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| author | Liu Shixin <liushixin2@huawei.com> | 2025-01-23 10:10:29 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-17 10:05:36 +0100 |
| commit | 4491159774d973a9e2e998d25d8fbb20fada6dfa (patch) | |
| tree | df9bff6c99030f4ea368cd922c92b4cf3cf56359 /scripts/objdiff | |
| parent | ac304fa978460a0e52457f6356efb904d7510ba8 (diff) | |
| download | linux-4491159774d973a9e2e998d25d8fbb20fada6dfa.tar.gz linux-4491159774d973a9e2e998d25d8fbb20fada6dfa.tar.bz2 linux-4491159774d973a9e2e998d25d8fbb20fada6dfa.zip | |
mm/compaction: fix UBSAN shift-out-of-bounds warning
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: 3da0272a4c7d ("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>
Diffstat (limited to 'scripts/objdiff')
0 files changed, 0 insertions, 0 deletions