linux-kernel - Re: [PATCH] Trusted and Encrypted Keys: fix up TSS_rawhmac() so we always kfree() and remember to call va

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Message-ID: <3820.1295011915@redhat.com>
Date:	Fri, 14 Jan 2011 13:31:55 +0000
From:	David Howells <dhowells@...hat.com>
To:	Jesper Juhl <jj@...osbits.net>,
	Mimi Zohar <zohar@...ux.vnet.ibm.com>
Cc:	dhowells@...hat.com, David Safford <safford@...ibm.com>,
	James Morris <jmorris@...ei.org>, keyrings@...ux-nfs.org,
	linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Trusted and Encrypted Keys: fix up TSS_rawhmac() so we always kfree() and remember to call va_end()

Jesper Juhl <jj@...osbits.net> wrote:

> In security/keys/trusted_defined.c::TSS_rawhmac() we may leak the storage 
> allocated to 'sdesc' if
>   data = va_arg(argp, unsigned char *);
> results in a NULL 'data' and we then leave the function by returning 
> -EINVAL. We also neglect calling va_end(argp) in that case and furthermore 
> we neglect va_end(argp) if
>   ret = crypto_shash_update(&sdesc->shash, data, dlen);
> results in ret being negative and we then jump to the 'out' label.
> 
> I believe this patch takes care of these issues. Please review and 
> consider for inclusion.
> 
> Signed-off-by: Jesper Juhl <jj@...osbits.net>

Acked-by: David Howells <dhowells@...hat.com>
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