* [PATCH] vdpa/mlx5: Fix pointer math in mlx5_vdpa_get_config()
@ 2020-08-08 9:32 Dan Carpenter
[not found] ` <BN8PR12MB3425E1FCC3E20A04182640D2AB470@BN8PR12MB3425.namprd12.prod.outlook.com>
0 siblings, 1 reply; 3+ messages in thread
From: Dan Carpenter @ 2020-08-08 9:32 UTC (permalink / raw)
To: Michael S. Tsirkin, Eli Cohen
Cc: linux-kernel, kernel-janitors, Parav Pandit, virtualization
There is a pointer math bug here so if "offset" is non-zero then this
will copy memory from beyond the end of the array.
Fixes: 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
drivers/vdpa/mlx5/net/mlx5_vnet.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 3ec44a4f0e45..9d1637cf772e 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1758,7 +1758,7 @@ static void mlx5_vdpa_get_config(struct vdpa_device *vdev, unsigned int offset,
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
if (offset + len < sizeof(struct virtio_net_config))
- memcpy(buf, &ndev->config + offset, len);
+ memcpy(buf, (u8 *)&ndev->config + offset, len);
}
static void mlx5_vdpa_set_config(struct vdpa_device *vdev, unsigned int offset, const void *buf,
--
2.27.0
_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
^ permalink raw reply related [flat|nested] 3+ messages in thread[parent not found: <BN8PR12MB3425E1FCC3E20A04182640D2AB470@BN8PR12MB3425.namprd12.prod.outlook.com>]
* Re: [PATCH] vdpa/mlx5: Fix pointer math in mlx5_vdpa_get_config() [not found] ` <BN8PR12MB3425E1FCC3E20A04182640D2AB470@BN8PR12MB3425.namprd12.prod.outlook.com> @ 2020-08-10 10:31 ` Dan Carpenter 2020-08-10 14:35 ` Michael S. Tsirkin 0 siblings, 1 reply; 3+ messages in thread From: Dan Carpenter @ 2020-08-10 10:31 UTC (permalink / raw) To: Eli Cohen Cc: Parav Pandit, Michael S. Tsirkin, kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Eli Cohen On Sun, Aug 09, 2020 at 06:34:04AM +0000, Eli Cohen wrote: > Acked-by: Eli Cohen <elic@nvidia.com> > > BTW, vdpa_sim has the same bug. > I sent a patch for that on April 6. [PATCH 2/2] vdpa: Fix pointer math bug in vdpasim_get_config() Jason acked the patch but it wasn't applied. regards, dan carpenter _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] vdpa/mlx5: Fix pointer math in mlx5_vdpa_get_config() 2020-08-10 10:31 ` Dan Carpenter @ 2020-08-10 14:35 ` Michael S. Tsirkin 0 siblings, 0 replies; 3+ messages in thread From: Michael S. Tsirkin @ 2020-08-10 14:35 UTC (permalink / raw) To: Dan Carpenter Cc: Parav Pandit, kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Eli Cohen, Eli Cohen On Mon, Aug 10, 2020 at 01:31:47PM +0300, Dan Carpenter wrote: > On Sun, Aug 09, 2020 at 06:34:04AM +0000, Eli Cohen wrote: > > Acked-by: Eli Cohen <elic@nvidia.com> > > > > BTW, vdpa_sim has the same bug. > > > > I sent a patch for that on April 6. > > [PATCH 2/2] vdpa: Fix pointer math bug in vdpasim_get_config() > > Jason acked the patch but it wasn't applied. > > regards, > dan carpenter Oh sorry. I'll drop my patch and queue yours then. _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2020-08-10 14:35 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-08-08 9:32 [PATCH] vdpa/mlx5: Fix pointer math in mlx5_vdpa_get_config() Dan Carpenter
[not found] ` <BN8PR12MB3425E1FCC3E20A04182640D2AB470@BN8PR12MB3425.namprd12.prod.outlook.com>
2020-08-10 10:31 ` Dan Carpenter
2020-08-10 14:35 ` Michael S. Tsirkin
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).