Re: [PATCH] pidfd: getfd should always report ESRCH if a task is exiting

On Tue, Feb 06, 2024 at 07:06:07PM +0100, Oleg Nesterov wrote:

Or we can check task->files != NULL rather than PF_EXITING.

To me this looks even better, but looks more confusing without a comment.
OTOH, imo this needs a comment anyway ;)

I thought about this, but I didn't really understand the null check in
exit_files(); if it can really be called more than once, are there
other cases where task->files == NULL that we really should report
EBADF?

Tycho