From: Greg Hudson <ghudson@mit.edu>
Date: Fri, 25 Jan 2013 18:11:27 +0000 (-0500)
Subject: Check for negative poll timeout in k5_sendto_kdc
X-Git-Tag: krb5-1.10.4-final~7
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4fcd8cea7ee1594c25b9e7eec42ae3ce6775d93a;p=thirdparty%2Fkrb5.git

Check for negative poll timeout in k5_sendto_kdc

(cherry picked from commit 74bee54227deb64a41c2e79f57dd2a2c5ea010a3)

ticket: 7578 (new)
version_fixed: 1.10.4
status: resolved
---

diff --git a/src/lib/krb5/os/sendto_kdc.c b/src/lib/krb5/os/sendto_kdc.c
index 63dbcd8f41..7ee5951301 100644
--- a/src/lib/krb5/os/sendto_kdc.c
+++ b/src/lib/krb5/os/sendto_kdc.c
@@ -523,6 +523,10 @@ cm_select_or_poll(const struct select_state *in, struct select_state *out,
             return e;
         timeout = (in->end_time.tv_sec - now.tv_sec) * 1000 +
             (in->end_time.tv_usec - now.tv_usec) / 1000;
+        if (timeout < 0) {
+            *sret = 0;
+            return 0;
+        }
     }
     /* We don't need a separate copy of the selstate for poll, but use one
      * anyone for consistency with the select wrapper. */