From: Jeremy Harris <jgh146exb@wizmail.org>
Date: Sat, 7 Apr 2018 21:44:39 +0000 (+0100)
Subject: ARC: fix verify to not evaluate the top AMS twice
X-Git-Tag: exim-4_91_RC4^0
X-Git-Url: https://git.exim.org/exim.git/commitdiff_plain/3c676fa8fedeee3b6e775c9d81c9fc79e8d65e7f?ds=inline

ARC: fix verify to not evaluate the top AMS twice
---

diff --git a/src/src/arc.c b/src/src/arc.c
index dedf64c44..39c081193 100644
--- a/src/src/arc.c
+++ b/src/src/arc.c
@@ -760,7 +760,6 @@ arc_headers_check(arc_ctx * ctx)
 arc_set * as;
 int inst;
 BOOL ams_fail_found = FALSE;
-uschar * ret = NULL;
 
 if (!(as = ctx->arcset_chain))
   return US"none";
@@ -792,20 +791,20 @@ for(inst = 0; as; as = as->next)
 
 arc_received = ctx->arcset_chain_last;
 arc_received_instance = inst;
-if (ret)
-  return ret;
 
 /* We can skip the latest-AMS validation, if we already did it. */
 
 as = ctx->arcset_chain_last;
-if (as->ams_verify_done && !as->ams_verify_passed)
+if (!as->ams_verify_passed)
   {
-  arc_state_reason = as->ams_verify_done;
-  return US"fail";
+  if (as->ams_verify_done)
+    {
+    arc_state_reason = as->ams_verify_done;
+    return US"fail";
+    }
+  if (!!arc_ams_verify(ctx, as))
+    return US"fail";
   }
-if (!!arc_ams_verify(ctx, as))
-  return US"fail";
-
 return NULL;
 }