38 lines
1.2 KiB
Diff
38 lines
1.2 KiB
Diff
From 606fd08b1bfce6d81c9532a9ecbbbe88aa266793 Mon Sep 17 00:00:00 2001
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From: Olivier Matz <olivier.matz@6wind.com>
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Date: Thu, 28 Nov 2024 12:09:56 +0100
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Subject: [PATCH] net/virtio: fix Rx checksum calculation
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If hdr->csum_start is larger than packet length, the len argument passed
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to rte_raw_cksum_mbuf() overflows and causes a segmentation fault.
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Ignore checksum computation in this case.
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CVE-2024-11614
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Fixes: ca7036b4af3a ("vhost: fix offload flags in Rx path")
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Signed-off-by: Maxime Gouin <maxime.gouin@6wind.com>
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Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
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Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
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---
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lib/vhost/virtio_net.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
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index 6d53ff932d..e42aabf126 100644
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--- a/lib/vhost/virtio_net.c
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+++ b/lib/vhost/virtio_net.c
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@@ -2831,6 +2831,9 @@ vhost_dequeue_offload(struct virtio_net *dev, struct virtio_net_hdr *hdr,
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*/
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uint16_t csum = 0, off;
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+ if (hdr->csum_start >= rte_pktmbuf_pkt_len(m))
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+ return;
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+
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if (rte_raw_cksum_mbuf(m, hdr->csum_start,
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rte_pktmbuf_pkt_len(m) - hdr->csum_start, &csum) < 0)
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return;
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--
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2.47.0
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