From 68842c9b94560e647e8e7cc75cbb3dbe59f6fcb5 Mon Sep 17 00:00:00 2001 From: Ken Chen Date: Mon, 14 Jan 2008 00:55:19 -0800 Subject: [PATCH] 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 Acked-by: Adam Litke Cc: David Gibson Cc: William Lee Irwin III Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/hugetlb.c | 13 ++++++++++--- 1 file 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; }