Re: FAILED: patch "[PATCH] crypto: virtio: Fix src/dst scatterlist calculation in" failed to apply to 5.4-stable tree

[Sasha Levin <sashal@kernel.org>]

On Mon, Jun 15, 2020 at 10:19:45PM +0200, gregkh@linuxfoundation.org wrote:
>
>The patch below does not apply to the 5.4-stable tree.
>If someone wants it applied there, or to any other stable or longterm
>tree, then please email the backport, including the original git commit
>id to <stable@vger.kernel.org>.
>
>thanks,
>
>greg k-h
>
>------------------ original commit in Linus's tree ------------------
>
>From b02989f37fc5e865ceeee9070907e4493b3a21e2 Mon Sep 17 00:00:00 2001
>From: "Longpeng(Mike)" <longpeng2@huawei.com>
>Date: Tue, 2 Jun 2020 15:04:59 +0800
>Subject: [PATCH] crypto: virtio: Fix src/dst scatterlist calculation in
> __virtio_crypto_skcipher_do_req()
>
>The system will crash when the users insmod crypto/tcrypt.ko with mode=38
>( testing "cts(cbc(aes))" ).
>
>Usually the next entry of one sg will be @sg@ + 1, but if this sg element
>is part of a chained scatterlist, it could jump to the start of a new
>scatterlist array. Fix it by sg_next() on calculation of src/dst
>scatterlist.
>
>Fixes: dbaf0624ffa5 ("crypto: add virtio-crypto driver")
>Reported-by: LABBE Corentin <clabbe@baylibre.com>
>Cc: Herbert Xu <herbert@gondor.apana.org.au>
>Cc: "Michael S. Tsirkin" <mst@redhat.com>
>Cc: Jason Wang <jasowang@redhat.com>
>Cc: "David S. Miller" <davem@davemloft.net>
>Cc: virtualization@lists.linux-foundation.org
>Cc: linux-kernel@vger.kernel.org
>Cc: stable@vger.kernel.org
>Link: https://lore.kernel.org/r/20200123101000.GB24255@Red
>Signed-off-by: Gonglei <arei.gonglei@huawei.com>
>Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com>
>Link: https://lore.kernel.org/r/20200602070501.2023-2-longpeng2@huawei.com
>Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

I've worked around missing eee1d6fca0a0 ("crypto: virtio - switch to
skcipher API") and queued it for 5.4, 4.19, and 4.14.

-- 
Thanks,
Sasha