C++ Std::Condition_Variable Null Pointer Derreference

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.

Read more

1. Hacks And Tools
2. Pentest Tools Url Fuzzer
3. Hacking Tools Download
4. Pentest Tools Url Fuzzer
5. Pentest Tools
6. Bluetooth Hacking Tools Kali
7. Pentest Tools For Windows
8. Hack Tools For Ubuntu
9. Hacking Tools For Mac
10. Hack Tool Apk
11. Computer Hacker
12. Hacking Tools Usb
13. Pentest Tools For Windows
14. Pentest Tools Online
15. Pentest Tools Website
16. Tools For Hacker
17. New Hack Tools
18. Pentest Tools Alternative
19. Hacker Tools Windows
20. Hacker Tools Hardware
21. Hack Tool Apk
22. Hack Tools For Mac
23. Hacker Tools Hardware
24. Hacking Tools Github
25. Top Pentest Tools
26. Pentest Recon Tools
27. Hacker Tools Windows
28. Hack Tool Apk No Root
29. Pentest Tools For Windows
30. Pentest Tools Tcp Port Scanner
31. Black Hat Hacker Tools
32. Hack Tools Pc
33. Hacking Tools Online
34. Hacking Tools Name
35. Hack Tools For Windows
36. Hacker Search Tools
37. Hack Tools For Pc
38. Hacking Tools For Games
39. How To Hack
40. Pentest Tools Download
41. Hacking Tools Mac
42. Hacking Tools Mac
43. Nsa Hacker Tools
44. Hack Tools For Games
45. Usb Pentest Tools
46. Hacker Hardware Tools
47. Hack Tool Apk
48. Nsa Hack Tools Download
49. Hacking Tools Pc
50. Hack Tools Download
51. Hacking Tools Windows
52. Termux Hacking Tools 2019
53. Pentest Tools Framework