linux-kernel - Re: VFS: Busy inodes after unmount (use-after-free)

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Message-ID: <f1601b51-4c9a-4a99-ac04-9403f2939b37@I-love.SAKURA.ne.jp>
Date: Sat, 23 Nov 2024 20:03:29 +0900
From: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To: syzbot+0af00f6a2cba2058b5db@...kaller.appspotmail.com,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: VFS: Busy inodes after unmount (use-after-free)

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git v6.12

 fs/ocfs2/namei.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 59c92353151a..5550f8afa438 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -200,8 +200,10 @@ static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
 	mode = mode_strip_sgid(&nop_mnt_idmap, dir, mode);
 	inode_init_owner(&nop_mnt_idmap, inode, dir, mode);
 	status = dquot_initialize(inode);
-	if (status)
+	if (status) {
+		iput(inode);
 		return ERR_PTR(status);
+	}
 
 	return inode;
 }
-- 
2.47.0