On Fri, 6 Apr 2018, Kees Cook wrote:
> On Fri, Apr 6, 2018 at 9:47 AM, Kees Cook <keesc...@chromium.org> wrote:
> > On Fri, Apr 6, 2018 at 2:47 AM, Sebastian Ott <seb...@linux.vnet.ibm.com>
> > wrote:
> >> Today's kernel oopsed on s390. Bisect points to:
> >> 3c8ba0d61d04 ("kernel.h: Retain constant expression output for
> >> max()/min()")
> >>
> >> [ 1.898277] dasd-eckd 0.0.3304: DASD with 4 KB/block, 21636720 KB total
> >> size, 48 KB/track, compatible disk layout
> >> [ 1.898308] ------------[ cut here ]------------
> >> [ 1.898310] kernel BUG at block/bio.c:1798!
> >
> > Well that's extremely bad. :(
> >
> >> Bisect log and config attached. I'll look at min/max users in the affected
> >> areas later today.
> >
> > Seems like a comparison of objdump output with/without the patch may
> > be needed. And why is this s390 only? Ugh.
>
> I did a objdump diff with your .config and it's rather large -- mostly
> seems to be register swaps, so it's not easy to browse.
Yes, I'm looking at that too.
> BTW, what version of gcc did you use? I built using:
gcc version 7.2.0 (GCC)
