diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 08368247668e..b1b53d713ee9 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1627,6 +1627,10 @@ static int backup_super_roots(struct btrfs_fs_info *info)
 			btrfs_err(info, "missing extent root for extent at bytenr 0");
 			return -EUCLEAN;
 		}
+		if (unlikely(!csum_root)) {
+			btrfs_err(info, "missing csum root for extent at bytenr 0");
+			return -EUCLEAN;
+		}
 
 		btrfs_set_backup_extent_root(root_backup,
 					     extent_root->node->start);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 7fcd83f32014..85ee5c79759d 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1974,8 +1974,15 @@ static int cleanup_ref_head(struct btrfs_trans_handle *trans,
 			struct btrfs_root *csum_root;
 
 			csum_root = btrfs_csum_root(fs_info, head->bytenr);
-			ret = btrfs_del_csums(trans, csum_root, head->bytenr,
-					      head->num_bytes);
+			if (unlikely(!csum_root)) {
+				btrfs_err(fs_info,
+					  "missing csum root for extent at bytenr %llu",
+					  head->bytenr);
+				ret = -EUCLEAN;
+			} else {
+				ret = btrfs_del_csums(trans, csum_root, head->bytenr,
+						      head->num_bytes);
+			}
 		}
 	}
 
@@ -3147,6 +3154,15 @@ static int do_free_extent_accounting(struct btrfs_trans_handle *trans,
 		struct btrfs_root *csum_root;
 
 		csum_root = btrfs_csum_root(trans->fs_info, bytenr);
+		if (unlikely(!csum_root)) {
+			ret = -EUCLEAN;
+			btrfs_abort_transaction(trans, ret);
+			btrfs_err(trans->fs_info,
+				  "missing csum root for extent at bytenr %llu",
+				  bytenr);
+			return ret;
+		}
+
 		ret = btrfs_del_csums(trans, csum_root, bytenr, num_bytes);
 		if (unlikely(ret)) {
 			btrfs_abort_transaction(trans, ret);
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 7bd715442f3e..f585ddfa8440 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -308,6 +308,13 @@ static int search_csum_tree(struct btrfs_fs_info *fs_info,
 	/* Current item doesn't contain the desired range, search again */
 	btrfs_release_path(path);
 	csum_root = btrfs_csum_root(fs_info, disk_bytenr);
+	if (unlikely(!csum_root)) {
+		btrfs_err(fs_info,
+			  "missing csum root for extent at bytenr %llu",
+			  disk_bytenr);
+		return -EUCLEAN;
+	}
+
 	item = btrfs_lookup_csum(NULL, csum_root, path, disk_bytenr, 0);
 	if (IS_ERR(item)) {
 		ret = PTR_ERR(item);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index b409efe1857e..ed4d19780f22 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2012,6 +2012,13 @@ static int can_nocow_file_extent(struct btrfs_path *path,
 	 */
 
 	csum_root = btrfs_csum_root(root->fs_info, io_start);
+	if (unlikely(!csum_root)) {
+		btrfs_err(root->fs_info,
+			  "missing csum root for extent at bytenr %llu", io_start);
+		ret = -EUCLEAN;
+		goto out;
+	}
+
 	ret = btrfs_lookup_csums_list(csum_root, io_start,
 				      io_start + args->file_extent.num_bytes - 1,
 				      NULL, nowait);
@@ -2749,10 +2756,17 @@ static int add_pending_csums(struct btrfs_trans_handle *trans,
 	int ret;
 
 	list_for_each_entry(sum, list, list) {
-		trans->adding_csums = true;
-		if (!csum_root)
+		if (!csum_root) {
 			csum_root = btrfs_csum_root(trans->fs_info,
 						    sum->logical);
+			if (unlikely(!csum_root)) {
+				btrfs_err(trans->fs_info,
+				  "missing csum root for extent at bytenr %llu",
+					  sum->logical);
+				return -EUCLEAN;
+			}
+		}
+		trans->adding_csums = true;
 		ret = btrfs_csum_file_blocks(trans, csum_root, sum);
 		trans->adding_csums = false;
 		if (ret)
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index baadaaa189c0..230dd93dad6e 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -2295,8 +2295,7 @@ void raid56_parity_recover(struct bio *bio, struct btrfs_io_context *bioc,
 static void fill_data_csums(struct btrfs_raid_bio *rbio)
 {
 	struct btrfs_fs_info *fs_info = rbio->bioc->fs_info;
-	struct btrfs_root *csum_root = btrfs_csum_root(fs_info,
-						       rbio->bioc->full_stripe_logical);
+	struct btrfs_root *csum_root;
 	const u64 start = rbio->bioc->full_stripe_logical;
 	const u32 len = (rbio->nr_data * rbio->stripe_nsectors) <<
 			fs_info->sectorsize_bits;
@@ -2329,6 +2328,15 @@ static void fill_data_csums(struct btrfs_raid_bio *rbio)
 		goto error;
 	}
 
+	csum_root = btrfs_csum_root(fs_info, rbio->bioc->full_stripe_logical);
+	if (unlikely(!csum_root)) {
+		btrfs_err(fs_info,
+			  "missing csum root for extent at bytenr %llu",
+			  rbio->bioc->full_stripe_logical);
+		ret = -EUCLEAN;
+		goto error;
+	}
+
 	ret = btrfs_lookup_csums_bitmap(csum_root, NULL, start, start + len - 1,
 					rbio->csum_buf, rbio->csum_bitmap);
 	if (ret < 0)
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 93a5ae23406d..2625a66054d0 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -5654,6 +5654,14 @@ int btrfs_reloc_clone_csums(struct btrfs_ordered_extent *ordered)
 	LIST_HEAD(list);
 	int ret;
 
+	if (unlikely(!csum_root)) {
+		btrfs_mark_ordered_extent_error(ordered);
+		btrfs_err(fs_info,
+			  "missing csum root for extent at bytenr %llu",
+			  disk_bytenr);
+		return -EUCLEAN;
+	}
+
 	ret = btrfs_lookup_csums_list(csum_root, disk_bytenr,
 				      disk_bytenr + ordered->num_bytes - 1,
 				      &list, false);
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 37c272df52b0..9ff3933bc382 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -984,6 +984,13 @@ static noinline int replay_one_extent(struct walk_control *wc)
 
 		sums = list_first_entry(&ordered_sums, struct btrfs_ordered_sum, list);
 		csum_root = btrfs_csum_root(fs_info, sums->logical);
+		if (unlikely(!csum_root)) {
+			btrfs_err(fs_info,
+				  "missing csum root for extent at bytenr %llu",
+				  sums->logical);
+			ret = -EUCLEAN;
+		}
+
 		if (!ret) {
 			ret = btrfs_del_csums(trans, csum_root, sums->logical,
 					      sums->len);
@@ -4890,6 +4897,13 @@ static noinline int copy_items(struct btrfs_trans_handle *trans,
 		}
 
 		csum_root = btrfs_csum_root(trans->fs_info, disk_bytenr);
+		if (unlikely(!csum_root)) {
+			btrfs_err(trans->fs_info,
+				  "missing csum root for extent at bytenr %llu",
+				  disk_bytenr);
+			return -EUCLEAN;
+		}
+
 		disk_bytenr += extent_offset;
 		ret = btrfs_lookup_csums_list(csum_root, disk_bytenr,
 					      disk_bytenr + extent_num_bytes - 1,
@@ -5086,6 +5100,13 @@ static int log_extent_csums(struct btrfs_trans_handle *trans,
 	/* block start is already adjusted for the file extent offset. */
 	block_start = btrfs_extent_map_block_start(em);
 	csum_root = btrfs_csum_root(trans->fs_info, block_start);
+	if (unlikely(!csum_root)) {
+		btrfs_err(trans->fs_info,
+			  "missing csum root for extent at bytenr %llu",
+			  block_start);
+		return -EUCLEAN;
+	}
+
 	ret = btrfs_lookup_csums_list(csum_root, block_start + csum_offset,
 				      block_start + csum_offset + csum_len - 1,
 				      &ordered_sums, false);