testing/fatutf8:fix Out of bounds writing

zhuanglinx · GUIDINGLI · commit 5b2397b59542 · 2024-10-27T22:30:39.000+08:00
Signed-off-by: zhuanglin &lt;zhuanglin@xiaomi.com&gt;
diff --git a/testing/fatutf8/fatutf8_main.c b/testing/fatutf8/fatutf8_main.c
@@ -145,7 +145,7 @@ int main(int argc, FAR char *argv[])
     {
       printf("open successful\n");
 
-      len = read(fd, buf, sizeof(buf));
+      len = read(fd, buf, sizeof(buf) - 1);
 
       if (len >= 0)
         {

Original file line number	Diff line number	Diff line change
`@@ -145,7 +145,7 @@ int main(int argc, FAR char *argv[])`
`145`	`145`	`{`
`146`	`146`	`printf("open successful\n");`
`147`	`147`
`148`		`- len = read(fd, buf, sizeof(buf));`
	`148`	`+ len = read(fd, buf, sizeof(buf) - 1);`
`149`	`149`
`150`	`150`	`if (len >= 0)`
`151`	`151`	`{`