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:	Thu, 14 Jan 2016 12:35:37 -0600
From:	Eric Sandeen <sandeen@...hat.com>
To:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] mke2fs: don't accept too-high revision levels

Came across this, still not merged, so ping?

On 5/1/14 2:55 PM, Eric Sandeen wrote:
> It's a bit strange to accept revision levels higher than
> the code creating the filesystem can understand, so don't
> allow it.
> 
> At least the kernel will mount the fs readonly if it's too
> high, but no other utility will touch it, so you can't
> fix the error.
> 
> Just reject anything > EXT2_MAX_SUPP_REV at mkfs time.
> 
> Signed-off-by: Eric Sandeen <sandeen@...hat.com>
> ---
> 
> diff --git a/misc/mke2fs.c b/misc/mke2fs.c
> index aecd5d5..82019dc 100644
> --- a/misc/mke2fs.c
> +++ b/misc/mke2fs.c
> @@ -1679,9 +1679,10 @@ profile_error:
>  			break;
>  		case 'r':
>  			r_opt = strtoul(optarg, &tmp, 0);
> -			if (*tmp) {
> +			if (*tmp || (r_opt > EXT2_MAX_SUPP_REV)) {
>  				com_err(program_name, 0,
> -					_("bad revision level - %s"), optarg);
> +					_("bad revision level - %s (max %d)"),
> +					   optarg, EXT2_MAX_SUPP_REV);
>  				exit(1);
>  			}
>  			fs_param.s_rev_level = r_opt;
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists