linux-kernel - Re: BUG: 1bbbbe7 (x86: Exclude E820_RESERVED regions...) PANIC on boot

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]

Message-ID: <5085BA4A.30800@zytor.com>
Date:	Mon, 22 Oct 2012 14:27:38 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Jacob Shin <jacob.shin@....com>, Tom Rini <trini@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...nel.org" <stable@...nel.org>
Subject: Re: BUG: 1bbbbe7 (x86: Exclude E820_RESERVED regions...) PANIC on
 boot

On 10/22/2012 02:25 PM, Yinghai Lu wrote:
> On Mon, Oct 22, 2012 at 1:52 PM, H. Peter Anvin <hpa@...ux.intel.com> wrote:
>> On 10/22/2012 01:50 PM, Yinghai Lu wrote:
>>> ok, let's see if we can meet this extreme corner case except user
>>> specify not page aligned "memmap="
>>
>> If it is *only* memmap= there is a very simple solution: if the memmap
>> is RAM then we round up the starting address and round down the end
>> address; if the memmap is not RAM then we round up instead...
> 
> We never know that bios guys will not let bios produce crazy e820 map.
> 

Yeah, well, that just *will* happen... that's a given.

We can trim those ranges, though.  Who cares if we lose some RAM.

	-hpa


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/