This is a note to let you know that I've just added the patch titled
md/bitmap: fix memory leak of temporary bitmap
to the 5.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
md-bitmap-fix-memory-leak-of-temporary-bitmap.patch
and it can be found in the queue-5.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4bd2e67aec6596e210a68c5ffd697b75b38275a6
Author: Zhao Heming <heming.zhao@xxxxxxxx>
Date: Sun Sep 27 13:40:13 2020 +0800
md/bitmap: fix memory leak of temporary bitmap
[ Upstream commit 1383b347a8ae4a69c04ae3746e6cb5c8d38e2585 ]
Callers of get_bitmap_from_slot() are responsible to free the bitmap.
Suggested-by: Guoqing Jiang <guoqing.jiang@xxxxxxxxxxxxxxx>
Signed-off-by: Zhao Heming <heming.zhao@xxxxxxxx>
Signed-off-by: Song Liu <songliubraving@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c
index 95a5f3757fa30..19b2601be3c5e 100644
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -1949,6 +1949,7 @@ int md_bitmap_load(struct mddev *mddev)
}
EXPORT_SYMBOL_GPL(md_bitmap_load);
+/* caller need to free returned bitmap with md_bitmap_free() */
struct bitmap *get_bitmap_from_slot(struct mddev *mddev, int slot)
{
int rv = 0;
@@ -2012,6 +2013,7 @@ int md_bitmap_copy_from_slot(struct mddev *mddev, int slot,
md_bitmap_unplug(mddev->bitmap);
*low = lo;
*high = hi;
+ md_bitmap_free(bitmap);
return rv;
}
@@ -2615,4 +2617,3 @@ struct attribute_group md_bitmap_group = {
.name = "bitmap",
.attrs = md_bitmap_attrs,
};
-
diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c
index d50737ec40394..afbbc552c3275 100644
--- a/drivers/md/md-cluster.c
+++ b/drivers/md/md-cluster.c
@@ -1166,6 +1166,7 @@ static int resize_bitmaps(struct mddev *mddev, sector_t newsize, sector_t oldsiz
* can't resize bitmap
*/
goto out;
+ md_bitmap_free(bitmap);
}
return 0;
