Commit f9cac5ac authored by Yan, Zheng's avatar Yan, Zheng Committed by Ilya Dryomov
Browse files

ceph: fix double page_unlock() in page_mkwrite() 



ceph_update_writeable_page() unlocks the page on errors, so
page_mkwrite() should not unlock the page again.

Signed-off-by: default avatarYan, Zheng <zyan@redhat.com>
parent 1761b229

fs/ceph/addr.c

+4 −4
Original line number Diff line number Diff line
@@ -1378,11 +1378,13 @@ static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) 


	ret = VM_FAULT_NOPAGE;

	if ((off > size) ||

	    (page->mapping != inode->i_mapping))

	    (page->mapping != inode->i_mapping)) {

		unlock_page(page);

		goto out;

	}



	ret = ceph_update_writeable_page(vma->vm_file, off, len, page);

	if (ret == 0) {

	if (ret >= 0) {

		/* success.  we'll keep the page locked. */

		set_page_dirty(page);

		ret = VM_FAULT_LOCKED;
@@ -1393,8 +1395,6 @@ static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) 
			ret = VM_FAULT_SIGBUS;

	}

out:

	if (ret != VM_FAULT_LOCKED)

		unlock_page(page);

	if (ret == VM_FAULT_LOCKED ||

	    ci->i_inline_version != CEPH_INLINE_NONE) {

		int dirty;