1 files changed, 20 insertions, 0 deletions

diff --git a/lib/string_helpers.c b/lib/string_helpers.c
index 29c490e5d478..3a90a9e2b94a 100644
--- a/lib/string_helpers.c
+++ b/lib/string_helpers.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Helpers for formatting and printing strings
  *
@@ -539,6 +540,25 @@ int string_escape_mem(const char *src, size_t isz, char *dst, size_t osz,
 }
 EXPORT_SYMBOL(string_escape_mem);
 
+int string_escape_mem_ascii(const char *src, size_t isz, char *dst,
+                                        size_t osz)
+{
+        char *p = dst;
+        char *end = p + osz;
+
+        while (isz--) {
+                unsigned char c = *src++;
+
+                if (!isprint(c) || !isascii(c) || c == '"' || c == '\\')
+                        escape_hex(c, &p, end);
+                else
+                        escape_passthrough(c, &p, end);
+        }
+
+        return p - dst;
+}
+EXPORT_SYMBOL(string_escape_mem_ascii);
+
 /*
  * Return an allocated string that has been escaped of special characters
  * and double quotes, making it safe to log in quotes.