linux-kernel - Re: [PATCH v10 2/7] x86/boot: Copy kstrtoull() to compressed period

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] [day] [month] [year] [list]

Message-ID: <20181107012802.GC2683@localhost.localdomain>
Date:   Wed, 7 Nov 2018 09:28:02 +0800
From:   Chao Fan <fanc.fnst@...fujitsu.com>
To:     Borislav Petkov <bp@...en8.de>
CC:     <linux-kernel@...r.kernel.org>, <x86@...nel.org>,
        <linux-efi@...r.kernel.org>, <linux-acpi@...r.kernel.org>,
        <tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>,
        <keescook@...omium.org>, <bhe@...hat.com>, <msys.mizuma@...il.com>,
        <indou.takao@...fujitsu.com>, <caoj.fnst@...fujitsu.com>
Subject: Re: [PATCH v10 2/7] x86/boot: Copy kstrtoull() to compressed period

On Tue, Nov 06, 2018 at 08:13:03PM +0100, Borislav Petkov wrote:
>On Mon, Oct 22, 2018 at 05:37:15PM +0800, Chao Fan wrote:
>> kstrtoull() lives in 'uncompressed' period, used to
>> convert a string to an unsigned long long.
>> Copy to 'compressed' so that we can use it to
>> convert the memory address from sting to unsigned
>
>sting?

oops, typo, string.
>
>> long long in 'compressed' period.
>> 
>> Signed-off-by: Chao Fan <fanc.fnst@...fujitsu.com>
>> ---
>>  arch/x86/boot/compressed/misc.c | 88 +++++++++++++++++++++++++++++++++
>>  arch/x86/boot/compressed/misc.h |  4 ++
>>  2 files changed, 92 insertions(+)
>
>Why do you need to copy things?
>
>You can link that file into compressed/ as lib/kstrtox.c is a library or
>include it similar to what arch/x86/boot/compressed/cmdline.c does.
>
>Still better than copying the code.

I will have a try, thanks for your suggestion.

>
>> diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
>> index 008fdc47a29c..40378408d980 100644
>> --- a/arch/x86/boot/compressed/misc.h
>> +++ b/arch/x86/boot/compressed/misc.h
>> @@ -63,6 +63,10 @@ static inline void debug_puthex(const char *s)
>>  
>>  #endif
>>  
>> +#if (defined CONFIG_RANDOMIZE_BASE) && (defined CONFIG_RANDOMIZE_BASE)
>
>CONFIG_RANDOMIZE_BASE twice huh? Once not enough?

Sorry for that, the second should be CONFIG_MEMORY_HOTREMOVE.

Thanks,
Chao Fan

>
>:-)
>
>-- 
>Regards/Gruss,
>    Boris.
>
>Good mailing practices for 400: avoid top-posting and trim the reply.
>
>