Files
Liu Shixin 26d6c6ff96 mm/compaction: fix UBSAN shift-out-of-bounds warning
BugLink: https://bugs.launchpad.net/bugs/2114239

commit d1366e74342e75555af2648a2964deb2d5c92200 upstream.

syzkaller reported a UBSAN shift-out-of-bounds warning of (1UL << order)
in isolate_freepages_block().  The bogus compound_order can be any value
because it is union with flags.  Add back the MAX_PAGE_ORDER check to fix
the warning.

Link: https://lkml.kernel.org/r/20250123021029.2826736-1-liushixin2@huawei.com
Fixes: 3da0272a4c ("mm/compaction: correctly return failure with bogus compound_order in strict mode")
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Reviewed-by: Kemeng Shi <shikemeng@huaweicloud.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Nanyong Sun <sunnanyong@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Noah Wager <noah.wager@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
2025-06-15 10:39:36 +03:00
..
2024-11-09 18:45:05 +03:00
2025-01-17 14:44:45 +03:00
2024-08-13 12:12:13 +02:00
2025-03-14 14:30:36 +01:00
2025-04-15 19:58:44 +03:00