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| author | Jack Morgenstein <jackm@dev.mellanox.co.il> | 2016-11-27 16:18:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-26 10:23:46 +0300 |
| commit | c7a40c48f7a5c9148ee42ce9e312d0e2cf56e462 (patch) | |
| tree | d2342f913311adce5ea997f9ee5ceaef1ae5e7ab | |
| parent | 1be54a4ec45afb6c56d8802f238fd8c0a69e8029 (diff) | |
| download | linux-c7a40c48f7a5c9148ee42ce9e312d0e2cf56e462.tar.xz | |
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.c | 3 |
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]); |