linux-kernel - kobject_add unreachable code

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-id: <4594BA09.1080509@odesys.com>
Date:	Thu, 28 Dec 2006 22:47:37 -0800
From:	Martin Stoilov <mstoilov@...sys.com>
To:	linux-kernel@...r.kernel.org
Subject: kobject_add unreachable code

The following code in kobject_add
    if (!kobj->k_name)
        kobj->k_name = kobj->name;
    if (!kobj->k_name) {
        pr_debug("kobject attempted to be registered with no name!\n");
        WARN_ON(1);
        return -EINVAL;
    }

doesn't look right to me. The second 'if' statement looks useless after
the assignment in the first one. May be it was meant to be like:
if (!*kobj->k_name)

See the full patch:

--- linux-2.6.20-rc2/lib/kobject.c      2006-12-28 19:59:56.000000000 -0800
+++ linux-2.6.20-rc2.mod/lib/kobject.c  2006-12-28 20:00:25.000000000 -0800
@@ -161,19 +161,19 @@
 int kobject_add(struct kobject * kobj)
 {
        int error = 0;
        struct kobject * parent;

        if (!(kobj = kobject_get(kobj)))
                return -ENOENT;
        if (!kobj->k_name)
                kobj->k_name = kobj->name;
-       if (!kobj->k_name) {
+       if (!*kobj->k_name) {
                pr_debug("kobject attempted to be registered with no
name!\n");
                WARN_ON(1);
                return -EINVAL;
        }
        parent = kobject_get(kobj->parent);


-Martin

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/