[Bug 1445045] New: modprobe -f doesn't work if version magic differs

https://bugzilla.redhat.com/show_bug.cgi?id=1445045

            Bug ID: 1445045
           Summary: modprobe -f doesn't work if version magic differs
           Product: Fedora
           Version: rawhide
         Component: kmod
          Assignee: kmod-maint(a)lists.fedoraproject.org
          Reporter: jskarvad(a)redhat.com
        QA Contact: extras-qa(a)fedoraproject.org
                CC: jonathan(a)jonmasters.org,
                    kmod-maint(a)lists.fedoraproject.org,
                    skozina(a)redhat.com, ykaliuta(a)redhat.com



Description of problem:
modprobe -f doesn't ignore version magic

Version-Release number of selected component (if applicable):
kmod-23-1.fc25.x86_64

How reproducible:
Always

Steps to Reproduce:
1. have running kernel with version magic '4.10.10-200.fc25.x86_64 SMP
mod_unload '
2. recompile kernel without explicit KERNELRELEASE to have version magic
'4.10.12 SMP mod_unload '
3. setenforce 0 # due to bug 1427896
3. modprobe it913x
4. dmesg | tail -1
5. modprobe -f it913x

Actual results:
modprobe: ERROR: could not insert 'it913x': Exec format error
[39896.356652] it913x: version magic '4.10.12 SMP mod_unload ' should be
'4.10.10-200.fc25.x86_64 SMP mod_unload '
modprobe: ERROR: could not insert 'it913x': Exec format error

Expected results:
No error for the 5. (i.e. modprobe -f)

Additional info:
It works OK if recompiled with KERNELRELEASE=4.10.10-200.fc25.x86_64

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.

[Bug 1445045] modprobe -f doesn't work if version magic differs

https://bugzilla.redhat.com/show_bug.cgi?id=1445045



--- Comment #1 from Yauheni Kaliuta <ykaliuta(a)redhat.com&gt; ---
# grep CONFIG_MODULE_FORCE_LOAD  /boot/config-4.10.11-200.fc25.x86_64
# CONFIG_MODULE_FORCE_LOAD is not set

It's a kernel config issue.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.

[Bug 1445045] modprobe -f doesn't work if version magic differs

https://bugzilla.redhat.com/show_bug.cgi?id=1445045

Josh Boyer <jwboyer(a)redhat.com&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gansalmon(a)Gmail.com,
                   |                            |ichavero(a)redhat.com,
                   |                            |itamar(a)ispbrasil.com.br,
                   |                            |kernel-maint(a)redhat.com,
                   |                            |madhu.chinakonda(a)gmail.com,
                   |                            |mchehab(a)infradead.org
          Component|kmod                        |kernel
           Assignee|kmod-maint(a)lists.fedoraproj |kernel-maint(a)redhat.com
                   |ect.org                     |



--- Comment #2 from Josh Boyer <jwboyer(a)redhat.com&gt; ---
Reassigning.

I'll leave it for the kernel team to comment on whether they feel allowing
forced modprobe is safe or not.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.

[Bug 1445045] modprobe -f doesn't work if version magic differs

https://bugzilla.redhat.com/show_bug.cgi?id=1445045

Justin M. Forbes <jforbes(a)redhat.com&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |CLOSED
                 CC|                            |jforbes(a)redhat.com
         Resolution|---                         |WONTFIX
        Last Closed|                            |2017-04-26 10:53:47



--- Comment #3 from Justin M. Forbes <jforbes(a)redhat.com&gt; ---
It is a feature, not an issue.  The kernel team does not support forced
modules.

-- 
You are receiving this mail because:
You are on the CC list for the bug.