Message-Id: <200401060412.i064CJtK004302@turing-police.cc.vt.edu>
To: Libor Vanek <libor@conet.cz>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.0-mm1 - kernel panic (VFS bug?) 
In-Reply-To: Your message of "Tue, 06 Jan 2004 04:52:26 +0100."
             <3FFA30FA.1040602@conet.cz> 
From: Valdis.Kletnieks@vt.edu
References: <3FFA30FA.1040602@conet.cz>
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On Tue, 06 Jan 2004 04:52:26 +0100, Libor Vanek <libor@conet.cz>  said:

>         tmp = getname(filename);
> 	printk (KERN_INFO "sys_open: %s\n",tmp);

> Unable to handle kernel paging request at virtual address fffffff2

Hmm.. a -14. ;)


You did know that getname can return an error, right?  Try this:

	tmp = getname(filename);
	if ((int) tmp < 0) {
		printk (KERN_INFO "sys_open: getname returned error %d\n",tmp);
	} else {
		printk (KERN_INFO "sys_open: %s\n",tmp);
	}

Poking around in fs/namei.c shows that -14 is 'EFAULT' - most likely
some bozo did "fd = open(pointer_to_nowhere,....);".  Notice the use
of IS_ERR(tmp) in sys_open() to guard against this....


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