diff mbox series

[PULL,5/6] virtio-net: Initialize hash reporting values

Message ID 20241125060809.15543-6-jasowang@redhat.com (mailing list archive)
State New
Headers show
Series [PULL,1/6] net: checksum: Convert data to void * | expand

Commit Message

Jason Wang Nov. 25, 2024, 6:08 a.m. UTC 
From: Akihiko Odaki <akihiko.odaki@daynix.com>

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>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Jason Wang <jasowang@redhat.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 b544d2e91a..44ea72b50e 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -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) {