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Patch "net/mlx4: Fix the check in attaching steering rules" has been added to the 4.9-stable tree

PATCH [email protected] 1 participant 1 message Apr 9, 2018

Subsystems (5)
Network drivers Stable branch Mellanox MLX4 core VPI driver Mellanox MLX4 IB driver +1 more subsystems
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This is a note to let you know that I've just added the patch titled

net/mlx4: Fix the check in attaching steering rules

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
net-mlx4-fix-the-check-in-attaching-steering-rules.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From foo@baz Mon Apr 9 17:09:24 CEST 2018

From: Talat Batheesh <[email protected]>
Date: Sun, 4 Jun 2017 14:30:07 +0300
Subject: net/mlx4: Fix the check in attaching steering rules

From: Talat Batheesh <[email protected]>

[ Upstream commit 6dc06c08bef1c746ff8da33dab677cfbacdcad32 ]

Our previous patch (cited below) introduced a regression for RAW Eth QPs.

Fix it by checking if the QP number provided by user-space exists, hence allowing steering rules to be added for valid QPs only.

Fixes 89c557687a32 ("net/mlx4_en: Avoid adding steering rules with invalid ring")
Reported-by Or Gerlitz <[email protected]>
Signed-off-by Talat Batheesh <[email protected]>
Signed-off-by Tariq Toukan <[email protected]>
Acked-by Or Gerlitz <[email protected]>
Reviewed-by Leon Romanovsky <[email protected]>
Signed-off-by David S. Miller <[email protected]>
Signed-off-by Sasha Levin <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 drivers/net/ethernet/mellanox/mlx4/en_ethtool.c |    5 -----
 drivers/net/ethernet/mellanox/mlx4/mcg.c        |   15 +++++++++++----
 drivers/net/ethernet/mellanox/mlx4/qp.c         |   13 +++++++++++++
 include/linux/mlx4/qp.h                         |    1 +
 4 files changed, 25 insertions(+), 9 deletions(-)
drivers/net/ethernet/mellanox/mlx4/en_ethtool.c +0 -5
@@ -1520,11 +1520,6 @@ static int mlx4_en_flow_replace(struct n
 		qpn = priv->drop_qp.qpn;
 	else if (cmd->fs.ring_cookie & EN_ETHTOOL_QP_ATTACH) {
 		qpn = cmd->fs.ring_cookie & (EN_ETHTOOL_QP_ATTACH - 1);
-		if (qpn < priv->rss_map.base_qpn ||
-		    qpn >= priv->rss_map.base_qpn + priv->rx_ring_num) {
-			en_warn(priv, "rxnfc: QP (0x%x) doesn't exist\n", qpn);
-			return -EINVAL;
-		}
 	} else {
 		if (cmd->fs.ring_cookie >= priv->rx_ring_num) {
 			en_warn(priv, "rxnfc: RX ring (%llu) doesn't exist\n",
drivers/net/ethernet/mellanox/mlx4/mcg.c +11 -4
@@ -35,6 +35,7 @@
 #include <linux/etherdevice.h>
 
 #include <linux/mlx4/cmd.h>
+#include <linux/mlx4/qp.h>
 #include <linux/export.h>
 
 #include "mlx4.h"

@@ -985,16 +986,21 @@ int mlx4_flow_attach(struct mlx4_dev *de
 	if (IS_ERR(mailbox))
 		return PTR_ERR(mailbox);
 
+	if (!mlx4_qp_lookup(dev, rule->qpn)) {
+		mlx4_err_rule(dev, "QP doesn't exist\n", rule);
+		ret = -EINVAL;
+		goto out;
+	}
+
 	trans_rule_ctrl_to_hw(rule, mailbox->buf);
 
 	size += sizeof(struct mlx4_net_trans_rule_hw_ctrl);
 
 	list_for_each_entry(cur, &rule->list, list) {
 		ret = parse_trans_rule(dev, cur, mailbox->buf + size);
-		if (ret < 0) {
-			mlx4_free_cmd_mailbox(dev, mailbox);
-			return ret;
-		}
+		if (ret < 0)
+			goto out;
+
 		size += ret;
 	}
 

@@ -1021,6 +1027,7 @@ int mlx4_flow_attach(struct mlx4_dev *de
 		}
 	}
 
+out:
 	mlx4_free_cmd_mailbox(dev, mailbox);
 
 	return ret;
drivers/net/ethernet/mellanox/mlx4/qp.c +13 -0
@@ -387,6 +387,19 @@ static void mlx4_qp_free_icm(struct mlx4
 		__mlx4_qp_free_icm(dev, qpn);
 }
 
+struct mlx4_qp *mlx4_qp_lookup(struct mlx4_dev *dev, u32 qpn)
+{
+	struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
+	struct mlx4_qp *qp;
+
+	spin_lock(&qp_table->lock);
+
+	qp = __mlx4_qp_lookup(dev, qpn);
+
+	spin_unlock(&qp_table->lock);
+	return qp;
+}
+
 int mlx4_qp_alloc(struct mlx4_dev *dev, int qpn, struct mlx4_qp *qp, gfp_t gfp)
 {
 	struct mlx4_priv *priv = mlx4_priv(dev);
include/linux/mlx4/qp.h +1 -0
@@ -470,6 +470,7 @@ struct mlx4_update_qp_params {
 	u16	rate_val;
 };
 
+struct mlx4_qp *mlx4_qp_lookup(struct mlx4_dev *dev, u32 qpn);
 int mlx4_update_qp(struct mlx4_dev *dev, u32 qpn,
 		   enum mlx4_update_qp_attr attr,
 		   struct mlx4_update_qp_params *params);

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/net-mlx4_en-avoid-adding-steering-rules-with-invalid-ring.patch queue-4.9/net-mlx4-fix-the-check-in-attaching-steering-rules.patch