linux-kernel - Re: [PATCHv4] fat: don't use custom hex_to

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:	Fri, 30 Sep 2011 03:27:48 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Joe Perches <joe@...ches.com>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCHv4] fat: don't use custom hex_to_bin()

Joe Perches <joe@...ches.com> writes:

>> +
>> +					if (hex2bin(uc, ip + 1, 2) < 0)
>>  						return -EINVAL;
>> -					}
>> -					*op++ = ec & 0xFF;
>> -					*op++ = ec >> 8;
>> +
>> +					*(wchar_t *)op++ = uc[0] << 8 | uc[1];
>
> perhaps:
>
> 	__le16	foo;
>
> 	if (hex2bin((u8 *)&foo, ip + 1, 2) < 0)
> 		return -EINVAL;
> 	*(u16 *)op = le16_to_cpu(foo);
>
> 	op += 2;

I also thought about it. But I think it is not so good, like you had
mistake.  It should actually be "__be16 foo" and "be16_to_cpu()".

If we used sscanf() instead of hex2bin(), I might agree to use
"le16_to_cpu()" though.

Thanks.
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
--
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/