linux-kernel - Re: error: implicit declaration of function 'zero

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]

Date:	Wed, 07 Oct 2015 15:41:04 +0200
From:	Michal Sojka <sojkam1@....cvut.cz>
To:	Chris Metcalf <cmetcalf@...hip.com>
CC:	lkml <linux-kernel@...r.kernel.org>
Subject: Re: error: implicit declaration of function 'zero_bytemask'



On 7. října 2015 15:29:28 CEST, Chris Metcalf <cmetcalf@...hip.com> wrote:
>On 10/07/2015 08:53 AM, Michal Sojka wrote:
>> Dear Chris,
>>
>> the following commit breaks my Linux build.
>>
>>      commit 990486c8af044f89bddfbde1d1cf9fde449bedbf
>>      Author: Chris Metcalf <cmetcalf@...hip.com>
>>      Date:   Tue Oct 6 12:37:41 2015 -0400
>>       
>>          strscpy: zero any trailing garbage bytes in the destination
>>          
>>          It's possible that the destination can be shadowed in
>userspace
>>          (as, for example, the perf buffers are now).  So we should
>take
>>          care not to leak data that could be inspected by userspace.
>>
>> The error message is:
>>
>>      lib/string.c: In function 'strscpy':
>>      lib/string.c:209:4: error: implicit declaration of function
>'zero_bytemask' [-Werror=implicit-function-declaration]
>>      cc1: some warnings being treated as errors
>>
>> I compile the kernel for PowerPC (32 bit) with the attached config.
>
>Ah, it appears that big-endian powerpc does not provide
>zero_bytemask(), only little-endian.  I'll fix this in v3 of
>the patch series - thanks!

The patch is already in mainline so I guess a fixup patch would be more appropriate.

-- 
Odesláno z mého telefonu pomocí Kaiten Mail. Omluvte prosím mou stručnost.
--
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/