From 7cb935db05e44618c697dac7278d32cd221b47a9 Mon Sep 17 00:00:00 2001
From: Alex <enderice2@users.noreply.github.com>
Date: Sat, 24 Dec 2022 05:50:09 +0200
Subject: [PATCH] Crash on check fail

---
 Library/Convert.c | 44 +++++++++++++++++++++++++++-----------------
 1 file changed, 27 insertions(+), 17 deletions(-)

diff --git a/Library/Convert.c b/Library/Convert.c
index 33b65dc..32814e0 100644
--- a/Library/Convert.c
+++ b/Library/Convert.c
@@ -860,6 +860,16 @@ char *ultoa(unsigned long Value, char *Buffer, int Base)
 
 extern void __chk_fail(void) __attribute__((__noreturn__));
 
+__noreturn static inline void __convert_chk_fail(void)
+{
+#if defined(__amd64__) || defined(__i386__)
+    asmv("int3");
+#else
+#error "Not implemented!"
+#endif
+    __builtin_unreachable();
+}
+
 // #define DBG_CHK 1
 
 __no_stack_protector void *__memcpy_chk(void *dest, const void *src, size_t len, size_t slen)
@@ -870,25 +880,25 @@ __no_stack_protector void *__memcpy_chk(void *dest, const void *src, size_t len,
     if (unlikely(dest == NULL))
     {
         error("dest is NULL");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(src == NULL))
     {
         error("src is NULL");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(len == 0))
     {
         error("len is 0");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(slen == 0))
     {
         error("slen is 0");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(len > slen))
@@ -904,19 +914,19 @@ __no_stack_protector void *__memset_chk(void *dest, int val, size_t len, size_t
     if (unlikely(dest == NULL))
     {
         error("dest is NULL");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(len == 0))
     {
         error("len is 0");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(slen == 0))
     {
         error("slen is 0");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(len > slen))
@@ -932,25 +942,25 @@ __no_stack_protector void *__memmove_chk(void *dest, const void *src, size_t len
     if (unlikely(dest == NULL))
     {
         error("dest is NULL");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(src == NULL))
     {
         error("src is NULL");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(len == 0))
     {
         error("len is 0");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(slen == 0))
     {
         error("slen is 0");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(len > slen))
@@ -966,19 +976,19 @@ __no_stack_protector char *__strcat_chk(char *dest, const char *src, size_t slen
     if (unlikely(dest == NULL))
     {
         error("dest is NULL");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(src == NULL))
     {
         error("src is NULL");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(slen == 0))
     {
         error("slen is 0");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     size_t dest_len = strlen(dest);
@@ -995,19 +1005,19 @@ __no_stack_protector char *__strcpy_chk(char *dest, const char *src, size_t slen
     if (unlikely(dest == NULL))
     {
         error("dest is NULL");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(src == NULL))
     {
         error("src is NULL");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     if (unlikely(slen == 0))
     {
         error("slen is 0");
-        __chk_fail();
+        __convert_chk_fail();
     }
 
     size_t len = strlen(src);