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| author | Li Nan <linan122@huawei.com> | 2023-05-15 21:48:05 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-19 16:20:57 +0200 |
| commit | be1a3ec63a840cc9e59a033acf154f56255699a1 (patch) | |
| tree | 60117e007a39e38b42c9bde75ecb7a6f687d8b6d /drivers/md/md.c | |
| parent | e1379e067b9485e5af03399fe3f0d39bccb023ad (diff) | |
| download | linux-be1a3ec63a840cc9e59a033acf154f56255699a1.tar.gz | |
md/raid10: check slab-out-of-bounds in md_bitmap_get_counter
[ Upstream commit 301867b1c16805aebbc306aafa6ecdc68b73c7e5 ]
If we write a large number to md/bitmap_set_bits, md_bitmap_checkpage()
will return -EINVAL because 'page >= bitmap->pages', but the return value
was not checked immediately in md_bitmap_get_counter() in order to set
*blocks value and slab-out-of-bounds occurs.
Move check of 'page >= bitmap->pages' to md_bitmap_get_counter() and
return directly if true.
Fixes: ef4256733506 ("md/bitmap: optimise scanning of empty bitmaps.")
Signed-off-by: Li Nan <linan122@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230515134808.3936750-2-linan666@huaweicloud.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/md/md.c')
0 files changed, 0 insertions, 0 deletions