--- libnet.orig/src/libnet_pblock.c

+++ libnet/src/libnet_pblock.c

@@ -339,7 +339,7 @@ libnet_pblock_coalesce(libnet_t *l, u_int8_t **packet, u_int32_t *size)

                     snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, 

                     "%s(): packet assembly cannot find a layer 2 header\n",

                     __func__);

-                    return (-1);

+                    goto err;

                 }

                 break;

             case LIBNET_RAW4:

@@ -348,7 +348,7 @@ libnet_pblock_coalesce(libnet_t *l, u_int8_t **packet, u_int32_t *size)

                     snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, 

                     "%s(): packet assembly cannot find an IPv4 header\n",

                      __func__);

-                    return (-1);

+                    goto err;

                 }

                 break;

             case LIBNET_RAW6:

@@ -357,7 +357,7 @@ libnet_pblock_coalesce(libnet_t *l, u_int8_t **packet, u_int32_t *size)

                     snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, 

                     "%s(): packet assembly cannot find an IPv6 header\n",

                      __func__);

-                    return (-1);

+                    goto err;

                 }

                 break;

             default:

@@ -365,7 +365,7 @@ libnet_pblock_coalesce(libnet_t *l, u_int8_t **packet, u_int32_t *size)

                 snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, 

                 "%s(): suddenly the dungeon collapses -- you die\n",

                  __func__);

-                return (-1);

+                goto err;

             break;

         }

     }

@@ -419,6 +419,10 @@ libnet_pblock_coalesce(libnet_t *l, u_int8_t **packet, u_int32_t *size)

         *size -= l->aligner;

     }

     return (1);

+

+err:

+    free(packet);

+    return (-1);

 }

 void