From: Greg KH <greg@kroah.com>
To: Sohaib Mhmd <xunilams@gmail.com>
Cc: kernelnewbies@kernelnewbies.org
Subject: Re: Invoke Firefox from kernel space
Date: Fri, 23 Oct 2020 06:38:58 +0200 [thread overview]
Message-ID: <20201023043858.GA21788@kroah.com> (raw)
In-Reply-To: <CAL06vpHQXuO_9LWz5t0bJ00eJhBheCSTq7B-QkgfKzE8soeZrw@mail.gmail.com>
On Fri, Oct 23, 2020 at 01:35:53AM +0200, Sohaib Mhmd wrote:
> Hello,
>
> I tried to use: call_usermodehelper
> It worked fine with
> <https://github.com/smalinux/Kernel-hacking-101/blob/master/invoke-userlevel-app.c>
> /sbin/shutdown and /bin/touch
> but with /bin/firefox i got kernel oops:
> Any clarification, thanks
>
> [ 2258.760627] invoke_userlevel_app: module verification failed: signature
> > and/or required key missing - tainting kernel
> > [ 2258.918529] do_init_module: 'invoke_userlevel_app'->init suspiciously
> > returned 256, it should follow 0/-E convention
> > do_init_module: loading module anyway...
The kernel module you wrote is not handling errors properly, why ignore
the kernel's messages here?
And how can the kernel invoke a graphical program? Please look up how
these types of programs work to see that the kernel can not directly
call them, sorry.
good luck!
greg k-h
_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
prev parent reply other threads:[~2020-10-23 4:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-22 23:35 Invoke Firefox from kernel space Sohaib Mhmd
2020-10-23 4:38 ` Greg KH [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201023043858.GA21788@kroah.com \
--to=greg@kroah.com \
--cc=kernelnewbies@kernelnewbies.org \
--cc=xunilams@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).