Fix a race condition that could cause a crash.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@174148 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/res/snmp/agent.c b/res/snmp/agent.c
index 96398e8a8978b36569beb21e9ae17c3d6d73abd6..08bdd96ece5ccb7ad67b92ce9d1a8e890a4b6173 100644 (file)
--- a/res/snmp/agent.c
+++ b/res/snmp/agent.c
@@ -573,9 +573,9 @@ static u_char *ast_var_channel_types_table(struct variable *vp, oid *name, size_
        case ASTCHANTYPECHANNELS:
                long_ret = 0;
                for (chan = ast_channel_walk_locked(NULL); chan; chan = ast_channel_walk_locked(chan)) {
-                       ast_channel_unlock(chan);
                        if (chan->tech == tech)
                                long_ret++;
+                       ast_channel_unlock(chan);
                }
                return (u_char *)&long_ret;
        default: