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From: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
To: Bjorn Andersson <bjorn.andersson@linaro.org>,
	Ohad Ben-Cohen <ohad@wizery.com>,
	Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: <linux-remoteproc@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>,
	<linux-stm32@st-md-mailman.stormreply.com>,
	<arnaud.pouliquen@foss.st.com>, Jason Wang <jasowang@redhat.com>,
	"Michael S . Tsirkin" <mst@redhat.com>
Subject: [PATCH] rpmsg: virtio: don't let virtio core to validate used length
Date: Mon, 22 Nov 2021 17:08:12 +0100	[thread overview]
Message-ID: <20211122160812.25125-1-arnaud.pouliquen@foss.st.com> (raw)

For RX virtqueue, the used length is validated in all the three paths
(big, small and mergeable). For control vq, we never tries to use used
length. So this patch forbids the core to validate the used length.

Without patch the rpmsg client sample does not work.

Fixes: 939779f5152d ("virtio_ring: validate used buffer length")

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
---
base-commit: fa55b7dcdc43c1aa1ba12bca9d2dd4318c2a0dbf
---
 drivers/rpmsg/virtio_rpmsg_bus.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index 9c112aa65040..5f73f19c2c38 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -1054,6 +1054,7 @@ static struct virtio_driver virtio_ipc_driver = {
 	.feature_table_size = ARRAY_SIZE(features),
 	.driver.name	= KBUILD_MODNAME,
 	.driver.owner	= THIS_MODULE,
+	.suppress_used_validation = true,
 	.id_table	= id_table,
 	.probe		= rpmsg_probe,
 	.remove		= rpmsg_remove,
-- 
2.17.1


             reply	other threads:[~2021-11-22 16:08 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-22 16:08 Arnaud Pouliquen [this message]
2021-11-23  2:15 ` Jason Wang
2021-11-23  2:16   ` Jason Wang
2021-11-23  6:15 ` Michael S. Tsirkin
2021-11-23 13:31   ` Arnaud POULIQUEN
2021-11-24  2:12     ` Jason Wang
2021-11-24 15:48       ` Arnaud POULIQUEN

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