From 15e7b8767605dc0cb9bd4594caabfec392385210 Mon Sep 17 00:00:00 2001 From: Johannes Weiner Date: Fri, 13 Mar 2009 13:51:58 -0700 Subject: nommu: ramfs: don't leak pages when adding to page cache fails When a ramfs nommu mapping is expanded, contiguous pages are allocated and added to the pagecache. The caller's reference is then passed on by moving whole pagevecs to the file lru list. If the page cache adding fails, make sure that the error path also moves the pagevec contents which might still contain up to PAGEVEC_SIZE successfully added pages, of which we would leak references otherwise. Signed-off-by: Johannes Weiner Cc: David Howells Cc: Enrik Berkhan Cc: Nick Piggin Cc: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/ramfs/file-nommu.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/ramfs') diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c index 90d72bead55b..5d7c7ececa64 100644 --- a/fs/ramfs/file-nommu.c +++ b/fs/ramfs/file-nommu.c @@ -129,6 +129,7 @@ int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize) return -EFBIG; add_error: + pagevec_lru_add_file(&lru_pvec); page_cache_release(pages + loop); for (loop++; loop < npages; loop++) __free_page(pages + loop); -- cgit v1.2.3