On Thu, 2017-11-09 at 17:27:36 UTC, Nicholas Piggin wrote: > When allocating VA space with a hint that crosses 128TB, the SLB addr_limit > variable is not expanded if addr is not > 128TB, but the slice allocation > looks at task_size, which is 512TB. This results in slice_check_fit() > incorrectly succeeding because the slice_count truncates off bit 128 of the > requested mask, so the comparison to the available mask succeeds. > > Fix this by using mm->context.addr_limit instead of mm->task_size for > testing allocation limits. This causes such allocations to fail. > > Cc: "Aneesh Kumar K.V" <[email protected]> > Fixes: f4ea6dcb08 ("powerpc/mm: Enable mappings above 128TB") > Reported-by: Florian Weimer <[email protected]> > Signed-off-by: Nicholas Piggin <[email protected]> > Reviewed-by: Aneesh Kumar K.V <[email protected]>
Series applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/6a72dc038b615229a1b285829d6c83 cheers
