Assembly Crash Course - Level 22 - SegFault

[j3r3mias]

In level 22, if you set a different address from the one sugested by the exercise, sometimes the challenge just hangs until segfault.

POC:

echo -en 'H\xc7\xc0\x00\x00@\x00\xff\xe0' | /challenge/run

Output:

Perform the following:
Jump to the absolute address 0x403000                                                                                                                                                                                                                                                                                                                                                                                           
We will now set the following in preparation for your code:                                                                                                                                                        
Loading your given code at: 0x400092                                                                                                                                                                                                                                                                                                                                                                                            
Please give me your assembly in bytes (up to 0x1000 bytes):                                                                                                                                                      
Executing your code...                                                                                                                                                                                           
---------------- CODE ----------------                                                                                                                                                                           
0x400092:       mov     rax, 0x400000                                                                                                                                                                            
0x400099:       jmp     rax                                                                                                                                                                                      
--------------------------------------                                                                                                                                                                                                                                                                                                                                                                   
Segmentation fault