Re: [PATCH v2 3/5] exec: Move cleanup of posix timers on exec out of de_thread

[Jann Horn]

On Sun, Mar 8, 2020 at 10:39 PM Eric W. Biederman <ebiederm@xxxxxxxxxxxx> wrote:
> These functions have very little to do with de_thread move them out
> of de_thread an into flush_old_exec proper so it can be more clearly
> seen what flush_old_exec is doing.
>
> Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
> ---
>  fs/exec.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/fs/exec.c b/fs/exec.c
> index ff74b9a74d34..215d86f77b63 100644
> --- a/fs/exec.c
> +++ b/fs/exec.c
> @@ -1189,11 +1189,6 @@ static int de_thread(struct task_struct *tsk)
>         /* we have changed execution domain */
>         tsk->exit_signal = SIGCHLD;
>
> -#ifdef CONFIG_POSIX_TIMERS
> -       exit_itimers(sig);
> -       flush_itimer_signals();
> -#endif
> -
>         BUG_ON(!thread_group_leader(tsk));
>         return 0;
>
> @@ -1277,6 +1272,11 @@ int flush_old_exec(struct linux_binprm * bprm)
>         if (retval)
>                 goto out;
>
> +#ifdef CONFIG_POSIX_TIMERS
> +       exit_itimers(me->signal);
> +       flush_itimer_signals();
> +#endif

nit: exit_itimers() has a comment referring to de_thread, that should
probably be updated