Messages in this thread Patch in this message |  | | | Date | Thu, 14 May 2009 15:51:40 -0700 | | From | Greg KH <> | | Subject | [patch 14/28] NFS: Close page_mkwrite() races |
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2.6.27-stable review patch. If anyone has any objections, please let us know.
------------------ From: Trond Myklebust <Trond.Myklebust@netapp.com>
commit 7fdf523067666b0eaff330f362401ee50ce187c4 upstream
Follow up to Nick Piggin's patches to ensure that nfs_vm_page_mkwrite returns with the page lock held, and sets the VM_FAULT_LOCKED flag.
See http://bugzilla.kernel.org/show_bug.cgi?id=12913
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nick Piggin <npiggin@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- fs/nfs/file.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -478,10 +478,10 @@ static int nfs_vm_page_mkwrite(struct vm ret = nfs_updatepage(filp, page, 0, pagelen); out_unlock: + if (!ret) + return VM_FAULT_LOCKED; unlock_page(page); - if (ret) - ret = VM_FAULT_SIGBUS; - return ret; + return VM_FAULT_SIGBUS; } static struct vm_operations_struct nfs_file_vm_ops = {
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