--- a/package/base-files/files/lib/upgrade/nand.sh
+++ b/package/base-files/files/lib/upgrade/nand.sh
@@ -460,6 +460,11 @@ ubi_do_upgrade() {
 	local dual_boot=$(cat /sys/module/boot_param/parameters/dual_boot 2>/dev/null)
 	local file_type=$(identify $1)
 
+	if [ -b /dev/dm-0 ]; then
+		v "Detach all device mapper devices"
+		dmsetup remove_all
+	fi
+
 	if [ x"${dual_boot}" != xY ]; then
 		nand_do_upgrade "$1"
 		return
--- a/target/linux/mediatek/base-files/lib/upgrade/mmc.sh
+++ b/target/linux/mediatek/base-files/lib/upgrade/mmc.sh
@@ -217,6 +217,11 @@ mtk_mmc_do_upgrade_dual_boot() {
 mtk_mmc_do_upgrade() {
 	local dual_boot=$(cat /sys/module/boot_param/parameters/dual_boot 2>/dev/null)
 
+	if [ -b /dev/dm-0 ]; then
+		v "Detach all device mapper devices"
+		dmsetup remove_all
+	fi
+
 	if [ x"${dual_boot}" = xY ]; then
 		mtk_mmc_do_upgrade_dual_boot "$1"
 	else
--- a/target/linux/mediatek/mt7981/base-files/lib/upgrade/platform.sh
+++ b/target/linux/mediatek/mt7981/base-files/lib/upgrade/platform.sh
@@ -1,4 +1,4 @@
-RAMFS_COPY_BIN='mkfs.f2fs blkid blockdev fw_printenv fw_setenv'
+RAMFS_COPY_BIN='mkfs.f2fs blkid blockdev fw_printenv fw_setenv dmsetup'
 RAMFS_COPY_DATA="/etc/fw_env.config /var/lock/fw_printenv.lock"
 platform_do_upgrade() {
 	local board=$(board_name)
--- a/target/linux/mediatek/mt7986/base-files/lib/upgrade/platform.sh
+++ b/target/linux/mediatek/mt7986/base-files/lib/upgrade/platform.sh
@@ -1,4 +1,4 @@
-RAMFS_COPY_BIN='mkfs.f2fs blkid blockdev fw_printenv fw_setenv'
+RAMFS_COPY_BIN='mkfs.f2fs blkid blockdev fw_printenv fw_setenv dmsetup'
 RAMFS_COPY_DATA="/etc/fw_env.config /var/lock/fw_printenv.lock"
 
 platform_do_upgrade() {