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  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]
Date:   Sun, 5 May 2019 18:34:38 -0400
From:   "Theodore Ts'o" <>
To:     Andreas Dilger <>
Subject: Re: [PATCH] mke2fs: fix check for absurdly large devices

On Thu, Apr 25, 2019 at 11:24:30PM +0200, Andreas Dilger wrote:
> The check in mke2fs is intended to be for the number of blocks in the
> filesystem exceeding the maximum number of addressable blocks in 2^32
> bitmaps, which is (2^32 * 8 bits/byte * blocksize) = 2^47 blocks,
> or 2^59 bytes = 512PiB for the common 4KiB blocksize.
> However, s_log_blocksize holds log2(blocksize_in_kb), so the current
> calculation is a factor of 2^10 too small.  This caused mke2fs to fail
> while trying to format a 900TB filesystem.
> Fixes: 101ef2e93c25 ("mke2fs: Avoid crashes / infinite loops for absurdly large devices")
> Signed-off-by: Andreas Dilger <>

Thanks, applied.

					- Ted

Powered by blists - more mailing lists