diff options
| author |   Majd Dibbiny <majd@mellanox.com> | 2017-12-24 13:54:56 +0200 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2017-12-27 15:24:40 -0700 |
| commit | ad9a3668a434faca1339789ed2f043d679199309 (patch) | |
| tree | 6ae4f8fc84efe4a0db5750a696c24bc06dddbb09 /drivers/infiniband/hw/mlx5/mlx5_ib.h | |
| parent | IB/hfi: Only read capability registers if the capability exists (diff) | |
| download | linux-dev-ad9a3668a434faca1339789ed2f043d679199309.tar.xz linux-dev-ad9a3668a434faca1339789ed2f043d679199309.zip | |
IB/mlx5: Serialize access to the VMA list
User-space applications can do mmap and munmap directly at
any time.
Since the VMA list is not protected with a mutex, concurrent
accesses to the VMA list from the mmap and munmap can cause
data corruption. Add a mutex around the list.
Cc: <stable@vger.kernel.org> # v4.7
Fixes: 7c2344c3bbf9 ("IB/mlx5: Implements disassociate_ucontext API")
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/mlx5_ib.h')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mlx5_ib.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index 6dd8cac78de2..2c5f3533bbc9 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -115,6 +115,8 @@ enum { struct mlx5_ib_vma_private_data { struct list_head list; struct vm_area_struct *vma; + /* protect vma_private_list add/del */ + struct mutex *vma_private_list_mutex; }; struct mlx5_ib_ucontext { @@ -129,6 +131,8 @@ struct mlx5_ib_ucontext { /* Transport Domain number */ u32 tdn; struct list_head vma_private_list; + /* protect vma_private_list add/del */ + struct mutex vma_private_list_mutex; unsigned long upd_xlt_page; /* protect ODP/KSM */ |