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authorJack Morgenstein <jackm@dev.mellanox.co.il>2016-11-27 15:18:19 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-26 08:23:46 +0100
commitc7a40c48f7a5c9148ee42ce9e312d0e2cf56e462 (patch)
treed2342f913311adce5ea997f9ee5ceaef1ae5e7ab
parent1be54a4ec45afb6c56d8802f238fd8c0a69e8029 (diff)
IB/mlx4: Fix out-of-range array index in destroy qp flow
commit c482af646d0809a8d5e1b7f4398cce3592589b98 upstream. For non-special QPs, the port value becomes non-zero only at the RESET-to-INIT transition. If the QP has not undergone that transition, its port number value is still zero. If such a QP is destroyed before being moved out of the RESET state, subtracting one from the qp port number results in a negative value. Using that negative value as an index into the qp1_proxy array results in an out-of-bounds array reference. Fix this by testing that the QP type is one that uses qp1_proxy before using the port number. For special QPs of all types, the port number is specified at QP creation time. Fixes: 9433c188915c ("IB/mlx4: Invoke UPDATE_QP for proxy QP1 on MAC changes") Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/infiniband/hw/mlx4/qp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index f350f2d61c15..1c8b7c22c822 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -1207,7 +1207,8 @@ int mlx4_ib_destroy_qp(struct ib_qp *qp)
if (is_qp0(dev, mqp))
mlx4_CLOSE_PORT(dev->dev, mqp->port);
- if (dev->qp1_proxy[mqp->port - 1] == mqp) {
+ if (mqp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI &&
+ dev->qp1_proxy[mqp->port - 1] == mqp) {
mutex_lock(&dev->qp1_proxy_lock[mqp->port - 1]);
dev->qp1_proxy[mqp->port - 1] = NULL;
mutex_unlock(&dev->qp1_proxy_lock[mqp->port - 1]);