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| author |   Moni Shoua <monis@mellanox.com> | 2019-02-17 16:08:24 +0200 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2019-02-21 16:32:45 -0700 |
| commit | 4438ee3f130c9deeebaf39bb9108d02c0b57cc7f (patch) | |
| tree | 6f50b9d5e8e248f261b143e4565e7a28e34f6751 /drivers/infiniband/core | |
| parent | IB/mlx5: Validate correct PD before prefetch MR (diff) | |
| download | linux-dev-4438ee3f130c9deeebaf39bb9108d02c0b57cc7f.tar.xz linux-dev-4438ee3f130c9deeebaf39bb9108d02c0b57cc7f.zip | |
IB/core: Abort page fault handler silently during owning process exit
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>
Diffstat (limited to 'drivers/infiniband/core')
| -rw-r--r-- | drivers/infiniband/core/umem_odp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/core/umem_odp.c b/drivers/infiniband/core/umem_odp.c index 012044f16d1c..6013cf0b8f4f 100644 --- a/drivers/infiniband/core/umem_odp.c +++ b/drivers/infiniband/core/umem_odp.c @@ -618,7 +618,7 @@ int ib_umem_odp_map_dma_pages(struct ib_umem_odp *umem_odp, u64 user_virt, * 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; } |