Messages in this thread | | | Date | Thu, 13 Feb 2014 15:10:14 +0000 (UTC) | From | Mathieu Desnoyers <> | Subject | Re: [RFC PATCH] Fix: module signature vs tracepoints: add new TAINT_UNSIGNED_MODULE |
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----- Original Message ----- > From: "Steven Rostedt" <rostedt@goodmis.org> > To: "Ingo Molnar" <mingo@kernel.org> > Cc: "Mathieu Desnoyers" <mathieu.desnoyers@efficios.com>, linux-kernel@vger.kernel.org, "Ingo Molnar" > <mingo@redhat.com>, "Thomas Gleixner" <tglx@linutronix.de>, "Rusty Russell" <rusty@rustcorp.com.au>, "David Howells" > <dhowells@redhat.com>, "Greg Kroah-Hartman" <gregkh@linuxfoundation.org> > Sent: Tuesday, February 11, 2014 11:45:34 PM > Subject: Re: [RFC PATCH] Fix: module signature vs tracepoints: add new TAINT_UNSIGNED_MODULE > > [...] > But if the kernel expects to have signed modules, and you force a > module to be loaded that is not signed, then you still get that > "forced" module taint, which is the same one as loading a module from > an older kernel into a newer kernel. It's a different problem, and I > can see having a different taint flag be more informative to kernel > developers in general. I would welcome that change with or without > letting tracepoints be set for that module.
There is one important inaccuracy in your explanation above: a kernel supporting signed modules, but not enforcing "sig_force", can load unsigned modules with a simple modprobe or insmod, without any "--force" argument. Therefore, tainting the module as "TAINT_FORCED_MODULE" is misleading.
Thanks,
Mathieu
-- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com
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