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IB/core: Bound check alternate path port number

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The alternate port number is used as an array index in the IB
security implementation, invalid values can result in a kernel panic.

Cc: <stable@vger.kernel.org> # v4.12
Fixes: d291f1a652 ("IB/core: Enforce PKey security on QPs")
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Daniel Jurgens 2017-12-05 22:30:01 +02:00 committed by Doug Ledford
parent 315d160c5a
commit 4cae8ff136
1 changed files with 6 additions and 0 deletions
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6
drivers/infiniband/core/uverbs_cmd.c
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@ -1971,6 +1971,12 @@ static int modify_qp(struct ib_uverbs_file *file,
goto release_qp;
}
if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
!rdma_is_port_valid(qp->device, cmd->base.alt_port_num)) {
ret = -EINVAL;
goto release_qp;
}
attr->qp_state = cmd->base.qp_state;
attr->cur_qp_state = cmd->base.cur_qp_state;
attr->path_mtu = cmd->base.path_mtu;