From: Bruce Lee <straightblast426@gmail.com>
Date: Tue, 30 Jul 2019 21:43:14 +0000 (+0100)
Subject: Auth: handle socket read errors in Dovecot authenticator
X-Git-Url: https://git.exim.org/exim.git/commitdiff_plain/2ac2eff3c9914a9c77b03db64b31819f361576b9

Auth: handle socket read errors in Dovecot authenticator

(cherry picked from commit c9f1be94cc304f0343c93b66efa41a747d307fb1)
(cherry picked from commit 4ba26a040b8765dea7134c883d046418a8b053a1)
---

diff --git a/src/src/auths/dovecot.c b/src/src/auths/dovecot.c
index b1dde06af..b1c2c6f85 100644
--- a/src/src/auths/dovecot.c
+++ b/src/src/auths/dovecot.c
@@ -212,8 +212,8 @@ for (;;)
   {
   if (socket_buffer_left == 0)
     {
-    socket_buffer_left = read(fd, sbuffer, sizeof(sbuffer));
-    if (socket_buffer_left == 0) { if (count == 0) return NULL; else break; }
+    if ((socket_buffer_left = read(fd, sbuffer, sizeof(sbuffer))) <= 0)
+      if (count == 0) return NULL; else break;
     p = 0;
     }