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  PHC 
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Wed, 17 Oct 2007 21:09:25 -0700
From:	Andrew Morton <>
To:	Jan Kara <>
Subject: Re: [PATCH 2/2] ext2: Avoid rec_len overflow with 64KB block size

On Thu, 11 Oct 2007 13:18:49 +0200 Jan Kara <> wrote:

> With 64KB blocksize, a directory entry can have size 64KB which does not fit
> into 16 bits we have for entry lenght. So we store 0xffff instead and convert
> value when read from / written to disk.

btw, this changes ext2's on-disk format.

a) is the ext2 format documented anywhere?  If so, that document will
   need updating.

b) what happens when an old ext2 driver tries to read and/or write this
   directory entry?  Do we need a compat flag for it?

c) what happens when old and new ext3 or ext4 try to read/write this
   directory entry?

To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists