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virtio-net: Initialize hash reporting values 

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: e22f0603fb ("virtio-net: reference implementation of hash report")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Akihiko Odaki 2024-11-22 14:03:11 +09:00 committed by Jason Wang
parent 1981fa9d7d
commit 17437418c4
1 changed files with 2 additions and 0 deletions
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2
hw/net/virtio-net.c
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@ -1911,6 +1911,8 @@ 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) {