fix bug

CCXXXI · Jan 10, 2021 · c6e8b68 · c6e8b68
1 parent 2e9beba
commit c6e8b68
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/userprog/syscall.c b/src/userprog/syscall.c
@@ -171,7 +171,7 @@ static bool is_valid_str(const char *str)
     for (char *c = str; *c != '\0';)
     {
         ++c;
-        if (c - str + 2 == PGSIZE || (unsigned)c & PGMASK == 0 && !is_valid_ptr(c))
+        if (c - str + 2 == PGSIZE || !is_valid_ptr(c))
             return false;
     }