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 for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Fri, 31 May 2013 19:42:24 -0400
From:	Theodore Ts'o <>
To:	Jan Kara <>
Subject: Re: [PATCH 4/4] ext4: Fix overflow when counting used blocks on
 32-bit architectures

On Wed, May 29, 2013 at 02:05:33PM +0200, Jan Kara wrote:
> The arithmetics adding delalloc blocks to the number of used blocks in
> ext4_getattr() can easily overflow on 32-bit archs as we first multiply
> number of blocks by blocksize and then divide back by 512. Make the
> arithmetics more clever and also use proper type (unsigned long long
> instead of unsigned long).
> Signed-off-by: Jan Kara <>

I've applied these four patches to the ext4 tree, thanks!!

     	     	   		       - Ted
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