On Fri, 27 Jul 2018 15:40:32 +0200 Jann Horn <jannh@xxxxxxxxxx> wrote: > > > But the code doesn't go to dmesg. It's only available > > > via /sys/kernel/debug/tracing/printk_formats which is only available > > > via root. Nobody else has access to that directory. > > > > > > -- Steve > > > > I think the point was that when we take capabilities into account the root > > privileges aren't unequivocal anymore. The 'root' owned process with only > > 'CAP_SYSLOG' shouldn't have access to /sys/kernel/debug/tracing/printk_formats > > Then they shouldn't have access to debugfs at all, right? That's what I'm thinking. -- Steve
