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-rw-r--r--mm/hugetlb.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 4c97c174e2e1..67a71191136e 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1949,7 +1949,10 @@ retry:
* the spinlock.
*/
if (write_access && !(vma->vm_flags & VM_SHARED))
- vma_needs_reservation(h, vma, address);
+ if (vma_needs_reservation(h, vma, address) < 0) {
+ ret = VM_FAULT_OOM;
+ goto backout_unlocked;
+ }
spin_lock(&mm->page_table_lock);
size = i_size_read(mapping->host) >> huge_page_shift(h);
@@ -1976,6 +1979,7 @@ out:
backout:
spin_unlock(&mm->page_table_lock);
+backout_unlocked:
unlock_page(page);
put_page(page);
goto out;
@@ -2004,8 +2008,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
entry = huge_ptep_get(ptep);
if (huge_pte_none(entry)) {
ret = hugetlb_no_page(mm, vma, address, ptep, write_access);
- mutex_unlock(&hugetlb_instantiation_mutex);
- return ret;
+ goto out_unlock;
}
ret = 0;
@@ -2019,7 +2022,10 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
* consumed.
*/
if (write_access && !pte_write(entry)) {
- vma_needs_reservation(h, vma, address);
+ if (vma_needs_reservation(h, vma, address) < 0) {
+ ret = VM_FAULT_OOM;
+ goto out_unlock;
+ }
if (!(vma->vm_flags & VM_SHARED))
pagecache_page = hugetlbfs_pagecache_page(h,
@@ -2039,6 +2045,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
put_page(pagecache_page);
}
+out_unlock:
mutex_unlock(&hugetlb_instantiation_mutex);
return ret;