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md/bitmap: call bitmap_file_unmap once bitmap_storage_alloc returns -ENOMEM

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It is possible that bitmap_storage_alloc could return -ENOMEM,
and some member inside store could be allocated such as filemap.

To avoid memory leak, we need to call bitmap_file_unmap to free
those members in the bitmap_resize.

Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Guoqing Jiang 2016-10-31 10:19:00 +08:00 committed by Shaohua Li
parent 7adb072ca8
commit cbb3873236
1 changed files with 3 additions and 1 deletions
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4
drivers/md/bitmap.c
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@ -2029,8 +2029,10 @@ int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
!bitmap->mddev->bitmap_info.external,
mddev_is_clustered(bitmap->mddev)
? bitmap->cluster_slot : 0);
if (ret)
if (ret) {
bitmap_file_unmap(&store);
goto err;
}
pages = DIV_ROUND_UP(chunks, PAGE_COUNTER_RATIO);