From 50a9b214bc6c052caa05a210ebfc1bdf0d7085b2 Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Fri, 11 Sep 2009 12:33:12 -0400 Subject: [PATCH] Btrfs: fix btrfs page_mkwrite to return locked page This closes a whole where the page may be written before the page_mkwrite caller has a chance to dirty it (thanks to Nick Piggin) Signed-off-by: Chris Mason --- fs/btrfs/inode.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 233fe6f2612..c846482e798 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4552,11 +4552,14 @@ again: } ClearPageChecked(page); set_page_dirty(page); + SetPageUptodate(page); BTRFS_I(inode)->last_trans = root->fs_info->generation + 1; unlock_extent(io_tree, page_start, page_end, GFP_NOFS); out_unlock: + if (!ret) + return VM_FAULT_LOCKED; unlock_page(page); out: return ret; -- 2.20.1