Re: [PATCH] crypto: drbg - set freed buffers to NULL

Herbert Xu
2018-04-20T16:55:23Z

On Thu, Apr 12, 2018 at 08:40:55AM +0200, Stephan Müller wrote:
> Add the Fixes, CC stable tags.
>
> ---8<---
>
> During freeing of the internal buffers used by the DRBG, set the pointer
> to NULL. It is possible that the context with the freed buffers is
> reused. In case of an error during initialization where the pointers
> do not yet point to allocated memory, the NULL value prevents a double
> free.
>
> Cc: stable@vger.kernel.org
> Fixes: 3cfc3b9721123 ("crypto: drbg - use aligned buffers")
> Signed-off-by: Stephan Mueller <smueller@chronox.de>
> Reported-by: syzbot+75397ee3df5c70164154@syzkaller.appspotmail.com

Patch applied. Thanks.
--
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