From: Al Viro <viro@zeniv.linux.org.uk>
To: Stefan Berger <stefanb@linux.ibm.com>
Cc: Amir Goldstein <amir73il@gmail.com>,
Miklos Szeredi <miklos@szeredi.hu>,
Christian Brauner <brauner@kernel.org>,
Mimi Zohar <zohar@linux.ibm.com>,
linux-unionfs@vger.kernel.org, linux-integrity@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 2/2] fs: remove the inode argument to ->d_real() method
Date: Fri, 2 Feb 2024 18:38:41 +0000 [thread overview]
Message-ID: <20240202183841.GF2087318@ZenIV> (raw)
In-Reply-To: <20240202182732.GE2087318@ZenIV>
On Fri, Feb 02, 2024 at 06:27:32PM +0000, Al Viro wrote:
> Think what happens if you fetch ->len in state prior to
> rename and ->name - after. memcpy() from one memory object
> with length that matches another, UAF right there.
s/UAF/fairly easy oops/ - you can end up fetching past the end of
page that hosts kmalloc'ed object, and there's no promise that anything
will be mapped there. I really need more coffee...
next prev parent reply other threads:[~2024-02-02 18:38 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-02 11:01 [PATCH 0/2] Decomplicate file_dentry() Amir Goldstein
2024-02-02 11:01 ` [PATCH 1/2] fs: make file_dentry() a simple accessor Amir Goldstein
2024-02-02 15:16 ` Stefan Berger
2024-02-02 11:01 ` [PATCH 2/2] fs: remove the inode argument to ->d_real() method Amir Goldstein
2024-02-02 12:19 ` Miklos Szeredi
2024-02-02 12:41 ` Amir Goldstein
2024-02-02 13:54 ` Christian Brauner
2024-02-06 15:28 ` Amir Goldstein
2024-02-02 15:17 ` Stefan Berger
2024-02-02 16:05 ` Al Viro
2024-02-02 16:16 ` Al Viro
2024-02-02 17:34 ` Stefan Berger
2024-02-02 18:27 ` Al Viro
2024-02-02 18:32 ` Stefan Berger
2024-02-02 18:50 ` Al Viro
2024-02-02 18:38 ` Al Viro [this message]
2024-02-06 16:02 ` [PATCH 0/2] Decomplicate file_dentry() Christian Brauner
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