Doubt on memmory deallocation

[vaysagekv]

Hi,
I am allocating some memory like below:
char* result= malloc(len);

then I assign another variable like below
char* temp = result+2;

If i deallocate temp
free(temp);
Does it deallocate whole space pointed by result.

Thanks
vaysage

 

[Ben Pfaff]

I am allocating some memory like below:
char* result= malloc(len);

then I assign another variable like below
char* temp = result+2;

If i deallocate temp
free(temp);
Does it deallocate whole space pointed by result.

No. It yields undefined behavior. Only addresses returned my
malloc() (and a few other allocation functions) may be passed to
free().

 

[vaysagekv]

No. It yields undefined behavior. Only addresses returned my
malloc() (and a few other allocation functions) may be passed to
free().

Thank a lot.

 

[vaysagekv]

No.

It will probably crash.

(result+2) is not a value which was returned by malloc.

Thank you