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Date:   Mon, 3 Aug 2020 22:52:43 +1000
From:   Herbert Xu <herbert@gondor.apana.org.au>
To:     Liwei Song <liwei.song@windriver.com>
Cc:     Tom Lendacky <thomas.lendacky@amd.com>,
        Gary Hook <gary.hook@amd.com>, David <davem@davemloft.net>,
        linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] crypto: ccp - zero the cmd data after use it
Message-ID: <20200803125242.GA7689@gondor.apana.org.au>
References: <20200803075858.3561-1-liwei.song@windriver.com>
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On Mon, Aug 03, 2020 at 03:58:58PM +0800, Liwei Song wrote:
> exist the following assignment in ccp(ignore the force
> convert of the struct) by list_del in ccp_dequeue_cmd():
> req->__ctx->cmd->entry->next = LIST_POISON1;
> 
> after use the req, kzfree(req) can not zero the entry
> entry->next = LIST_POISON1 of the ccp_cmd(cmd) struct
> when this address available as slub freelist pointer, this will cause
> the following "general protection fault" error if some process meet
> this LIST_POISON1 value address when request memory:

Your description makes no sense.  Please rewrite it and explain
the problem properly.

Thanks,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
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