Pad images to original sizes with zero

Close #2005
2020-09-26 14:36:57 -07:00 · 2020-09-26 14:36:57 -07:00 · c91ebfbcc1
commit c91ebfbcc1
parent 2f232fc670
1 changed files with 7 additions and 0 deletions
--- a/native/jni/magiskboot/bootimg.cpp
+++ b/native/jni/magiskboot/bootimg.cpp
@ -524,6 +524,13 @@ void repack(const char* src_img, const char* out_img, bool nocomp) {
 		restore_buf(fd, LG_BUMP_MAGIC, 16);
 	}

+	// Pad image to at least original size
+	auto current_sz = lseek(fd, 0, SEEK_CUR);
+	if (current_sz < boot.map_size) {
+		int padding = boot.map_size - current_sz;
+		write_zero(fd, padding);
+	}
+
 	close(fd);

 	/*********************