linux-kernel - Re: [PATCH v4 1/5] reiserfs: Add missing calls to reiserfs_security

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 16 Nov 2022 16:03:45 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Roberto Sassu <roberto.sassu@...weicloud.com>,
        dmitry.kasatkin@...il.com, paul@...l-moore.com, jmorris@...ei.org,
        serge@...lyn.com, stephen.smalley.work@...il.com,
        eparis@...isplace.org, casey@...aufler-ca.com
Cc:     linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, selinux@...r.kernel.org,
        reiserfs-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
        keescook@...omium.org, nicolas.bouchinet@...p-os.org,
        Roberto Sassu <roberto.sassu@...wei.com>,
        stable@...r.kernel.org, Jeff Mahoney <jeffm@...e.com>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Subject: Re: [PATCH v4 1/5] reiserfs: Add missing calls to
 reiserfs_security_free()

On Thu, 2022-11-10 at 10:46 +0100, Roberto Sassu wrote:
> From: Roberto Sassu <roberto.sassu@...wei.com>
> 
> Commit 57fe60df6241 ("reiserfs: add atomic addition of selinux attributes
> during inode creation") defined reiserfs_security_free() to free the name
> and value of a security xattr allocated by the active LSM through
> security_old_inode_init_security(). However, this function is not called
> in the reiserfs code.
> 
> Thus, add a call to reiserfs_security_free() whenever
> reiserfs_security_init() is called, and initialize value to NULL, to avoid
> to call kfree() on an uninitialized pointer.
> 
> Finally, remove the kfree() for the xattr name, as it is not allocated
> anymore.
> 
> Fixes: 57fe60df6241 ("reiserfs: add atomic addition of selinux attributes during inode creation")
> Cc: stable@...r.kernel.org
> Cc: Jeff Mahoney <jeffm@...e.com>
> Cc: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
> Reported-by: Mimi Zohar <zohar@...ux.ibm.com>
> Reported-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
> Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>

Reviewed-by: Mimi Zohar <zohar@...ux.ibm.com>