diff --git a/arch/arm64/kernel/image-vars.h b/arch/arm64/kernel/image-vars.h
index 7ea4b84f15185d4a78177356136348c471cb1495..8d3fede89ae19848c8c3f5a2c67a1c3be0b40e2e 100644
--- a/arch/arm64/kernel/image-vars.h
+++ b/arch/arm64/kernel/image-vars.h
@@ -27,9 +27,6 @@ __efistub_primary_entry_offset	= primary_entry - _text;
  */
 __efistub_memcmp		= __pi_memcmp;
 __efistub_memchr		= __pi_memchr;
-__efistub_memcpy		= __pi_memcpy;
-__efistub_memmove		= __pi_memmove;
-__efistub_memset		= __pi_memset;
 __efistub_strlen		= __pi_strlen;
 __efistub_strnlen		= __pi_strnlen;
 __efistub_strcmp		= __pi_strcmp;
@@ -38,12 +35,6 @@ __efistub_strrchr		= __pi_strrchr;
 __efistub_strchr		= __pi_strchr;
 __efistub___clean_dcache_area_poc = __pi___clean_dcache_area_poc;
 
-#ifdef CONFIG_KASAN
-__efistub___memcpy		= __pi_memcpy;
-__efistub___memmove		= __pi_memmove;
-__efistub___memset		= __pi_memset;
-#endif
-
 __efistub__text			= _text;
 __efistub__end			= _end;
 __efistub__edata		= _edata;
diff --git a/arch/loongarch/kernel/image-vars.h b/arch/loongarch/kernel/image-vars.h
index c901ebb903f2dd4e0ab7bdbadbd2d27e0e79b50b..88f5d81702dfcf688dd44defac9a1ebd194a6c66 100644
--- a/arch/loongarch/kernel/image-vars.h
+++ b/arch/loongarch/kernel/image-vars.h
@@ -9,9 +9,6 @@
 
 __efistub_memcmp		= memcmp;
 __efistub_memchr		= memchr;
-__efistub_memcpy		= memcpy;
-__efistub_memmove		= memmove;
-__efistub_memset		= memset;
 __efistub_strcat		= strcat;
 __efistub_strcmp		= strcmp;
 __efistub_strlen		= strlen;
diff --git a/arch/riscv/kernel/image-vars.h b/arch/riscv/kernel/image-vars.h
index 8c212efb37a64cf0ff33a4fa98a2ac74f625174a..bf1c73b5a5b929d1c7068ea915622cc1b3cdcff4 100644
--- a/arch/riscv/kernel/image-vars.h
+++ b/arch/riscv/kernel/image-vars.h
@@ -25,21 +25,12 @@
  */
 __efistub_memcmp		= memcmp;
 __efistub_memchr		= memchr;
-__efistub_memcpy		= memcpy;
-__efistub_memmove		= memmove;
-__efistub_memset		= memset;
 __efistub_strlen		= strlen;
 __efistub_strnlen		= strnlen;
 __efistub_strcmp		= strcmp;
 __efistub_strncmp		= strncmp;
 __efistub_strrchr		= strrchr;
 
-#ifdef CONFIG_KASAN
-__efistub___memcpy		= memcpy;
-__efistub___memmove		= memmove;
-__efistub___memset		= memset;
-#endif
-
 __efistub__start		= _start;
 __efistub__start_kernel		= _start_kernel;
 __efistub__end			= _end;
diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
index 97c7c5deeb8ac55fdafdc787ac65e32788ef88e0..5b5ae50d805ae29c1922e235efc165e783cc73ee 100644
--- a/drivers/firmware/efi/libstub/Makefile
+++ b/drivers/firmware/efi/libstub/Makefile
@@ -63,7 +63,7 @@ efi-deps-y := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c fdt_empty_tree.c fdt_sw.c
 $(obj)/lib-%.o: $(srctree)/lib/%.c FORCE
 	$(call if_changed_rule,cc_o_c)
 
-lib-$(CONFIG_EFI_GENERIC_STUB)	+= efi-stub.o fdt.o string.o \
+lib-$(CONFIG_EFI_GENERIC_STUB)	+= efi-stub.o fdt.o string.o intrinsics.o \
 				   $(patsubst %.c,lib-%.o,$(efi-deps-y))
 
 lib-$(CONFIG_ARM)		+= arm32-stub.o
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index 969d964d08af60bb247b7d3924ddf845bc969582..db009721f5434f9e0f1333ad9e139b4b8d9369d4 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -298,8 +298,8 @@ union efi_boot_services {
 		efi_status_t (__efiapi *install_multiple_protocol_interfaces)(efi_handle_t *, ...);
 		efi_status_t (__efiapi *uninstall_multiple_protocol_interfaces)(efi_handle_t, ...);
 		void *calculate_crc32;
-		void *copy_mem;
-		void *set_mem;
+		void (__efiapi *copy_mem)(void *, const void *, unsigned long);
+		void (__efiapi *set_mem)(void *, unsigned long, unsigned char);
 		void *create_event_ex;
 	};
 	struct {
diff --git a/drivers/firmware/efi/libstub/intrinsics.c b/drivers/firmware/efi/libstub/intrinsics.c
new file mode 100644
index 0000000000000000000000000000000000000000..a04ab39292b62d2bf53d69e461967befc4dd1c0f
--- /dev/null
+++ b/drivers/firmware/efi/libstub/intrinsics.c
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/efi.h>
+#include <asm/efi.h>
+#include <asm/string.h>
+
+#include "efistub.h"
+
+#ifdef CONFIG_KASAN
+#undef memcpy
+#undef memmove
+#undef memset
+void *__memcpy(void *__dest, const void *__src, size_t __n) __alias(memcpy);
+void *__memmove(void *__dest, const void *__src, size_t count) __alias(memmove);
+void *__memset(void *s, int c, size_t count) __alias(memset);
+#endif
+
+void *memcpy(void *dst, const void *src, size_t len)
+{
+	efi_bs_call(copy_mem, dst, src, len);
+	return dst;
+}
+
+extern void *memmove(void *dst, const void *src, size_t len) __alias(memcpy);
+
+void *memset(void *dst, int c, size_t len)
+{
+	efi_bs_call(set_mem, dst, len, c & U8_MAX);
+	return dst;
+}