From: Jan Engelhardt <jengelh@inai.de>
Reference: http://bugs.icu-project.org/trac/ticket/7808

build: resolve potential buffer overflow in icu

I: Statement might be overflowing a buffer in strncat. Common mistake:
   BAD: strncat(buffer,charptr,sizeof(buffer)) is wrong, it takes the left over size as 3rd argument
   GOOD: strncat(buffer,charptr,sizeof(buffer)-strlen(buffer)-1)
E: icu bufferoverflowstrncat pkgdata.cpp:299:87

---
 source/tools/pkgdata/pkgdata.cpp |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Index: icu/source/tools/pkgdata/pkgdata.cpp
===================================================================
--- icu.orig/source/tools/pkgdata/pkgdata.cpp
+++ icu/source/tools/pkgdata/pkgdata.cpp
@@ -1914,12 +1914,12 @@ static void loadLists(UPKGOptions *o, UE
     const char cmd[] = "icu-config --incpkgdatafile";
 
     /* #1 try the same path where pkgdata was called from. */
-    findDirname(progname, cmdBuf, 1024, &status);
+    findDirname(progname, cmdBuf, sizeof(cmdBuf), &status);
     if(U_SUCCESS(status)) {
       if (cmdBuf[0] != 0) {
-          uprv_strncat(cmdBuf, U_FILE_SEP_STRING, 1024);
+          uprv_strncat(cmdBuf, U_FILE_SEP_STRING, sizeof(cmdBuf)-1-strlen(cmdBuf));
       }
-      uprv_strncat(cmdBuf, cmd, 1024);
+      uprv_strncat(cmdBuf, cmd, sizeof(cmdBuf)-1-strlen(cmdBuf));
       
       if(verbose) {
         fprintf(stdout, "# Calling icu-config: %s\n", cmdBuf);