On Wed, Nov 30, 2016 at 12:37:53PM -0800, Andy Lutomirski wrote: > This is a backport of: > commit cb32c69920e58a1a58e7b5cad975038a69c0ce7d upstream > > On the 80486 DX, it seems that some exceptions may leave garbage in > the high bits of CS. This causes sporadic failures in which > early_fixup_exception() refuses to fix up an exception. > > As far as I can tell, this has been buggy for a long time, but the > problem seems to have been exacerbated by commit 1e02ce4cccdc ("x86: > Store a per-cpu shadow copy of CR4") and commit e1bfc11c5a6f > ("x86/init: Fix cr4_init_shadow() on CR4-less machines"). > > This appears to have broken for as long as we've had early > exception handling. > > [ This backport should apply to kernels from 3.4 - 4.5. ] This morning before coffee took effect I read 3.4-3.5 so I classed it, now I've queued it for 3.10. Thanks Andy! Willy -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html