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);