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[5/7] virtio-net: Initialize hash reporting values

Message ID 20240915-queue-v1-5-b49bd49b926d@daynix.com (mailing list archive)
State New, archived
Headers show
Series virtio-net fixes | expand

Commit Message

Akihiko Odaki Sept. 15, 2024, 1:06 a.m. UTC 
The specification says hash_report should be set to
VIRTIO_NET_HASH_REPORT_NONE if VIRTIO_NET_F_HASH_REPORT is negotiated
but not configured with VIRTIO_NET_CTRL_MQ_RSS_CONFIG. However,
virtio_net_receive_rcu() instead wrote out the content of the extra_hdr
variable, which is not uninitialized in such a case.

Fix this by zeroing the extra_hdr.

Fixes: e22f0603fb2f ("virtio-net: reference implementation of hash report")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 hw/net/virtio-net.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 3753c6aaca83..3fc1d10cb9e0 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -1901,6 +1901,8 @@  static ssize_t virtio_net_receive_rcu(NetClientState *nc, const uint8_t *buf,
     size_t offset, i, guest_offset, j;
     ssize_t err;
 
+    memset(&extra_hdr, 0, sizeof(extra_hdr));
+
     if (n->rss_data.enabled && n->rss_data.enabled_software_rss) {
         int index = virtio_net_process_rss(nc, buf, size, &extra_hdr);
         if (index >= 0) {