On Thu, Jan 25, 2018 at 03:47:32PM +0100, Jiri Slaby wrote: > On 01/25/2018, 03:30 PM, Thomas Gleixner wrote: > > So what's the problem? > > The problem I see is that every stable kernel now requires updated > strace with their commit from yesterday to build correctly. In > particular, the new stable kernels cause rpm build failures of strace in > all our distros (based on those stable kernels). Sure, we can patch > strace in every distro every nth kernel update, but it's mere > impractical. Kernel should not break userspace, right? Well, when userspace is doing something stupid... :) > BTW why was the patch applied to stable? We actually do pass > -fno-strict-overflow. The same reason it was applied upstream, it fixes a reported issue. Does that mean that all UBSAN overflow error reports are not valid because of how we build the kernel? thanks, greg k-h