From 23dc2064579edda7b40daceae598ed90918caf97 Mon Sep 17 00:00:00 2001
From: Aditya kumar <134756409+Adityacode-hub@users.noreply.github.com>
Date: Fri, 7 Nov 2025 05:12:01 +0000
Subject: [PATCH] =?UTF-8?q?MDEV-23893:=20Apply=20Sergei=E2=80=99s=20patch?=
 =?UTF-8?q?=20to=20validate=20numeric=20suffix=20parsing?=
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---
 mysys/my_getopt.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/mysys/my_getopt.c b/mysys/my_getopt.c
index ada7f883b0152..45714fa8bc375 100644
--- a/mysys/my_getopt.c
+++ b/mysys/my_getopt.c
@@ -977,6 +977,13 @@ my_bool getopt_compare_strings(register const char *s, register const char *t,
 
 static inline ulonglong eval_num_suffix(char *suffix, int *error)
 {
+    /* Sergei’s patch for MDEV-23893:
+     Reject suffixes longer than one character, like “ab”, “hjh”, etc. */
+   if (suffix[0] && suffix[1])
+  {
+    *error = 1;
+    return 0ULL;
+  }
   switch (*suffix) {
   case '\0':
     return 1ULL;
@@ -1022,7 +1029,7 @@ static longlong eval_num_suffix_ll(char *argument,
   *error= 0;
   errno= 0;
   num= strtoll(argument, &endchar, 10);
-  if (errno == ERANGE)
+  if (errno == ERANGE||argument==endchar)
   {
     my_getopt_error_reporter(ERROR_LEVEL,
                              "Integer value out of range for int64: '%s'", argument);