Soul Submissive

This story is about a bug generated by g++ and clang compilers (at least)
The condition_variables is a feature on the standard library of c++ (libstdc++), when its compiled statically a weird asm code is generated.


Any example on the link below will crash if its compiled statically:
 https://en.cppreference.com/w/cpp/thread/condition_variable

In this case the condition_variable.wait() crashed, but this happens with other methods, a simple way to trigger it:




If this program is compiled dynamically the crash doesn't occur:

Looking the dissasembly there is a surprise created by the compiler:


Compilers:
    g++  9.2.1+20200130-2
    clang++ v9

Both compilers are generating the "call 0x00"

If we check this call in a dynamic compiled:




The implementation of condition_variable in github:
https://github.com/gcc-mirror/gcc/blob/b7c9bd36eaacac42631b882dc67a6f0db94de21c/libstdc%2B%2B-v3/include/std/condition_variable


The compilers can't copile well this code in static,  and same happens on  other condition_variable methods.
I would say the _lock is being assembled improperly in static, is not exacly a null pointer derreference but the effects are the same, executing code at address 0x00 which on linux is a crash on most of cases.

Related posts

1. Hack App
2. How To Hack
3. Hacking Tools Usb
4. Best Hacking Tools 2019
5. Beginner Hacker Tools
6. Hacker Tools Software
7. Easy Hack Tools
8. Growth Hacker Tools
9. Hacker Tools For Mac
10. How To Hack
11. Hacking Tools Name
12. Termux Hacking Tools 2019
13. Hacking Tools And Software
14. New Hacker Tools
15. Pentest Tools For Windows
16. How To Hack
17. Ethical Hacker Tools
18. Pentest Tools Review
19. Hacker Tools 2020
20. Hacking Tools Pc
21. Hack And Tools
22. Hacking Tools Windows 10
23. Hacking Tools Usb
24. Pentest Tools Framework
25. Blackhat Hacker Tools
26. Hacking Tools For Kali Linux
27. Hacker Tools Windows
28. Pentest Tools Online
29. Best Pentesting Tools 2018
30. Pentest Tools Nmap
31. Hack Tools For Pc
32. Hacking App
33. Hacking Tools Pc
34. Tools For Hacker
35. Pentest Tools Subdomain
36. Tools 4 Hack
37. What Are Hacking Tools
38. Hacker Hardware Tools
39. Pentest Tools Android
40. What Are Hacking Tools
41. Tools Used For Hacking
42. Hacking Tools 2019
43. Pentest Tools Windows
44. Hacking Tools For Mac
45. Hacker Tools 2020
46. Hacking App
47. Pentest Tools Url Fuzzer
48. Nsa Hack Tools
49. Pentest Tools
50. Hack Tools
51. Hack Apps
52. Hackrf Tools
53. Hacker Tool Kit
54. What Are Hacking Tools
55. Pentest Tools Free
56. What Are Hacking Tools
57. Hack App