linux-kernel - Re: [PATCH v3 17/21] vmcore: check NT_VMCORE_PAD as a mark indicating the end of ELF note buffer

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <87r4j8p8og.fsf@xmission.com>
Date:	Thu, 21 Mar 2013 17:41:51 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
Cc:	vgoyal@...hat.com, cpw@....com, kumagai-atsushi@....nes.nec.co.jp,
	lisa.mitchell@...com, heiko.carstens@...ibm.com,
	akpm@...ux-foundation.org, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, zhangyanfei@...fujitsu.com
Subject: Re: [PATCH v3 17/21] vmcore: check NT_VMCORE_PAD as a mark indicating the end of ELF note buffer

HATAYAMA Daisuke <d.hatayama@...fujitsu.com> writes:

> From: Vivek Goyal <vgoyal@...hat.com>
> Subject: Re: [PATCH v3 17/21] vmcore: check NT_VMCORE_PAD as a mark indicating the end of ELF note buffer
> Date: Thu, 21 Mar 2013 10:36:56 -0400
>
>> And in our case we don't know the size of ELF note. Kernel is not
>> exporting the size. So kexec-tools is putting an upper limit of 1024
>> and putting that value in p_memsz and p_filesz fields.
>> 
>> Given the fact that we are reserving elf notes at boot. That means
>> we know the size of ELF notes. It should make sense to export it
>> to user space and let kexec-tools put right values.
>> 
>
> Anyway, I think of this issue as beyond the scope of what I'm working
> here...

Agreed.  It is independent and can be fixed independently.

Eric
--
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/