linux-kernel - Re: [PATCH 3/7] drivers: char: mem: fix IS_ERROR

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: <20160217023310.GH17997@ZenIV.linux.org.uk>
Date:	Wed, 17 Feb 2016 02:33:10 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Andrzej Hajda <a.hajda@...sung.com>
Cc:	linux-kernel@...r.kernel.org,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 3/7] drivers: char: mem: fix IS_ERROR_VALUE usage

On Mon, Feb 15, 2016 at 03:35:21PM +0100, Andrzej Hajda wrote:
> diff --git a/drivers/char/mem.c b/drivers/char/mem.c
> index 4f6f94c..71025c2 100644
> --- a/drivers/char/mem.c
> +++ b/drivers/char/mem.c
> @@ -695,7 +695,7 @@ static loff_t memory_lseek(struct file *file, loff_t offset, int orig)
>  		offset += file->f_pos;
>  	case SEEK_SET:
>  		/* to avoid userland mistaking f_pos=-9 as -EBADF=-9 */
> -		if (IS_ERR_VALUE((unsigned long long)offset)) {
> +		if ((unsigned long long)offset >= -MAX_ERRNO) {
>  			ret = -EOVERFLOW;
>  			break;
>  		}

ACK