From: Jeff Dike <jdike@addtoit.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: user-mode-linux-devel@lists.sourceforge.net
Subject: [uml-devel] Re: [patch] uml fixes, 2.6.1-mm5-A2
Date: Fri, 23 Jan 2004 08:56:47 -0500 [thread overview]
Message-ID: <20040123135647.GA6768@ccure.user-mode-linux.org> (raw)
In-Reply-To: <20040123093541.GA21763@elte.hu>
On Fri, Jan 23, 2004 at 10:35:41AM +0100, Ingo Molnar wrote:
> hm, there's this code in arch/um/sys-i386/bugs.c:arch_handle_signal():
>
> ip = UPT_IP(regs);
> if((*((char *) ip) != 0x0f) || ((*((char *) (ip + 1)) & 0xf0) != 0x40))
> return(0);
>
> we are running in the UML kernel context here. Is the dereferencing of
> IP safe?
No, it's not. There needs to be a copy_from_user in there.
Jeff
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next prev parent reply other threads:[~2004-01-23 13:34 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-20 19:17 [uml-devel] [patch] uml-fixes-2.6.1-mm5-A1 Ingo Molnar
2004-01-20 19:43 ` [uml-devel] [patch] uml-fixes2-2.6.1-mm5-A0 Ingo Molnar
2004-01-20 20:01 ` [uml-devel] [patch] uml-fixes2-2.6.1-mm5-A1 Ingo Molnar
2004-01-22 16:21 ` [uml-devel] [patch] uml fixes, 2.6.1-mm5-A2 Ingo Molnar
2004-01-22 18:42 ` Jeff Dike
2004-01-23 6:18 ` nsb034
2004-01-28 4:39 ` Jeff Dike
2004-01-23 9:35 ` [uml-devel] " Ingo Molnar
2004-01-23 13:56 ` Jeff Dike [this message]
2004-01-23 13:51 ` Ingo Molnar
2004-01-23 16:09 ` Jeff Dike
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