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authorDave Barach <dave@barachs.net>2019-07-23 16:28:36 -0400
committerDave Barach <dave@barachs.net>2019-07-23 16:29:10 -0400
commit3940de36728b768574a3e998389bb90d55f690d1 (patch)
treef3c04d65748319ca38cbabce43c918f7ea745f1d /src/vnet/devices/tap/tap.c
parentb725ebb3f47302c416e41c7be3f5a8bb3c9fe547 (diff)
api: binary api cleanup
Multiple API message handlers call vnet_get_sup_hw_interface(...) without checking the inbound sw_if_index. This can cause a pool_elt_at_index ASSERT in a debug image, and major disorder in a production image. Given that a number of places are coded as follows, add an "api_visible_or_null" variant of vnet_get_sup_hw_interface, which returns NULL given an invalid sw_if_index, or a hidden sw interface: - hw = vnet_get_sup_hw_interface (vnm, sw_if_index); + hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index); if (hw == NULL || memif_device_class.index != hw->dev_class_index) return clib_error_return (0, "not a memif interface"); Rename two existing xxx_safe functions -> xxx_or_null to make it obvious what they return. Type: fix Change-Id: I29996e8d0768fd9e0c5495bd91ff8bedcf2c5697 Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'src/vnet/devices/tap/tap.c')
-rw-r--r--src/vnet/devices/tap/tap.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/vnet/devices/tap/tap.c b/src/vnet/devices/tap/tap.c
index c090bedbd7f..974a4175fa6 100644
--- a/src/vnet/devices/tap/tap.c
+++ b/src/vnet/devices/tap/tap.c
@@ -514,7 +514,7 @@ tap_delete_if (vlib_main_t * vm, u32 sw_if_index)
virtio_if_t *vif;
vnet_hw_interface_t *hw;
- hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
+ hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
return VNET_API_ERROR_INVALID_SW_IF_INDEX;
@@ -565,9 +565,11 @@ tap_gso_enable_disable (vlib_main_t * vm, u32 sw_if_index, int enable_disable)
vnet_main_t *vnm = vnet_get_main ();
virtio_main_t *mm = &virtio_main;
virtio_if_t *vif;
- vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
+ vnet_hw_interface_t *hw;
clib_error_t *err = 0;
+ hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
+
if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
return VNET_API_ERROR_INVALID_SW_IF_INDEX;