netdev - [PATCH AUTOSEL 4.19 070/209] ixgbe: Fix crash with VFs and flow director on interface flap

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20191113015025.9685-70-sashal@kernel.org>
Date:   Tue, 12 Nov 2019 20:48:06 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Radoslaw Tyl <radoslawx.tyl@...el.com>,
        Andrew Bowers <andrewx.bowers@...el.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 070/209] ixgbe: Fix crash with VFs and flow director on interface flap

From: Radoslaw Tyl <radoslawx.tyl@...el.com>

[ Upstream commit 5d826d209164b0752c883607be4cdbbcf7cab494 ]

This patch fix crash when we have restore flow director filters after reset
adapter. In ixgbe_fdir_filter_restore() filter->action is outside of the
rx_ring array, as it has a VF identifier in the upper 32 bits.

Signed-off-by: Radoslaw Tyl <radoslawx.tyl@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index f3e21de3b1f0b..b45a6e2ed8d15 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -5187,6 +5187,7 @@ static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
 	struct ixgbe_hw *hw = &adapter->hw;
 	struct hlist_node *node2;
 	struct ixgbe_fdir_filter *filter;
+	u64 action;
 
 	spin_lock(&adapter->fdir_perfect_lock);
 
@@ -5195,12 +5196,17 @@ static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
 
 	hlist_for_each_entry_safe(filter, node2,
 				  &adapter->fdir_filter_list, fdir_node) {
+		action = filter->action;
+		if (action != IXGBE_FDIR_DROP_QUEUE && action != 0)
+			action =
+			(action >> ETHTOOL_RX_FLOW_SPEC_RING_VF_OFF) - 1;
+
 		ixgbe_fdir_write_perfect_filter_82599(hw,
 				&filter->filter,
 				filter->sw_idx,
-				(filter->action == IXGBE_FDIR_DROP_QUEUE) ?
+				(action == IXGBE_FDIR_DROP_QUEUE) ?
 				IXGBE_FDIR_DROP_QUEUE :
-				adapter->rx_ring[filter->action]->reg_idx);
+				adapter->rx_ring[action]->reg_idx);
 	}
 
 	spin_unlock(&adapter->fdir_perfect_lock);
-- 
2.20.1