On Thu, Apr 30, 2020 at 6:39 AM Bernd Edlinger
<bernd.edlin...@hotmail.de> wrote:
>
> Excuse me, but what in my /proc folder there is no attr/something
> is there a procfs equivalent of pthread_attach ?
>
> What exactly is "attr/something" ?
Anything that uses that proc_pid_attr_write().
Which you should have realized, since you wrote the patch that changed
that function to return -EAGAIN.
That's
/proc/<pid>/attr/{current,exec,fscreate,keycreate,prev,sockcreate}
and some smack files.
Your patch definitely made them return -EINVAL if they happen in that
execve() black hole, instead of waiting for the execve() to just
complete and then just work.
Dropping a lock really is broken. It';s broken even if you then set a
flag saying "I dropped the lock, now you can't use it".
Linus
