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SubjectRe: [PATCH net-next] modules: allow modprobe load regular elf binaries
On 6 Mar 2018, at 11:12, Linus Torvalds wrote:

> On Mon, Mar 5, 2018 at 5:34 PM, Alexei Starovoitov <>
> wrote:
>> As the first step in development of bpfilter project [1] the
>> request_module()
>> code is extended to allow user mode helpers to be invoked. Idea is
>> that
>> user mode helpers are built as part of the kernel build and installed
>> as
>> traditional kernel modules with .ko file extension into distro
>> specified
>> location, such that from a distribution point of view, they are no
>> different
>> than regular kernel modules. Thus, allow request_module() logic to
>> load such
>> user mode helper (umh) modules via:
> [,,]
> I like this, but I have one request: can we make sure that this action
> is visible in the system messages?
> When we load a regular module, at least it shows in lsmod afterwards,
> although I have a few times wanted to really see module load as an
> event in the logs too.
> When we load a module that just executes a user program, and there is
> no sign of it in the module list, I think we *really* need to make
> that event show to the admin some way.
> .. and yes, maybe we'll need to rate-limit the messages, and maybe it
> turns out that I'm entirely wrong and people will hate the messages
> after they get used to the concept of these pseudo-modules, but
> particularly for the early implementation when this is a new thing, I
> really want a message like
> executed user process xyz-abc as a pseudo-module
> or something in dmesg.
> I do *not* want this to be a magical way to hide things.

Especially early on, this makes a lot of sense. But I wanted to plug
bps and the hopefully growing set of bpf introspection tools:

Long term these are probably a good place to tell the admin what's going


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