Re: [Patch 2.6] dm-crypt: zero key before freeing it

On Wed, 2006-01-04 at 21:08 +0100, Stefan Rompf wrote:
> Hi Andrew,
> 
> dm-crypt does not clear struct crypt_config before freeing it. Thus, 
> information on the key could leak f.e. to a swsusp image even after the 
> encrypted device has been removed. The attached patch against 2.6.14 / 2.6.15 
> fixes it.

since a memset right before a free is a very unusual code pattern in the
kernel it may well be worth putting a short comment around it to prevent
someone later removing it as "optimization"


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