On Tue, Jun 18, 2019 at 12:45:02PM -0700, Andrew Morton wrote: > On Tue, 18 Jun 2019 13:43:52 +0100 Colin King <colin.king@xxxxxxxxxxxxx> wrote: > > > From: Colin Ian King <colin.king@xxxxxxxxxxxxx> > > > > Currently the calcuation of end_pfn can round up the pfn number to > > more than the actual maximum number of pfns, causing an Oops. Fix > > this by ensuring end_pfn is never more than max_pfn. > > > > This can be easily triggered when on systems where the end_pfn gets > > rounded up to more than max_pfn using the idle-page stress-ng > > stress test: > > > > cc Vladimir. This seems rather obvious - I'm wondering if the code was > that way for some subtle reason? No subtle reason at all - just a bug. The patch looks good to me, Acked-by: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
