It is possible that during a page fault handling, the process that owns
the MR is terminating. The indication for it is failure to get the
task_struct or take reference on the mm_struct. In this case just abort
the page-fault handler with error but without a warning to the kernel log.
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
* mmget_not_zero will fail in this case.
*/
owning_process = get_pid_task(umem_odp->per_mm->tgid, PIDTYPE_PID);
- if (WARN_ON(!mmget_not_zero(umem_odp->umem.owning_mm))) {
+ if (!owning_process || !mmget_not_zero(owning_mm)) {
ret = -EINVAL;
goto out_put_task;
}