From: Vinod Koul <vkoul@kernel.org>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: T Pratham <t-pratham@ti.com>,
"David S. Miller" <davem@davemloft.net>,
Kamlesh Gurudasani <kamlesh@ti.com>,
Vignesh Raghavendra <vigneshr@ti.com>,
Praneeth Bajjuri <praneeth@ti.com>,
Manorit Chawdhry <m-chawdhry@ti.com>,
linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org,
dmaengine@vger.kernel.org
Subject: Re: [PATCH v5 2/2] crypto: ti: Add driver for DTHE V2 AES Engine (ECB, CBC)
Date: Wed, 18 Jun 2025 23:23:50 +0530 [thread overview]
Message-ID: <aFL9LsQQdG3WTjUD@vaman> (raw)
In-Reply-To: <aElSKF88vBsIOJMV@gondor.apana.org.au>
On 11-06-25, 17:53, Herbert Xu wrote:
> On Tue, Jun 03, 2025 at 06:07:29PM +0530, T Pratham wrote:
> >
> > + // Need to do a timeout to ensure finalise gets called if DMA callback fails for any reason
> > + ret = wait_for_completion_timeout(&rctx->aes_compl, msecs_to_jiffies(DTHE_DMA_TIMEOUT_MS));
>
> This doesn't look safe. What if the callback is invoked after a
> timeout? That would be a UAF.
>
> Does the DMA engine provide any timeout mechanism? If not, then
> you could do it with a delayed work struct. Just make sure that
> you cancel the work struct in the normal path callback. Vice versa
> you need to terminate the DMA job in the timeout work struct.
Typically no. Most of the hardware may not have capability, so we have
apis to terminate.
--
~Vinod
next prev parent reply other threads:[~2025-06-18 17:53 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-03 12:37 [PATCH v5 0/2] Add support for Texas Instruments DTHE V2 crypto accelerator T Pratham
2025-06-03 12:37 ` [PATCH v5 1/2] dt-bindings: crypto: Add binding for TI DTHE V2 T Pratham
2025-06-03 12:37 ` [PATCH v5 2/2] crypto: ti: Add driver for DTHE V2 AES Engine (ECB, CBC) T Pratham
2025-06-11 9:31 ` Herbert Xu
2025-06-11 9:32 ` Herbert Xu
2025-06-12 5:49 ` T Pratham
2025-06-11 9:53 ` Herbert Xu
2025-06-12 10:15 ` T Pratham
2025-06-16 2:49 ` Herbert Xu
2025-06-18 17:53 ` Vinod Koul [this message]
2025-06-17 4:27 ` [PATCH v5 0/2] Add support for Texas Instruments DTHE V2 crypto accelerator Eric Biggers
2025-06-18 10:30 ` Kamlesh Gurudasani
2025-06-18 17:58 ` Eric Biggers
2025-06-26 13:33 ` Kamlesh Gurudasani
2025-06-26 18:35 ` Eric Biggers
2025-06-20 3:07 ` Simon Richter
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