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-rw-r--r--mm/mmap.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index e8f019eecd0f..82999e0c3c31 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -502,6 +502,15 @@ static inline void init_vma_prep(struct vma_prepare *vp,
*/
static inline void vma_prepare(struct vma_prepare *vp)
{
+ vma_start_write(vp->vma);
+ if (vp->adj_next)
+ vma_start_write(vp->adj_next);
+ /* vp->insert is always a newly created VMA, no need for locking */
+ if (vp->remove)
+ vma_start_write(vp->remove);
+ if (vp->remove2)
+ vma_start_write(vp->remove2);
+
if (vp->file) {
uprobe_munmap(vp->vma, vp->vma->vm_start, vp->vma->vm_end);