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IB/mlx5: Fix data validation in mlx5_ib_alloc_ucontext 

The wrong buffer size was passed to ib_is_udata_cleared.

Signed-off-by: Haggai Abramovsky <hagaya@mellanox.com>
Reviewed-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Haggai Abramovsky 2016-01-14 19:12:56 +02:00 committed by Doug Ledford
parent 2deeb47729
commit dfbee8598d
1 changed files with 4 additions and 1 deletions
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5
drivers/infiniband/hw/mlx5/main.c
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@ -845,6 +845,9 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev,
if (!dev->ib_active)
return ERR_PTR(-EAGAIN);
if (udata->inlen < sizeof(struct ib_uverbs_cmd_hdr))
return ERR_PTR(-EINVAL);
reqlen = udata->inlen - sizeof(struct ib_uverbs_cmd_hdr);
if (reqlen == sizeof(struct mlx5_ib_alloc_ucontext_req))
ver = 0;
@ -871,7 +874,7 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev,
if (reqlen > sizeof(req) &&
!ib_is_udata_cleared(udata, sizeof(req),
udata->inlen - sizeof(req)))
reqlen - sizeof(req)))
return ERR_PTR(-EOPNOTSUPP);
req.total_num_uuars = ALIGN(req.total_num_uuars,