From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: stable@dpdk.org
Cc: Olivier Matz <olivier.matz@6wind.com>,
Maxime Gouin <maxime.gouin@6wind.com>,
Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: [PATCH 23.11] net/virtio: fix Rx checksum calculation
Date: Tue, 17 Dec 2024 16:36:26 +0100 [thread overview]
Message-ID: <20241217153626.460687-1-maxime.coquelin@redhat.com> (raw)
From: Olivier Matz <olivier.matz@6wind.com>
If hdr->csum_start is larger than packet length, the len argument passed
to rte_raw_cksum_mbuf() overflows and causes a segmentation fault.
Ignore checksum computation in this case.
CVE-2024-11614
Fixes: ca7036b4af3a ("vhost: fix offload flags in Rx path")
Signed-off-by: Maxime Gouin <maxime.gouin@6wind.com>
Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
lib/vhost/virtio_net.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
index 5ec89719c6..49c2052eba 100644
--- a/lib/vhost/virtio_net.c
+++ b/lib/vhost/virtio_net.c
@@ -2831,6 +2831,9 @@ vhost_dequeue_offload(struct virtio_net *dev, struct virtio_net_hdr *hdr,
*/
uint16_t csum = 0, off;
+ if (hdr->csum_start >= rte_pktmbuf_pkt_len(m))
+ return;
+
if (rte_raw_cksum_mbuf(m, hdr->csum_start,
rte_pktmbuf_pkt_len(m) - hdr->csum_start, &csum) < 0)
return;
--
2.47.0
reply other threads:[~2024-12-17 15:36 UTC|newest]
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