Re: [PATCH] s390/netiucv: handle memory allocation failure in conn_action_start()

[Markus Elfring <Markus.Elfring@web.de>]

> This patch handle potential null pointer dereference in
> iucv_path_connect(), When iucv_path_alloc() fails to allocate memory
> for 'rc'.

1. Can a wording approach (like the following) be a better change description?

   A null pointer is stored in the data structure member “path” after a call
   of the function “iucv_path_alloc” failed. This pointer was passed to
   a subsequent call of the function “iucv_path_connect” where an undesirable
   dereference will be performed then.
   Thus add a corresponding return value check.


2. May the proposed error message be omitted
   (because a memory allocation failure might have been reported
   by an other function call already)?


3. Is there a need to adjust the return type of the function “conn_action_start”?


4. Would you like to add any tags (like “Fixes”) accordingly?


5. Under which circumstances will development interests grow for increasing
   the application of scope-based resource management?
   https://elixir.bootlin.com/linux/v6.10-rc4/source/include/linux/cleanup.h#L8


Regards,
Markus