fix use-after-free and add va_end in ft_printf

jdecorte-be · jdecorte-be · commit 4a1ee5708d95 · 2026-03-11T18:16:50.000+01:00
diff --git a/ft_printf.c b/ft_printf.c
@@ -42,6 +42,7 @@ int	ft_printf(const char *input, ...)
 {
 	t_print	*tab;
 	int		i;
+	int		len;
 
 	tab = malloc(sizeof(t_print));
 	if (!tab)
@@ -63,6 +64,8 @@ int	ft_printf(const char *input, ...)
 		}
 		i++;
 	}
+	va_end(tab->args);
+	len = tab->len;
 	free(tab);
-	return (tab->len);
+	return (len);
 }

Original file line number	Diff line number	Diff line change
`@@ -42,6 +42,7 @@ int ft_printf(const char *input, ...)`
`42`	`42`	`{`
`43`	`43`	`t_print *tab;`
`44`	`44`	`int i;`
	`45`	`+ int len;`
`45`	`46`
`46`	`47`	`tab = malloc(sizeof(t_print));`
`47`	`48`	`if (!tab)`
`@@ -63,6 +64,8 @@ int ft_printf(const char *input, ...)`
`63`	`64`	`}`
`64`	`65`	`i++;`
`65`	`66`	`}`
	`67`	`+ va_end(tab->args);`
	`68`	`+ len = tab->len;`
`66`	`69`	`free(tab);`
`67`		`- return (tab->len);`
	`70`	`+ return (len);`
`68`	`71`	`}`