Minor 0 is the VFIO container device (/dev/vfio/vfio). On it's own
the container does not provide a user with any privileged access. It
only supports API version check and extension check ioctls. Only by
attaching a VFIO group to the container does it gain any access. Set
the mode of the container to allow access.
Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
---
drivers/vfio/vfio.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index ac7423b..acb7121 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -27,6 +27,7 @@
#include <linux/rwsem.h>
#include <linux/sched.h>
#include <linux/slab.h>
+#include <linux/stat.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include <linux/vfio.h>
@@ -1359,6 +1360,9 @@ static const struct file_operations vfio_device_fops = {
*/
static char *vfio_devnode(struct device *dev, umode_t *mode)
{
+ if (MINOR(dev->devt) == 0)
+ *mode = S_IRUGO | S_IWUGO;
+
return kasprintf(GFP_KERNEL, "vfio/%s", dev_name(dev));
}
--
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