In the undo path of start_isolate_page_range(), we need to check the pfn validity before access its page, or it will trigger an addressing exception if there is hole in the zone.
Signed-off-by: Weijie Yang <[email protected]> --- mm/page_isolation.c | 7 +++++-- 1 files changed, 5 insertions(+), 2 deletions(-) diff --git a/mm/page_isolation.c b/mm/page_isolation.c index d1473b2..3ddc8b3 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -137,8 +137,11 @@ int start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, undo: for (pfn = start_pfn; pfn < undo_pfn; - pfn += pageblock_nr_pages) - unset_migratetype_isolate(pfn_to_page(pfn), migratetype); + pfn += pageblock_nr_pages) { + page = __first_valid_page(pfn, pageblock_nr_pages); + if (page) + unset_migratetype_isolate(page, migratetype); + } return -EBUSY; } -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
