From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Sun, 11 Oct 2020 08:38:42 +0000 (+0200)
Subject: 4.9-stable patches
X-Git-Tag: v4.4.239~51
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6562ea4831b6f985d6c480a98f007fa9b9370c71;p=thirdparty%2Fkernel%2Fstable-queue.git

4.9-stable patches

added patches:
	macsec-avoid-use-after-free-in-macsec_handle_frame.patch
---

diff --git a/queue-4.9/macsec-avoid-use-after-free-in-macsec_handle_frame.patch b/queue-4.9/macsec-avoid-use-after-free-in-macsec_handle_frame.patch
new file mode 100644
index 00000000000..665a61a1b5b
--- /dev/null
+++ b/queue-4.9/macsec-avoid-use-after-free-in-macsec_handle_frame.patch
@@ -0,0 +1,45 @@
+From c7cc9200e9b4a2ac172e990ef1975cd42975dad6 Mon Sep 17 00:00:00 2001
+From: Eric Dumazet <edumazet@google.com>
+Date: Wed, 7 Oct 2020 01:42:46 -0700
+Subject: macsec: avoid use-after-free in macsec_handle_frame()
+
+From: Eric Dumazet <edumazet@google.com>
+
+commit c7cc9200e9b4a2ac172e990ef1975cd42975dad6 upstream.
+
+De-referencing skb after call to gro_cells_receive() is not allowed.
+We need to fetch skb->len earlier.
+
+Fixes: 5491e7c6b1a9 ("macsec: enable GRO and RPS on macsec devices")
+Signed-off-by: Eric Dumazet <edumazet@google.com>
+Cc: Paolo Abeni <pabeni@redhat.com>
+Acked-by: Paolo Abeni <pabeni@redhat.com>
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/net/macsec.c |    4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+--- a/drivers/net/macsec.c
++++ b/drivers/net/macsec.c
+@@ -1087,6 +1087,7 @@ static rx_handler_result_t macsec_handle
+ 	struct macsec_rx_sa *rx_sa;
+ 	struct macsec_rxh_data *rxd;
+ 	struct macsec_dev *macsec;
++	unsigned int len;
+ 	sci_t sci;
+ 	u32 pn;
+ 	bool cbit;
+@@ -1242,9 +1243,10 @@ deliver:
+ 	macsec_rxsc_put(rx_sc);
+ 
+ 	skb_orphan(skb);
++	len = skb->len;
+ 	ret = gro_cells_receive(&macsec->gro_cells, skb);
+ 	if (ret == NET_RX_SUCCESS)
+-		count_rx(dev, skb->len);
++		count_rx(dev, len);
+ 	else
+ 		macsec->secy.netdev->stats.rx_dropped++;
+ 
diff --git a/queue-4.9/series b/queue-4.9/series
index 818166c68af..b4864042880 100644
--- a/queue-4.9/series
+++ b/queue-4.9/series
@@ -32,3 +32,4 @@ driver-core-fix-probe_count-imbalance-in-really_probe.patch
 perf-top-fix-stdio-interface-input-handling-with-glibc-2.28.patch
 mtd-rawnand-sunxi-fix-the-probe-error-path.patch
 ftrace-move-rcu-is-watching-check-after-recursion-check.patch
+macsec-avoid-use-after-free-in-macsec_handle_frame.patch