md: call __md_stop_writes in md_stop

commit 0dd84b319352bb8ba64752d4e45396d8b13e6018 upstream.

From the link [1], we can see raid1d was running even after the path
raid_dtr -> md_stop -> __md_stop.

Let's stop write first in destructor to align with normal md-raid to
fix the KASAN issue.

[1]. https://lore.kernel.org/linux-raid/CAPhsuW5gc4AakdGNdF8ubpezAuDLFOYUO_sfMZcec6hQFm8nhg@mail.gmail.com/T/#m7f12bf90481c02c6d2da68c64aeed4779b7df74a

Fixes: 48df498daf62 ("md: move bitmap_destroy to the beginning of __md_stop")
Reported-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 4be9b23..c8f2e85 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -6272,6 +6272,7 @@ void md_stop(struct mddev *mddev)
        /* stop the array and free an attached data structures.
         * This is called from dm-raid
         */
+       __md_stop_writes(mddev);
        __md_stop(mddev);
        bioset_exit(&mddev->bio_set);
        bioset_exit(&mddev->sync_set);