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| author |   Leon Romanovsky <leonro@mellanox.com> | 2018-07-01 19:36:24 +0300 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2018-07-04 11:51:06 -0600 |
| commit | 5d9a2b0e28759e319a623da33940dbb3ce952b7d (patch) | |
| tree | 8abdeed3b94d508c602b239ba088024371c3f201 /drivers/infiniband/hw/i40iw | |
| parent | IB/mlx4: Test port number before querying type. (diff) | |
| download | linux-dev-5d9a2b0e28759e319a623da33940dbb3ce952b7d.tar.xz linux-dev-5d9a2b0e28759e319a623da33940dbb3ce952b7d.zip | |
RDMA/i40w: Hold read semaphore while looking after VMA
VMA lookup is supposed to be performed while mmap_sem is held.
Fixes: f26c7c83395b ("i40iw: Add 2MB page support")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/i40iw')
| -rw-r--r-- | drivers/infiniband/hw/i40iw/i40iw_verbs.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband/hw/i40iw/i40iw_verbs.c index 8884ff71a634..7d85414742ff 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c +++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c @@ -1410,6 +1410,7 @@ static void i40iw_set_hugetlb_values(u64 addr, struct i40iw_mr *iwmr) struct vm_area_struct *vma; struct hstate *h; + down_read(¤t->mm->mmap_sem); vma = find_vma(current->mm, addr); if (vma && is_vm_hugetlb_page(vma)) { h = hstate_vma(vma); @@ -1418,6 +1419,7 @@ static void i40iw_set_hugetlb_values(u64 addr, struct i40iw_mr *iwmr) iwmr->page_msk = huge_page_mask(h); } } + up_read(¤t->mm->mmap_sem); } /** |