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From 04c233dd15e3b5bc842af371c3433eb723ffb6e6 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Tue, 23 Mar 2021 22:11:13 -0400
Subject: [PATCH 1/8] net: remove an assert call in eth_get_gso_type
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RH-Author: Jon Maloy <jmaloy@redhat.com>
Message-id: <20210323221113.1893864-2-jmaloy@redhat.com>
Patchwork-id: 101364
O-Subject: [RHEL-8.4.0 qemu-kvm PATCH 1/1] net: remove an assert call in eth_get_gso_type
Bugzilla: 1939494
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
RH-Acked-by: Xiao Wang <jasowang@redhat.com>
RH-Acked-by: Thomas Huth <thuth@redhat.com>

From: Prasad J Pandit <pjp@fedoraproject.org>

eth_get_gso_type() routine returns segmentation offload type based on
L3 protocol type. It calls g_assert_not_reached if L3 protocol is
unknown, making the following return statement unreachable. Remove the
g_assert call, it maybe triggered by a guest user.

Reported-by: Gaoning Pan <pgn@zju.edu.cn>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>

(cherry picked from commit 7564bf7701f00214cdc8a678a9f7df765244def1)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 net/eth.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/eth.c b/net/eth.c
index 0c1d413ee2..1e0821c5f8 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -16,6 +16,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/log.h"
 #include "net/eth.h"
 #include "net/checksum.h"
 #include "net/tap.h"
@@ -71,9 +72,8 @@ eth_get_gso_type(uint16_t l3_proto, uint8_t *l3_hdr, uint8_t l4proto)
             return VIRTIO_NET_HDR_GSO_TCPV6 | ecn_state;
         }
     }
-
-    /* Unsupported offload */
-    g_assert_not_reached();
+    qemu_log_mask(LOG_UNIMP, "%s: probably not GSO frame, "
+        "unknown L3 protocol: 0x%04"PRIx16"\n", __func__, l3_proto);
 
     return VIRTIO_NET_HDR_GSO_NONE | ecn_state;
 }
-- 
2.27.0