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authorKen Chen <kenchen@google.com>2008-01-14 00:55:19 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-01-14 08:52:23 -0800
commit68842c9b94560e647e8e7cc75cbb3dbe59f6fcb5 (patch)
tree58220ff2840a62155d3e7f934bc39e4cea673b39 /mm
parentadvansys: fix section mismatch warning (diff)
downloadlinux-dev-68842c9b94560e647e8e7cc75cbb3dbe59f6fcb5.tar.xz
linux-dev-68842c9b94560e647e8e7cc75cbb3dbe59f6fcb5.zip
hugetlbfs: fix quota leak
In the error path of both shared and private hugetlb page allocation, the file system quota is never undone, leading to fs quota leak. Fix them up. [akpm@linux-foundation.org: cleanup, micro-optimise] Signed-off-by: Ken Chen <kenchen@google.com> Acked-by: Adam Litke <agl@us.ibm.com> Cc: David Gibson <david@gibson.dropbear.id.au> Cc: William Lee Irwin III <wli@holomorphy.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/hugetlb.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 7224a4f07106..e0fda156f021 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -418,9 +418,14 @@ static struct page *alloc_huge_page_private(struct vm_area_struct *vma,
if (free_huge_pages > resv_huge_pages)
page = dequeue_huge_page(vma, addr);
spin_unlock(&hugetlb_lock);
- if (!page)
+ if (!page) {
page = alloc_buddy_huge_page(vma, addr);
- return page ? page : ERR_PTR(-VM_FAULT_OOM);
+ if (!page) {
+ hugetlb_put_quota(vma->vm_file->f_mapping, 1);
+ return ERR_PTR(-VM_FAULT_OOM);
+ }
+ }
+ return page;
}
static struct page *alloc_huge_page(struct vm_area_struct *vma,
@@ -1206,8 +1211,10 @@ int hugetlb_reserve_pages(struct inode *inode, long from, long to)
if (hugetlb_get_quota(inode->i_mapping, chg))
return -ENOSPC;
ret = hugetlb_acct_memory(chg);
- if (ret < 0)
+ if (ret < 0) {
+ hugetlb_put_quota(inode->i_mapping, chg);
return ret;
+ }
region_add(&inode->i_mapping->private_list, from, to);
return 0;
}