Re: [GIT PULL] Please pull proc and exec work for 5.7-rc1

Oleg Nesterov
2020-04-11T18:21:30Z

Eric, Linus, et al,

by various reasons I have not been reading emails for last weeks,
I'll try to read this thread tomorrow, currently I am a bit lost.

On 04/09, Linus Torvalds wrote:
>
> (1) have execve() not wait for dead threads while holding the cred
> mutex

This is what I tried to do 3 years ago, see

[PATCH 1/2] exec: don't wait for zombie threads with cred_guard_mutex held
https://lore.kernel.org/lkml/20170213141516.GA30233@redhat.com/

yes, yes, yes, the patch is not pretty.

From your another email:

> /* if the parent is going through a execve(), it's not listening */
> if (parent->signal->group_exit_task)
return false;

Heh ;) see

[PATCH 2/2] ptrace: ensure PTRACE_EVENT_EXIT won't stop if the tracee is killed by exec
https://lore.kernel.org/lkml/20170213141519.GA30239@redhat.com/

from the same thread.

But this change is more problematic.

Oleg.