linux-kernel - [PATCH 5.2 08/94] nfp: flower: prevent ingress block binds on internal ports

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:   Sun,  8 Sep 2019 13:41:04 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, John Hurley <john.hurley@...ronome.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 5.2 08/94] nfp: flower: prevent ingress block binds on internal ports

From: John Hurley <john.hurley@...ronome.com>

[ Upstream commit 739d7c5752b255e89ddbb1b0474f3b88ef5cd343 ]

Internal port TC offload is implemented through user-space applications
(such as OvS) by adding filters at egress via TC clsact qdiscs. Indirect
block offload support in the NFP driver accepts both ingress qdisc binds
and egress binds if the device is an internal port. However, clsact sends
bind notification for both ingress and egress block binds which can lead
to the driver registering multiple callbacks and receiving multiple
notifications of new filters.

Fix this by rejecting ingress block bind callbacks when the port is
internal and only adding filter callbacks for egress binds.

Fixes: 4d12ba42787b ("nfp: flower: allow offloading of matches on 'internal' ports")
Signed-off-by: John Hurley <john.hurley@...ronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/netronome/nfp/flower/offload.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/netronome/nfp/flower/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c
@@ -1280,9 +1280,10 @@ nfp_flower_setup_indr_tc_block(struct ne
 	struct nfp_flower_priv *priv = app->priv;
 	int err;
 
-	if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS &&
-	    !(f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS &&
-	      nfp_flower_internal_port_can_offload(app, netdev)))
+	if ((f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS &&
+	     !nfp_flower_internal_port_can_offload(app, netdev)) ||
+	    (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS &&
+	     nfp_flower_internal_port_can_offload(app, netdev)))
 		return -EOPNOTSUPP;
 
 	switch (f->command) {