Re: [PATCH] exec: fix up /proc/pid/comm in the execveat(AT_EMPTY_PATH) case

[Linus Torvalds]

On Sat, 30 Nov 2024 at 12:28, Mateusz Guzik <mjguzik@xxxxxxxxx> wrote:
>
> > +             /* The dentry name won't change while we hold the rcu read lock. */
> > +             __set_task_comm(me, smp_load_acquire(&bprm->file->f_path.dentry->d_name.name),
> > +                             true);
>
> This does not sound legit whatsoever as it would indicate all renames
> wait for rcu grace periods to end, which would be prettye weird.

Yes, the "won't change" should be "won't go away from under us".

          Linus