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authorDan Carpenter <dan.carpenter@oracle.com>2020-10-23 14:34:50 +0300
committerAlex Williamson <alex.williamson@redhat.com>2020-11-02 15:00:06 -0700
commit09699e56dee946a16767021af97411ed6f4b3e6b (patch)
tree48550a0d839441495ef35d09a395f2dc009f8946 /drivers/vfio
parent572f64c71e0fe30089699b22ce0ca3d4bf452ce9 (diff)
downloadlinux-09699e56dee946a16767021af97411ed6f4b3e6b.tar.bz2
vfio/fsl-mc: return -EFAULT if copy_to_user() fails
The copy_to_user() function returns the number of bytes remaining to be copied, but this code should return -EFAULT. Fixes: df747bcd5b21 ("vfio/fsl-mc: Implement VFIO_DEVICE_GET_REGION_INFO ioctl call") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Diana Craciun <diana.craciun@oss.nxp.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio')
-rw-r--r--drivers/vfio/fsl-mc/vfio_fsl_mc.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
index 0113a980f974..21f22e3da11f 100644
--- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c
+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
@@ -248,7 +248,9 @@ static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd,
info.size = vdev->regions[info.index].size;
info.flags = vdev->regions[info.index].flags;
- return copy_to_user((void __user *)arg, &info, minsz);
+ if (copy_to_user((void __user *)arg, &info, minsz))
+ return -EFAULT;
+ return 0;
}
case VFIO_DEVICE_GET_IRQ_INFO:
{
@@ -267,7 +269,9 @@ static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd,
info.flags = VFIO_IRQ_INFO_EVENTFD;
info.count = 1;
- return copy_to_user((void __user *)arg, &info, minsz);
+ if (copy_to_user((void __user *)arg, &info, minsz))
+ return -EFAULT;
+ return 0;
}
case VFIO_DEVICE_SET_IRQS:
{