Hi, On Sun, Apr 04, 2021 at 05:10:25PM -0400, Valdis Klētnieks wrote: > On Sun, 04 Apr 2021 11:48:37 +0200, John Wood said: > > > that exec and the child crashes is mitigated. The only drawback here, as > > point Andi, is that a supervisor respawns some process killed. To avoid > > this situation he suggest to notify to usersapace via wait* that the > > task has been killed by "brute". Then, this supervisor has the chance to > > do what they need (respawn or not). > > And how does the kernel know that it's notifying a "real" supervisor process, > and not a process started by the bad guy, who can receive the notification > and decide to respawn? > Well, I think this is not possible to know. Anyway, I believe that the "bad guy" not rely on the wait* notification to decide to respawn or not. He will do the attack without waiting any notification. Anyway thanks a lot for this new point of view. Thanks, John Wood _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
