linux-ext4 - [patch 1/4] ext4: error proc entry creation when the fs/ext4 is not correctly created

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Message-Id: <200807130626.m6D6QKa3007907@imap1.linux-foundation.org>
Date:	Sat, 12 Jul 2008 23:26:19 -0700
From:	akpm@...ux-foundation.org
To:	tytso@....edu
Cc:	cmm@...ibm.com, linux-ext4@...r.kernel.org,
	akpm@...ux-foundation.org, shen@...fujitsu.com
Subject: [patch 1/4] ext4: error proc entry creation when the fs/ext4 is not correctly created

From: Shen Feng <shen@...fujitsu.com>

When the directory fs/ext4 is not correctly created under proc, the entry
under this directory should not be created.

Signed-off-by: Shen Feng <shen@...fujitsu.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

 fs/ext4/mballoc.c |    4 ++++
 1 file changed, 4 insertions(+)

diff -puN fs/ext4/mballoc.c~ext4-error-proc-entry-creation-when-the-fs-ext4-is-not-correctly-created fs/ext4/mballoc.c
--- a/fs/ext4/mballoc.c~ext4-error-proc-entry-creation-when-the-fs-ext4-is-not-correctly-created
+++ a/fs/ext4/mballoc.c
@@ -2785,6 +2785,10 @@ static int ext4_mb_init_per_dev_proc(str
 	struct proc_dir_entry *proc;
 	char devname[64];
 
+	if (proc_root_ext4 == NULL) {
+		sbi->s_mb_proc = NULL;
+		return -EINVAL;
+	}
 	bdevname(sb->s_bdev, devname);
 	sbi->s_mb_proc = proc_mkdir(devname, proc_root_ext4);
 
_
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