On Mon, Nov 25, 2019 at 02:44:29PM +0000, Lee Jones wrote: > On Mon, 25 Nov 2019, Sasha Levin wrote: > > > On Fri, Nov 22, 2019 at 10:52:48AM +0000, Lee Jones wrote: > > > From: Hari Vyas <hari.vyas@xxxxxxxxxxxx> > > > > > > [ Upstream commit e4ba15debcfd27f60d43da940a58108783bff2a6 ] > > > > > > The bad_mode() handler is called if we encounter an uunknown exception, > > > with the expectation that the subsequent call to panic() will halt the > > > system. Unfortunately, if the exception calling bad_mode() is taken from > > > EL0, then the call to die() can end up killing the current user task and > > > calling schedule() instead of falling through to panic(). > > > > > > Remove the die() call altogether, since we really want to bring down the > > > machine in this "impossible" case. > > > > Should this be in newer LTS kernels too? I don't see it in 4.14. We > > can't take anything into older kernels if it's not in newer ones - we > > don't want to break users who update their kernels. > > Only; 3.18, 4.4, 4.9 and 5.3 were studied. > > I can look at others if it helps. You have to look at others, we can't have regressions if people move from one LTS to a newer one. thanks, greg k-h
