From: Joseph Qi via Ocfs2-devel <ocfs2-devel@oss.oracle.com>
To: Gang He <ghe@suse.com>, Andrew Morton <akpm@linux-foundation.org>
Cc: ocfs2-devel@oss.oracle.com
Subject: [Ocfs2-devel] [PATCH] ocfs2: fix crash when initialize filecheck kobj fails
Date: Thu, 10 Mar 2022 16:19:30 +0800 [thread overview]
Message-ID: <20220310081930.86305-1-joseph.qi@linux.alibaba.com> (raw)
Once s_root is set, genric_shutdown_super() will be called if
fill_super() fails. That means, we will call ocfs2_dismount_volume()
twice in such case, which can lead to kernel crash.
Fix this issue by initializing filecheck kobj before setting s_root.
Fixes: 5f483c4abb50 ("ocfs2: add kobject for online file check")
Cc: <stable@vger.kernel.org>
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
---
fs/ocfs2/super.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 2772dec9dcea..8bde30fa5387 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1105,17 +1105,6 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
goto read_super_error;
}
- root = d_make_root(inode);
- if (!root) {
- status = -ENOMEM;
- mlog_errno(status);
- goto read_super_error;
- }
-
- sb->s_root = root;
-
- ocfs2_complete_mount_recovery(osb);
-
osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
&ocfs2_kset->kobj);
if (!osb->osb_dev_kset) {
@@ -1133,6 +1122,17 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
goto read_super_error;
}
+ root = d_make_root(inode);
+ if (!root) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto read_super_error;
+ }
+
+ sb->s_root = root;
+
+ ocfs2_complete_mount_recovery(osb);
+
if (ocfs2_mount_local(osb))
snprintf(nodestr, sizeof(nodestr), "local");
else
--
2.19.1.6.gb485710b
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