lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Fri, 1 May 2020 13:05:51 +0900
From:   Masahiro Yamada <>
To:     Alexei Starovoitov <>
Cc:     Alexei Starovoitov <>, bpf <>,
        Networking <>,
        Daniel Borkmann <>,
        Martin KaFai Lau <>,
        Linux Kernel Mailing List <>
Subject: Re: BPFilter: bit size mismatch between bpfiter_umh and vmliux

Hi Alexei,

On Wed, Apr 29, 2020 at 1:14 AM Alexei Starovoitov
<> wrote:
> >
> > At least, the build was successful,
> > but does this work at runtime?
> >
> > If this is a bug, I can fix it cleanly.
> >
> > I think the bit size of the user mode helper
> > should match to the kernel bit size. Is this correct?
> yes. they should match.
> In theory we can have -m32 umh running on 64-bit kernel,
> but I wouldn't bother adding support for such thing
> until there is a use case.
> Running 64-bit umh on 32-bit kernel is no go.

Thanks for the comments.

This issue will be fixed by this:

and the Makefile will be cleaned up by this:

They are parts of the big series of Makefile cleanups.
So, I will apply the whole to kbuild tree.


Best Regards
Masahiro Yamada

Powered by blists - more mailing lists