File: deep_stack_uaf.cpp

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (35 lines) | stat: -rw-r--r-- 969 bytes parent folder | download | duplicates (19) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
 
// Check that we can store lots of stack frames if asked to.

// RUN: %clangxx_asan -O0 %s -o %t 2>&1
// RUN: %env_asan_opts=malloc_context_size=120:redzone=512 not %run %t 2>&1 | FileCheck %s
// REQUIRES: stable-runtime
#include <stdlib.h>
#include <stdio.h>

template <int depth>
struct DeepFree {
  static void free(char *x) {
    DeepFree<depth - 1>::free(x);
  }
};

template<>
struct DeepFree<0> {
  static void free(char *x) {
    ::free(x);
  }
};

int main() {
  char *x = (char*)malloc(10);
  // deep_free(x);
  DeepFree<200>::free(x);
  return x[5];
  // CHECK: {{.*ERROR: AddressSanitizer: heap-use-after-free on address}}
  // The libcxxrt demangling procedure on FreeBSD 9.2 incorrectly appends
  // extra 'E' characters to the end of template arguments; see:
  // https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192115
  // CHECK: {{DeepFree<36>|DeepFree<36E>}}
  // CHECK: {{DeepFree<98>|DeepFree<98E>}}
  // CHECK: {{DeepFree<115>|DeepFree<115E>}}
}