protos/multiboot2: Fix unsigned underflow in relocatable descent loop
diff --git a/common/protos/multiboot2.c b/common/protos/multiboot2.c
index ff42d7c1..cad1160d 100644
--- a/common/protos/multiboot2.c
+++ b/common/protos/multiboot2.c
@@ -404,10 +404,10 @@ noreturn void multiboot2_load(char *config, char* cmdline) {
goto reloc_fail;
}
} else {
- relocated_base -= reloc_tag.align;
- if (relocated_base < reloc_tag.min_addr) {
+ if (relocated_base - reloc_tag.min_addr < reloc_tag.align) {
goto reloc_fail;
}
+ relocated_base -= reloc_tag.align;
}
}
