Messages in this thread | | | Date | Fri, 27 Jul 2018 09:47:30 -0400 | From | Steven Rostedt <> | Subject | Re: [PATCH] tracing: do not leak kernel addresses |
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On Fri, 27 Jul 2018 15:40:32 +0200 Jann Horn <jannh@google.com> 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
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