diff --git a/scd/app-dinsig.c b/scd/app-dinsig.c
index 5d6584520..f7ecc4bd2 100644
--- a/scd/app-dinsig.c
+++ b/scd/app-dinsig.c
@@ -456,7 +456,6 @@ do_sign (app_t app, const char *keyidstr, int hashalgo,
           /* Fixme: This is a kludge.  A better solution is not to use
              SHA1 as default but use an autodetection.  However this
              needs changes in all app-*.c */
-          hashalgo = GCRY_MD_SHA256;
           datalen  = indatalen;
         }
       else
diff --git a/scd/app-p15.c b/scd/app-p15.c
index db8c38e99..4072fb715 100644
--- a/scd/app-p15.c
+++ b/scd/app-p15.c
@@ -752,7 +752,6 @@ parse_keyusage_flags (const unsigned char *der, size_t derlen,
       else
         {
           bits &= ~mask;
-          mask = 0;
         }
     }
   else
@@ -1388,7 +1387,7 @@ read_ef_cdf (app_t app, unsigned short fid, cdf_object_t *result)
       if (class != CLASS_UNIVERSAL || tag != TAG_SEQUENCE)
         {
           errstr = "unsupported reference type";
-          continue;
+          goto parse_error;
         }
       nn = objlen;
 
@@ -1801,7 +1800,6 @@ read_ef_aodf (app_t app, unsigned short fid, aodf_object_t *result)
             else
               {
                 bits &= ~mask;
-                mask = 0;
               }
           }
         if ((bits & 0x80))
diff --git a/scd/app-sc-hsm.c b/scd/app-sc-hsm.c
index c5827345c..dddc8dcfe 100644
--- a/scd/app-sc-hsm.c
+++ b/scd/app-sc-hsm.c
@@ -414,7 +414,6 @@ parse_keyusage_flags (const unsigned char *der, size_t derlen,
       else
         {
           bits &= ~mask;
-          mask = 0;
         }
     }
   else
@@ -827,7 +826,6 @@ read_ef_prkd (app_t app, unsigned short fid, prkdf_object_t *prkdresult,
   if (prkdf->usageflags.non_repudiation)
     {
       log_printf ("%snon_repudiation", s);
-      s = ",";
     }
   log_printf ("\n");
 
@@ -891,7 +889,8 @@ read_ef_prkd (app_t app, unsigned short fid, prkdf_object_t *prkdresult,
     }
   else
     {
-      prkdf->next = *prkdresult;
+      if (prkdf)
+        prkdf->next = *prkdresult;
       *prkdresult = prkdf;
       if (cdf)
         {
@@ -1112,7 +1111,8 @@ read_ef_cd (app_t app, unsigned short fid, cdf_object_t *result)
     }
   else
     {
-      cdf->next = *result;
+      if (cdf)
+        cdf->next = *result;
       *result = cdf;
     }
   return err;