From: Al Viro viro@zeniv.linux.org.uk
commit 1f08529c84cfecaf1261ed9b7e17fab18541c58f upstream.
We should not play with dcache without parent locked...
Cc: stable@vger.kernel.org Signed-off-by: Al Viro viro@zeniv.linux.org.uk Signed-off-by: Jeff Layton jlayton@kernel.org Signed-off-by: Ilya Dryomov idryomov@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/ceph/inode.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1399,6 +1399,7 @@ retry_lookup: dout(" final dn %p\n", dn); } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || req->r_op == CEPH_MDS_OP_MKSNAP) && + test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { struct dentry *dn = req->r_dentry; struct inode *dir = req->r_parent;