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-rw-r--r--drivers/vfio/pci/vfio_pci_rdwr.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/vfio/pci/vfio_pci_rdwr.c b/drivers/vfio/pci/vfio_pci_rdwr.c
index 4362d9e7baa3..f72323ef618f 100644
--- a/drivers/vfio/pci/vfio_pci_rdwr.c
+++ b/drivers/vfio/pci/vfio_pci_rdwr.c
@@ -240,17 +240,17 @@ ssize_t vfio_pci_mem_readwrite(struct vfio_pci_device *vdev, char __user *buf,
filled = 1;
} else {
/* Drop writes, fill reads with FF */
+ filled = min((size_t)(x_end - pos), count);
if (!iswrite) {
char val = 0xFF;
size_t i;
- for (i = 0; i < x_end - pos; i++) {
+ for (i = 0; i < filled; i++) {
if (put_user(val, buf + i))
goto out;
}
}
- filled = x_end - pos;
}
count -= filled;