File: printf-fortify-4.c

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (22 lines) | stat: -rw-r--r-- 646 bytes parent folder | download | duplicates (32) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
// RUN: %clang -fPIC -shared -O2 -D_FORTIFY_SOURCE=2 -D_DSO %s -o %t.so
// RUN: %clang_asan %s -o %t %t.so
// RUN: not %run %t 2>&1 | FileCheck %s
// REQUIRES: glibc-2.27
#ifdef _DSO
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
__attribute__((noinline)) char foo(const char *format, ...) {
  char *write_buffer = (char *)malloc(1);
  va_list ap;
  va_start(ap, format);
  // CHECK: AddressSanitizer: heap-buffer-overflow
  vsnprintf(write_buffer, 4096, format, ap);
  va_end(ap);
  return write_buffer[0];
}
#else
extern int foo(const char *format, ...);
int main() { return foo("%s_%s", "one", "two"); }
#endif