Fix an IsZeroMemory() ASSERTion failure

The TargetProcessor field of the XENVIF_RECEIVER_RING structure is not being
cleared and hence may be non-zero when the buffer is checked. This patch
rectifies the situation.

Fixes: eb83dbd5162d ("Windows PV drivers fail to set up RSS when vCPU index >= 8")
Signed-off-by: Paul Durrant <pdurrant@amazon.com>

diff --git a/src/xenvif/receiver.c b/src/xenvif/receiver.c
index 505505ee886ecd6203baee9dd529eb814783d2db..d4703b9bd322f7e41d695a55f44316f1ee6187a7 100644 (file)
--- a/src/xenvif/receiver.c
+++ b/src/xenvif/receiver.c
@@ -2963,6 +2963,8 @@ __ReceiverRingTeardown(
     Ring->BackfillSize = 0;
     Ring->OffloadOptions.Value = 0;
 
+    RtlZeroMemory(&Ring->TargetProcessor, sizeof (PROCESSOR_NUMBER));
+
     KeFlushQueuedDpcs();
     RtlZeroMemory(&Ring->QueueDpc, sizeof (KDPC));