diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h
index 6fe883fac471..95c6d86ab5e8 100644
--- a/drivers/md/dm-core.h
+++ b/drivers/md/dm-core.h
@@ -106,9 +106,6 @@ struct mapped_device {
 
 	struct block_device *bdev;
 
-	/* zero-length flush that will be cloned and submitted to targets */
-	struct bio flush_bio;
-
 	struct dm_stats stats;
 
 	/* for blk-mq request-based DM support */
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index dddbca63e140..f588a6a83d80 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1420,11 +1420,11 @@ static int __send_empty_flush(struct clone_info *ci)
 	struct dm_target *ti;
 
 	/*
-	 * Empty flush uses a statically initialized bio, &md->flush_bio, as
-	 * the base for cloning.  However, blkg association requires that a
-	 * bdev is associated with a gendisk, which doesn't happen until the
-	 * bdev is opened.  So, blkg association is done at issue time of the
-	 * flush rather than when the device is created in alloc_dev().
+	 * Empty flush uses a statically initialized bio, as the base for
+	 * cloning.  However, blkg association requires that a bdev is
+	 * associated with a gendisk, which doesn't happen until the bdev is
+	 * opened.  So, blkg association is done at issue time of the flush
+	 * rather than when the device is created in alloc_dev().
 	 */
 	bio_set_dev(ci->bio, ci->io->md->bdev);
 
@@ -1609,7 +1609,16 @@ static blk_qc_t __split_and_process_bio(struct mapped_device *md,
 	init_clone_info(&ci, md, map, bio);
 
 	if (bio->bi_opf & REQ_PREFLUSH) {
-		ci.bio = &ci.io->md->flush_bio;
+		struct bio flush_bio;
+
+		/*
+		 * Use an on-stack bio for this, it's safe since we don't
+		 * need to reference it after submit. It's just used as
+		 * the basis for the clone(s).
+		 */
+		bio_init(&flush_bio, NULL, 0);
+		flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_SYNC;
+		ci.bio = &flush_bio;
 		ci.sector_count = 0;
 		error = __send_empty_flush(&ci);
 		/* dec_pending submits any data associated with flush */
@@ -1665,7 +1674,16 @@ static blk_qc_t __process_bio(struct mapped_device *md,
 	init_clone_info(&ci, md, map, bio);
 
 	if (bio->bi_opf & REQ_PREFLUSH) {
-		ci.bio = &ci.io->md->flush_bio;
+		struct bio flush_bio;
+
+		/*
+		 * Use an on-stack bio for this, it's safe since we don't
+		 * need to reference it after submit. It's just used as
+		 * the basis for the clone(s).
+		 */
+		bio_init(&flush_bio, NULL, 0);
+		flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_SYNC;
+		ci.bio = &flush_bio;
 		ci.sector_count = 0;
 		error = __send_empty_flush(&ci);
 		/* dec_pending submits any data associated with flush */
@@ -1949,9 +1967,6 @@ static struct mapped_device *alloc_dev(int minor)
 	if (!md->bdev)
 		goto bad;
 
-	bio_init(&md->flush_bio, NULL, 0);
-	md->flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_SYNC;
-
 	dm_stats_init(&md->stats);
 
 	/* Populate the mapping, nobody knows we exist yet */