advapi32: Fix potential NULL pointer dereference in RegSetValueExA [with test] (Saturn)

[Aurimas Fišeras]

Alexandre Julliard wrote:
> Aurimas Fišeras <aurimas at gmail.com> writes:
> 
> 
>> How to know when to fix NULL pointer dereferences if in most such cases
>> code flow can be traced back to a windows API called by "other program"?
> 
> If some other program is really calling it with NULL then you can fix
> it. You can't preemptively fix every API that takes a pointer.
> 

OK, I won't "fix" any windows API if no program calls it, although I
don't believe that is right.

But what about this and similar situations?

Error report:
server/debugger.c:160 red Possible NULL dereference of exe_module
Intraprocedural Null error

143: struct process_dll *exe_module = get_process_exe_module( process );
...
160: if (exe_module->file &&

process.h:
static inline struct process_dll *get_process_exe_module( struct process
*process )
{
    struct list *ptr = list_head( &process->dlls );
    return ptr ? LIST_ENTRY( ptr, struct process_dll, entry ) : NULL;
}


What should I do?
1. change get_process_exe_module() to
	return LIST_ENTRY( ptr, struct process_dll, entry );
2. change debugger.c:160 to
	if (exe_module && exe_module->file &&
3. inspect list_head()?
4. ignore it?