diff --git a/examples/ioat/kperf/kmod/dmaperf.c b/examples/ioat/kperf/kmod/dmaperf.c
index 4892c27e3..430adde00 100644
--- a/examples/ioat/kperf/kmod/dmaperf.c
+++ b/examples/ioat/kperf/kmod/dmaperf.c
@@ -605,7 +605,7 @@ static int perf_debugfs_setup(struct perf_ctx *perf)
 
 	for (i = 0; i < MAX_THREADS; i++) {
 		struct pthr_ctx *pctx = &perf->pthr_ctx[i];
-		sprintf(temp_name, "thread_%d", i);
+		snprintf(temp_name, sizeof(temp_name), "thread_%d", i);
 
 		pctx->debugfs_thr_dir = debugfs_create_dir(temp_name, perf->debugfs_node_dir);
 		if (!pctx->debugfs_thr_dir) {
diff --git a/scripts/check_format.sh b/scripts/check_format.sh
index 2c7badc17..edea664a9 100755
--- a/scripts/check_format.sh
+++ b/scripts/check_format.sh
@@ -77,7 +77,7 @@ rm -f whitespace.log
 
 echo -n "Checking for use of forbidden library functions..."
 
-git grep -w strcpy -- app examples lib test > badfunc.log || true
+git grep -w '\(strcpy\|sprintf\|vsprintf\)' -- app examples lib test > badfunc.log || true
 
 if [ -s badfunc.log ]; then
 	echo " Forbidden library functions detected"