From: Klement Sekera <ksekera@cisco.com>
Date: Tue, 16 Nov 2021 11:32:59 +0000 (+0100)
Subject: perfmon: fix coverity warning
X-Git-Tag: v22.06-rc0~243
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=cbc81eae6ef62ea14bce06e8bdc2017139882e8b;p=vpp.git

perfmon: fix coverity warning

Check for possible hash lookup failure to avoid NULL dereference.

Type: fix
Fixes: e15c999c30
Signed-off-by: Klement Sekera <ksekera@cisco.com>
Change-Id: Ib806b4d124be26fbccf36fe9d19af1aec63f487b
---

diff --git a/src/plugins/perfmon/intel/bundle/iio_bw.c b/src/plugins/perfmon/intel/bundle/iio_bw.c
index 9aaca42233f..66c550ff9c2 100644
--- a/src/plugins/perfmon/intel/bundle/iio_bw.c
+++ b/src/plugins/perfmon/intel/bundle/iio_bw.c
@@ -126,9 +126,16 @@ format_stack_socket (u8 *s, va_list *va)
     }
 
   uword *pu = hash_get (h, root_bus.bus);
-  e = pool_elt_at_index (p, (index_t) pu[0]);
+  if (pu)
+    {
+      e = pool_elt_at_index (p, (index_t) pu[0]);
 
-  s = format (s, "IIO%u/%u", e->socket_id, e->iio_unit_id);
+      s = format (s, "IIO%u/%u", e->socket_id, e->iio_unit_id);
+    }
+  else
+    {
+      s = format (s, "[ERR: hash lookup for bus '%u' failed]", root_bus.bus);
+    }
   return s;
 }