2018-08-15 12:57:19 +00:00
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From f8bc4b3be49e47dcf005ce12ef25071fe16bd45b Mon Sep 17 00:00:00 2001
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2015-12-17 08:24:01 +00:00
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From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
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<marmarek@invisiblethingslab.com>
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Date: Wed, 16 Dec 2015 05:22:24 +0100
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2018-08-15 12:57:19 +00:00
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Subject: [PATCH] xen-netfront: add range check for Tx response id
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2015-12-17 08:24:01 +00:00
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Tx response ID is fetched from shared page, so make sure it is sane
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before using it as an array index.
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This is part of XSA155.
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CC: stable@vger.kernel.org
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Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
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---
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drivers/net/xen-netfront.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
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2018-08-15 12:57:19 +00:00
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index 026d39702217..4150128ab893 100644
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2015-12-17 08:24:01 +00:00
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--- a/drivers/net/xen-netfront.c
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+++ b/drivers/net/xen-netfront.c
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2018-08-15 12:57:19 +00:00
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@@ -395,6 +395,7 @@ static void xennet_tx_buf_gc(struct netfront_queue *queue)
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2015-12-17 08:24:01 +00:00
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continue;
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id = txrsp.id;
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+ BUG_ON(id >= NET_TX_RING_SIZE);
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skb = queue->tx_skbs[id].skb;
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if (unlikely(gnttab_query_foreign_access(
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queue->grant_tx_ref[id]) != 0)) {
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--
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2018-08-15 12:57:19 +00:00
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2.17.1
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2015-12-17 08:24:01 +00:00
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