https://github.com/termux/termux-packages/issues/16476

--- a/read.c
+++ b/read.c
@@ -445,6 +445,11 @@
 		return -1;
 	}
 
+	if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
+		mandoc_msg(MANDOCERR_BADARG_BAD, 0, 0, "%s", strerror(EINVAL));
+		return -1;
+	}
+
 	/*
 	 * If we're a regular file, try just reading in the whole entry
 	 * via mmap().  This is faster than reading it into blocks, and