15 Aug 2007 16:56:37 +0800
From:	Fengguang Wu <wfg@...l.ustc.edu.cn>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Al Viro <viro@....linux.org.uk>
Subject: [PATCH] seqfile: fix uninitialized memory allocation in
	mounts_open()

proc_mounts.m.buf is not explicitly zeroed at allocation time, which
may later confuse the seqfile code and triggle an kfree(m->buf).

Signed-off-by: Fengguang Wu <wfg@...l.ustc.edu.cn>
---

--- linux.orig/fs/proc/base.c
+++ linux/fs/proc/base.c
@@ -380,7 +380,7 @@ static int mounts_open(struct inode *ino
 
 	if (ns) {
 		ret = -ENOMEM;
-		p = kmalloc(sizeof(struct proc_mounts), GFP_KERNEL);
+		p = kzalloc(sizeof(struct proc_mounts), GFP_KERNEL);
 		if (p) {
 			file->private_data = &p->m;
 			ret = seq_open(file, &mounts_op);

-
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