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Message-ID: <20110828092520.GA8537@sun>
Date: Sun, 28 Aug 2011 13:25:21 +0400
From: Cyrill Gorcunov <gorcunov@...il.com>
To: Vasiliy Kulikov <segoon@...nwall.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
kernel-hardening@...ts.openwall.com,
Al Viro <viro@...iv.linux.org.uk>,
David Rientjes <rientjes@...gle.com>,
Stephen Wilson <wilsons@...rt.ca>,
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
linux-kernel@...r.kernel.org, security@...nel.org
Subject: Re: [PATCH v2] proc: fix races against execve() of /proc/PID/fd**
On Sat, Aug 27, 2011 at 11:01:47PM +0400, Vasiliy Kulikov wrote:
...
>
> +static int proc_pid_fd_link_getattr(struct vfsmount *mnt, struct dentry *dentry,
> + struct kstat *stat)
> +{
> + struct inode *inode = dentry->d_inode;
> + struct task_struct *task = get_proc_task(inode);
> + int rc;
> +
Are we sure if the task will be always valid here?
if (!task)
return -ENOENT;
Cyrill
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