On Wed, 07 Jun 2017 12:08:38 +1000 NeilBrown <ne...@suse.com> wrote: > > If a positive status is passed with the AUTOFS_DEV_IOCTL_FAIL > ioctl, autofs4_d_automount() will return > ERR_PTR(status) > with that status to follow_automount(), which will then > dereference an invalid pointer. > > So treat a positive status the same as zero, and map > to ENOENT. > > See comment in systemd src/core/automount.c::automount_send_ready(). > > ... > > --- a/fs/autofs4/dev-ioctl.c > +++ b/fs/autofs4/dev-ioctl.c > @@ -344,7 +344,7 @@ static int autofs_dev_ioctl_fail(struct file *fp, > int status; > > token = (autofs_wqt_t) param->fail.token; > - status = param->fail.status ? param->fail.status : -ENOENT; > + status = param->fail.status < 0 ? param->fail.status : -ENOENT; > return autofs4_wait_release(sbi, token, status); > }
Sounds serious. Was the absence of a cc:stable deliberate?
