The patch titled Subject: mm/balloon_compaction: ignore anonymous pages has been added to the -mm tree. Its filename is mm-balloon_compaction-ignore-anonymous-pages.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/mm-balloon_compaction-ignore-anonymous-pages.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/mm-balloon_compaction-ignore-anonymous-pages.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Konstantin Khlebnikov <k.khlebnikov@xxxxxxxxxxx> Subject: mm/balloon_compaction: ignore anonymous pages Sasha Levin reported KASAN splash inside isolate_migratepages_range(). Problem is in function __is_movable_balloon_page() which tests AS_BALLOON_MAP in page->mapping->flags. This function has no protection against anonymous pages. As result it tried to check address space flags in inside anon-vma. See http://lkml.kernel.org/p/53E6CEAA.9020105@xxxxxxxxxx. Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@xxxxxxxxxxx> Reported-by: Sasha Levin <sasha.levin@xxxxxxxxxx> Acked-by: Rafael Aquini <aquini@xxxxxxxxxx> Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> [v3.8+] Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/balloon_compaction.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN include/linux/balloon_compaction.h~mm-balloon_compaction-ignore-anonymous-pages include/linux/balloon_compaction.h --- a/include/linux/balloon_compaction.h~mm-balloon_compaction-ignore-anonymous-pages +++ a/include/linux/balloon_compaction.h @@ -128,7 +128,7 @@ static inline bool page_flags_cleared(st static inline bool __is_movable_balloon_page(struct page *page) { struct address_space *mapping = page->mapping; - return mapping_balloon(mapping); + return !PageAnon(page) && mapping_balloon(mapping); } /* _ Patches currently in -mm which might be from k.khlebnikov@xxxxxxxxxxx are mm-balloon_compaction-ignore-anonymous-pages.patch mm-balloon_compaction-keep-ballooned-pages-away-from-normal-migration-path.patch mm-balloon_compaction-isolate-balloon-pages-without-lru_lock.patch mm-introduce-common-page-state-for-ballooned-memory.patch mm-balloon_compaction-use-common-page-ballooning.patch mm-balloon_compaction-general-cleanup.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html