net/rds: zero last byte for strncpy

for NUL terminated string, need be always sure '\0' in the end.

additional info:
  strncpy will pads with zeroes to the end of the given buffer.
  should initialise every bit of memory that is going to be copied to userland

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/rds/stats.c b/net/rds/stats.c
index 7be790d60b900d30053256b2f6cb1753056b0ba3..73be187d389ed044c886d22e4960905283d9de87 100644 (file)
--- a/net/rds/stats.c
+++ b/net/rds/stats.c
@@ -87,6 +87,7 @@ void rds_stats_info_copy(struct rds_info_iterator *iter,
        for (i = 0; i < nr; i++) {
                BUG_ON(strlen(names[i]) >= sizeof(ctr.name));
                strncpy(ctr.name, names[i], sizeof(ctr.name) - 1);
+               ctr.name[sizeof(ctr.name) - 1] = '\0';
                ctr.value = values[i];
 
                rds_info_copy(iter, &ctr, sizeof(ctr));