On 2020/9/9 下午11:41, Li Qiang wrote:
Free the 'page_list' when the 'npages' is zero.
Signed-off-by: Li Qiang <liq3ea@xxxxxxx>
---
drivers/vhost/vdpa.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 3fab94f88894..6a9fcaf1831d 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -609,8 +609,10 @@ static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v,
gup_flags |= FOLL_WRITE;
npages = PAGE_ALIGN(msg->size + (iova & ~PAGE_MASK)) >> PAGE_SHIFT;
- if (!npages)
- return -EINVAL;
+ if (!npages) {
+ ret = -EINVAL;
+ goto free_page;
+ }
mmap_read_lock(dev->mm);
@@ -666,6 +668,8 @@ static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v,
atomic64_sub(npages, &dev->mm->pinned_vm);
}
mmap_read_unlock(dev->mm);
+
+free_page:
free_page((unsigned long)page_list);
return ret;
}
Cc: stable@xxxxxxxxxxxxxxx
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
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