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authorSteven Luong <sluong@cisco.com>2019-08-15 14:30:16 -0700
committerDave Barach <openvpp@barachs.net>2019-08-16 19:52:30 +0000
commit5cd987dda679fe50b9cd7a834bb9162db39ade78 (patch)
tree2016a2cf7160b7ffde98f50d13b3625064164f7a
parentecd1fc7dfa6a36d1774f71093380b3548a22346b (diff)
devices: vhost-user crashes displaying show trace for deleted interface
After the trace is collected and if the interface is then deleted, show trace may crash for the debug image. This is due to the additional check in pool_elt_at_index() to make sure that the block is not free. The fix is to do the check in vhost format trace and return "interface deleted" Type: fix Signed-off-by: Steven Luong <sluong@cisco.com> Change-Id: I0744f913ba6146609663443f408d784067880f93
-rw-r--r--src/vnet/devices/virtio/vhost_user_inline.h16
1 files changed, 10 insertions, 6 deletions
diff --git a/src/vnet/devices/virtio/vhost_user_inline.h b/src/vnet/devices/virtio/vhost_user_inline.h
index 27048c66186..8725c969046 100644
--- a/src/vnet/devices/virtio/vhost_user_inline.h
+++ b/src/vnet/devices/virtio/vhost_user_inline.h
@@ -214,13 +214,17 @@ format_vhost_trace (u8 * s, va_list * va)
CLIB_UNUSED (vnet_main_t * vnm) = vnet_get_main ();
vhost_user_main_t *vum = &vhost_user_main;
vhost_trace_t *t = va_arg (*va, vhost_trace_t *);
- vhost_user_intf_t *vui = pool_elt_at_index (vum->vhost_user_interfaces,
- t->device_index);
-
- vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, vui->sw_if_index);
-
- u32 indent = format_get_indent (s);
+ vhost_user_intf_t *vui = vum->vhost_user_interfaces + t->device_index;
+ vnet_sw_interface_t *sw;
+ u32 indent;
+ if (pool_is_free (vum->vhost_user_interfaces, vui))
+ {
+ s = format (s, "vhost-user interface is deleted");
+ return s;
+ }
+ sw = vnet_get_sw_interface (vnm, vui->sw_if_index);
+ indent = format_get_indent (s);
s = format (s, "%U %U queue %d\n", format_white_space, indent,
format_vnet_sw_interface_name, vnm, sw, t->qid);