diff options
| author | Ken Chen <kenchen@google.com> | 2008-01-14 00:55:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-01-14 08:52:23 -0800 |
| commit | 68842c9b94560e647e8e7cc75cbb3dbe59f6fcb5 (patch) | |
| tree | 58220ff2840a62155d3e7f934bc39e4cea673b39 /mm | |
| parent | 747d016e7e25e216b31022fe2b012508d99fb682 (diff) | |
| download | lwn-68842c9b94560e647e8e7cc75cbb3dbe59f6fcb5.tar.gz lwn-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.c | 13 |
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; } |