On Tuesday, January 3, 2017 10:29:33 AM CET Andy Lutomirski wrote: > > Hmm. What if we approached this a bit differently? We could add a > single new personality bit ADDR_LIMIT_EXPLICIT. Setting this bit > cause PER_LINUX32_3GB etc to be automatically cleared. Both the ADDR_LIMIT_32BIT and ADDR_LIMIT_3GB flags I guess? > When > ADDR_LIMIT_EXPLICIT is in effect, prctl can set a 64-bit numeric > limit. If ADDR_LIMIT_EXPLICIT is cleared, the prctl value stops being > settable and reading it via prctl returns whatever is implied by the > other personality bits. I don't see anything wrong with it, but I'm a bit confused now what this would be good for, compared to using just prctl. Is this about setuid clearing the personality but not the prctl, or something else? Arnd -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>