From 1383b347a8ae4a69c04ae3746e6cb5c8d38e2585 Mon Sep 17 00:00:00 2001
From: Zhao Heming <heming.zhao@suse.com>
Date: Sun, 27 Sep 2020 13:40:13 +0800
Subject: [PATCH] md/bitmap: fix memory leak of temporary bitmap
Git-commit: 1383b347a8ae4a69c04ae3746e6cb5c8d38e2585
Patch-mainline: v5.10-rc1
References: bsc#1163727
Callers of get_bitmap_from_slot() are responsible to free the bitmap.
Suggested-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Zhao Heming <heming.zhao@suse.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
---
drivers/md/md-bitmap.c | 3 ++-
drivers/md/md-cluster.c | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c
index b3f13105659d..200c5d0f08bf 100644
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -1950,6 +1950,7 @@ 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;
@@ -2013,6 +2014,7 @@ 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;
}
@@ -2616,4 +2618,3 @@ 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 0580b51a156a..4aaf4820b6f6 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;
--
1.8.3.1