IB/mlx5: Fix kernel to user leak prevention logic
authorEli Cohen <eli@mellanox.com>
Tue, 3 Jan 2017 21:55:19 +0000 (23:55 +0200)
committerLeon Romanovsky <leon@kernel.org>
Sun, 8 Jan 2017 09:21:26 +0000 (11:21 +0200)
commitde8d6e02efbdb259c67832ccf027d7ace9b91d5d
tree8d9f209e2a7f8ba8b05d2800aac6ae067b97a90d
parent525dfa2cdce4f5ab76251b5e57ebabf4f2dfc40c
IB/mlx5: Fix kernel to user leak prevention logic

The logic was broken as it failed to update the response length for
architectures with PAGE_SIZE larger than 4kB. As a result further
extension of the ucontext response struct would fail.

Fixes: d69e3bcf7976 ('IB/mlx5: Mmap the HCA's core clock register to user-space')
Signed-off-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
drivers/infiniband/hw/mlx5/main.c