wai.h

commit 2b3c39d18c4c751d36a0904f00efbf015fda7d4b
parent 47406b5defae9d4ec6a94aeee9454514d835d42b
Author: CSDUMMI <csdummi.misquality@simplelogin.co>
Date:   Sat, 10 May 2025 18:42:55 +0200

Fix buffer overflow error by only supplying st_size to fread once

Diffstat:
M
Makefile
 | 
3
+--
M
wai.c
 | 
3
+--

2 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/Makefile b/Makefile
@@ -3,10 +3,9 @@
 # SPDX-License-Identifier: GPL-3.0
 
 wai: wai.c
-	gcc -Wall -Wextra -o wai wai.c
+	gcc -ggdb -Wall -Wextra -o wai wai.c
 
 # tests/factorial.wasm: tests/factorial.wat
 .PHONY: tests
 tests:
 	wat2wasm -o tests/factorial.wasm tests/factorial.wat
-
diff --git a/wai.c b/wai.c
@@ -338,7 +338,6 @@ int parse_module(u_char *binary, size_t len) {
   return i;
 }
 
-
 int main(int argc, char **argv) {
   
   if (argc != 2) {
@@ -356,7 +355,7 @@ int main(int argc, char **argv) {
   printf("size: %ld\n", st.st_size);
   
   unsigned char *binary = malloc(st.st_size);
-  fread(binary, st.st_size, st.st_size, file);
+  fread(binary, st.st_size, 1, file);
 
   if (parse_module(binary, st.st_size) == -1) {
     printf("error :(\n");