prom: fix coverity 277312, 277317

If one attempts to add a pattern with zero length, first time
it will succeed, and the second time it will cause an invalid memcmp call.

Solution: do not allow to add zero-length patterns.

Type: fix
Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>
Change-Id: Ic08e021486153be605a4b12a2fe4422307bf68d2

diff --git a/src/plugins/prom/prom.c b/src/plugins/prom/prom.c
index 6db5020..3e0fa3b 100644 (file)
--- a/src/plugins/prom/prom.c
+++ b/src/plugins/prom/prom.c
@@ -305,6 +305,8 @@ prom_stat_patterns_add (u8 **patterns)
     {
       found = 0;
       len = vec_len (*pattern);
+      if (len == 0)
+       continue;
       vec_foreach (existing, pm->stats_patterns)
        {
          if (vec_len (*existing) != len)