Re: compiler.h:417:38: error: call to '__compiletime_assert_59' declared with attribute error: BUILD_BUG_ON failed: sizeof(_i) > sizeof(long)

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Mon, Jun 14, 2021 at 11:54:40AM +0530, Naresh Kamboju wrote:
> On Mon, 14 Jun 2021 at 10:48, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > On Mon, Jun 14, 2021 at 10:24:23AM +0530, Naresh Kamboju wrote:
> > > On Sun, 13 Jun 2021 at 20:35, Greg Kroah-Hartman
> > > <gregkh@linuxfoundation.org> wrote:
> > > >
> > > > On Sun, Jun 13, 2021 at 08:25:19PM +0530, Naresh Kamboju wrote:
> > > > > The following error was noticed on stable-rc 5.12, 5.10, 5.4, 4.19,
> > > > > 4.14, 4.9 and 4.4
> > > > > for i386 and arm.
> > > > >
> > > > > make --silent --keep-going --jobs=8
> > > > > O=/home/tuxbuild/.cache/tuxmake/builds/current ARCH=arm
> > > > > CROSS_COMPILE=arm-linux-gnueabihf- 'CC=sccache
> > > > > arm-linux-gnueabihf-gcc' 'HOSTCC=sccache gcc'
> > > > > In file included from /builds/linux/include/linux/kernel.h:11,
> > > > >                  from /builds/linux/include/linux/list.h:9,
> > > > >                  from /builds/linux/include/linux/preempt.h:11,
> > > > >                  from /builds/linux/include/linux/hardirq.h:5,
> > > > >                  from /builds/linux/include/linux/kvm_host.h:7,
> > > > >                  from
> > > > > /builds/linux/arch/arm/kvm/../../../virt/kvm/kvm_main.c:18:
> > > > > In function '__gfn_to_hva_memslot',
> > > > >     inlined from '__gfn_to_hva_many.part.6' at
> > > > > /builds/linux/arch/arm/kvm/../../../virt/kvm/kvm_main.c:1446:9,
> > > > >     inlined from '__gfn_to_hva_many' at
> > > > > /builds/linux/arch/arm/kvm/../../../virt/kvm/kvm_main.c:1434:22:
> > > > > /builds/linux/include/linux/compiler.h:417:38: error: call to
> > > > > '__compiletime_assert_59' declared with attribute error: BUILD_BUG_ON
> > > > > failed: sizeof(_i) > sizeof(long)
> > > > >   _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> > > > >                                       ^
> > > > > Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
> > > > >
> > > > > ref:
> > > > > https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc/-/jobs/1342604370#L389
> > > >
> > > > Odd.  Does Linus's tree have this problem?
> > > >
> > > > The only arm changes was in arch/arm/include/asm/cpuidle.h in the tree
> > > > right now.  There are some kvm changes, but they are tiny...
> > > >
> > > > Can you bisect this?
> > >
> > > The bisect script pointing to,
> > >
> > > commit 1aa1b47db53e0a66899d63103b3ac1d7f54816bc
> > > Author: Paolo Bonzini <pbonzini@redhat.com>
> > > Date:   Tue Jun 8 15:31:42 2021 -0400
> > >     kvm: avoid speculation-based attacks from out-of-range memslot accesses
> > >
> > >     commit da27a83fd6cc7780fea190e1f5c19e87019da65c upstream.
> >
> > Ah, so is Linus's tree also broken the same way?
> 
> No.
> Linus's tree builds successfully.

Odd.  Paolo, did your above commit da27a83fd6cc ("kvm: avoid
speculation-based attacks from out-of-range memslot accesses"), require
any other changes to get arm32 systems to build properly?

thanks,

greg k-h