Replace sprintf with snprintf in networking

Backport ibmruntimes/openj9-openjdk-jdk17#406 Signed-off-by: Peter Shipton <Peter_Shipton@ca.ibm.com>
pshipton · Nov 7, 2024 · ea28f6a · ea28f6a
1 parent abd834e
commit ea28f6a
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Showing 3 changed files with 15 additions and 5 deletions.
diff --git a/src/java.base/unix/native/libnet/PlainDatagramSocketImpl.c b/src/java.base/unix/native/libnet/PlainDatagramSocketImpl.c
@@ -22,6 +22,11 @@
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
+/*
+ * ===========================================================================
+ * (c) Copyright IBM Corp. 2024, 2024 All Rights Reserved
+ * ===========================================================================
+ */
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>
@@ -1579,7 +1584,7 @@ jobject getMulticastInterface(JNIEnv *env, jobject this, int fd, jint opt) {
                                                                    index);
             if (ni == NULL) {
                 char errmsg[255];
-                sprintf(errmsg,
+                snprintf(errmsg, sizeof(errmsg),
                         "IPV6_MULTICAST_IF returned index to unrecognized interface: %d",
                         index);
                 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", errmsg);

diff --git a/src/java.base/windows/native/libnet/NetworkInterface_winXP.c b/src/java.base/windows/native/libnet/NetworkInterface_winXP.c
@@ -22,6 +22,11 @@
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
+/*
+ * ===========================================================================
+ * (c) Copyright IBM Corp. 2024, 2024 All Rights Reserved
+ * ===========================================================================
+ */
 #include "net_util.h"
 #include "NetworkInterface.h"
 
@@ -347,10 +352,10 @@ int getAllInterfacesAndAddresses (JNIEnv *env, netif **netifPP)
                             goto err;
                         }
                         if (ptr->IfType == IF_TYPE_TUNNEL) {
-                                sprintf (newname, "tun%d", tun);
+                                snprintf (newname, sizeof(newname), "tun%d", tun);
                                 tun ++;
                         } else {
-                                sprintf (newname, "net%d", net);
+                                snprintf (newname, sizeof(newname), "net%d", net);
                                 net ++;
                         }
                         nif->name = malloc (strlen(newname)+1);

diff --git a/src/java.base/windows/native/libnet/TwoStacksPlainDatagramSocketImpl.c b/src/java.base/windows/native/libnet/TwoStacksPlainDatagramSocketImpl.c
@@ -1864,7 +1864,7 @@ jobject getMulticastInterface(JNIEnv *env, jobject this, int fd, int fd1, jint o
                                                                    index);
             if (ni == NULL) {
                 char errmsg[255];
-                sprintf(errmsg,
+                snprintf(errmsg, sizeof(errmsg),
                         "IPV6_MULTICAST_IF returned index to unrecognized interface: %d",
                         index);
                 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", errmsg);
@@ -1983,7 +1983,7 @@ Java_java_net_TwoStacksPlainDatagramSocketImpl_socketGetOption
         int size = 0;
         char errmsg[255 + 31];
         getErrorString(errno, tmpbuf, sizeof(tmpbuf));
-        sprintf(errmsg, "error getting socket option: %s", tmpbuf);
+        snprintf(errmsg, sizeof(errmsg), "error getting socket option: %s", tmpbuf);
         JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", errmsg);
         return NULL;
     }