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IB/mlx5: Fix stack info leak in mlx5_ib_alloc_ucontext()

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We don't set "resp.reserved".  Since it's at the end of the struct
that means we don't have to copy it to the user.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Dan Carpenter 2013-07-25 20:04:36 +03:00 committed by Roland Dreier
parent 281d1a9211
commit 92b0ca7cb1
1 changed files with 2 additions and 1 deletions
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3
drivers/infiniband/hw/mlx5/main.c
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@ -619,7 +619,8 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev,
resp.tot_uuars = req.total_num_uuars;
resp.num_ports = dev->mdev.caps.num_ports;
err = ib_copy_to_udata(udata, &resp, sizeof(resp));
err = ib_copy_to_udata(udata, &resp,
sizeof(resp) - sizeof(resp.reserved));
if (err)
goto out_uars;