[Qemu-devel] [PATCH 1/2] net: assert that tx packets have nonzero size

[Oleinik, Alexander]

Virtual devices should not try to send zero-sized packets. The caller
should check the size prior to calling qemu_sendv_packet_async.

Signed-off-by: Alexander Oleinik <address@hidden>
---
 net/net.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/net.c b/net/net.c
index 7d4098254f..fad20bc611 100644
--- a/net/net.c
+++ b/net/net.c
@@ -741,6 +741,9 @@ ssize_t qemu_sendv_packet_async(NetClientState *sender,
     size_t size = iov_size(iov, iovcnt);
     int ret;
 
+    /* 0-sized packets are unsupported. Check size in the caller */
+    assert(size);
+
     if (size > NET_BUFSIZE) {
         return size;
     }
-- 
2.20.1