From: Al Viro <viro@ftp.linux.org.uk>
To: liyu <liyu@ccoss.com.cn>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [WTF?] sys_tas() on m32r
Date: Fri, 23 Dec 2005 07:54:52 +0000 [thread overview]
Message-ID: <20051223075452.GS27946@ftp.linux.org.uk> (raw)
In-Reply-To: <43ABAC48.20004@ccoss.com.cn>
On Fri, Dec 23, 2005 at 03:50:32PM +0800, liyu wrote:
> >in arch/m32r/kernel/sys_m32r.c. Trivial oops *AND* ability to trigger
> >IO with interrupts disabled.
> The memory that parameter addr pointer is in user-space.
> To access these memory, you should use function like copy_from_user().
... which is deadly with interrupts disabled/under a spinlock. Exactly.
next prev parent reply other threads:[~2005-12-23 7:54 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-23 6:15 [WTF?] sys_tas() on m32r Al Viro
2005-12-23 7:50 ` liyu
2005-12-23 7:54 ` Al Viro [this message]
2005-12-23 13:55 ` Andrew Morton
2005-12-23 19:10 ` Lee Revell
2005-12-27 6:36 ` Hirokazu Takata
2005-12-27 9:34 ` Jesper Juhl
2005-12-27 5:27 ` Hirokazu Takata
2005-12-27 13:22 ` Andrew Morton
2005-12-28 0:36 ` Hirokazu Takata
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