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From: Greg KH <greg@kroah.com>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Subject: [PATCH 1/28] Kobject: make kobject apis more robust in handling NULL pointers
Date: Wed,  7 Feb 2007 16:29:49 -0800	[thread overview]
Message-ID: <11708946163722-git-send-email-greg@kroah.com> (raw)
In-Reply-To: <20070208002908.GA4796@kroah.com>

From: Greg Kroah-Hartman <gregkh@suse.de>

It should be ok to pass in NULL for some kobject functions, so add error
checking for all exported kobject functions to be more robust.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 lib/kobject.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/lib/kobject.c b/lib/kobject.c
index 7ce6dc1..9aed594 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -126,6 +126,8 @@ EXPORT_SYMBOL_GPL(kobject_get_path);
  */
 void kobject_init(struct kobject * kobj)
 {
+	if (!kobj)
+		return;
 	kref_init(&kobj->kref);
 	INIT_LIST_HEAD(&kobj->entry);
 	init_waitqueue_head(&kobj->poll);
@@ -366,6 +368,8 @@ out:
 
 void kobject_del(struct kobject * kobj)
 {
+	if (!kobj)
+		return;
 	sysfs_remove_dir(kobj);
 	unlink(kobj);
 }
@@ -377,6 +381,8 @@ void kobject_del(struct kobject * kobj)
 
 void kobject_unregister(struct kobject * kobj)
 {
+	if (!kobj)
+		return;
 	pr_debug("kobject %s: unregistering\n",kobject_name(kobj));
 	kobject_uevent(kobj, KOBJ_REMOVE);
 	kobject_del(kobj);
@@ -523,6 +529,8 @@ int kset_add(struct kset * k)
 
 int kset_register(struct kset * k)
 {
+	if (!k)
+		return -EINVAL;
 	kset_init(k);
 	return kset_add(k);
 }
@@ -535,6 +543,8 @@ int kset_register(struct kset * k)
 
 void kset_unregister(struct kset * k)
 {
+	if (!k)
+		return;
 	kobject_unregister(&k->kobj);
 }
 
@@ -586,6 +596,9 @@ int subsystem_register(struct subsystem * s)
 {
 	int error;
 
+	if (!s)
+		return -EINVAL;
+
 	subsystem_init(s);
 	pr_debug("subsystem %s: registering\n",s->kset.kobj.name);
 
@@ -598,6 +611,8 @@ int subsystem_register(struct subsystem * s)
 
 void subsystem_unregister(struct subsystem * s)
 {
+	if (!s)
+		return;
 	pr_debug("subsystem %s: unregistering\n",s->kset.kobj.name);
 	kset_unregister(&s->kset);
 }
@@ -612,6 +627,10 @@ void subsystem_unregister(struct subsystem * s)
 int subsys_create_file(struct subsystem * s, struct subsys_attribute * a)
 {
 	int error = 0;
+
+	if (!s || !a)
+		return -EINVAL;
+
 	if (subsys_get(s)) {
 		error = sysfs_create_file(&s->kset.kobj,&a->attr);
 		subsys_put(s);
-- 
1.4.4.4


  reply	other threads:[~2007-02-08  0:31 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-08  0:29 [GIT PATCH] Driver core patches for 2.6.20 Greg KH
2007-02-08  0:29 ` Greg KH [this message]
2007-02-08  0:29   ` [PATCH 2/28] Driver core: convert pcmcia code to use struct device Greg KH
2007-02-08  0:29     ` [PATCH 3/28] Driver core: convert SPI " Greg KH
2007-02-08  0:29       ` [PATCH 4/28] Network: convert network devices to use struct device instead of class_device Greg KH
2007-02-08  0:29         ` [PATCH 5/28] driver core: Remove device_is_registered() in device_move() Greg KH
2007-02-08  0:29           ` [PATCH 6/28] driver core: Allow device_move(dev, NULL) Greg KH
2007-02-08  0:29             ` [PATCH 7/28] MODULES: add the module name for built in kernel drivers Greg KH
2007-02-08  0:29               ` [PATCH 8/28] Modules: only add drivers/ direcory if needed Greg KH
2007-02-08  0:29                 ` [PATCH 9/28] PCI: add the sysfs driver name to all modules Greg KH
2007-02-08  0:29                   ` [PATCH 10/28] SERIO: " Greg KH
2007-02-08  0:29                     ` [PATCH 11/28] USB: " Greg KH
2007-02-08  0:30                       ` [PATCH 12/28] /sys/modules/*/holders Greg KH
2007-02-08  0:30                         ` [PATCH 13/28] driver core fixes: make_class_name() retval checks Greg KH
2007-02-08  0:30                           ` [PATCH 14/28] driver core fixes: device_register() retval check in platform.c Greg KH
2007-02-08  0:30                             ` [PATCH 15/28] driver core: Don't stop probing on ->probe errors Greg KH
2007-02-08  0:30                               ` [PATCH 16/28] driver core: Change function call order in device_bind_driver() Greg KH
2007-02-08  0:30                                 ` [PATCH 17/28] Driver core: fix race in sysfs between sysfs_remove_file() and read()/write() Greg KH
2007-02-08  0:30                                   ` [PATCH 18/28] sysfs: suppress lockdep warnings Greg KH
2007-02-08  0:30                                     ` [PATCH 19/28] sysfs: kobject_put cleanup Greg KH
2007-02-08  0:30                                       ` [PATCH 20/28] kobject: " Greg KH
2007-02-08  0:30                                         ` [PATCH 21/28] sysfs: error handling in sysfs, fill_read_buffer() Greg KH
2007-02-08  0:30                                           ` [PATCH 22/28] HOWTO: Add a reference to Harbison and Steele Greg KH
2007-02-08  0:30                                             ` [PATCH 23/28] SYSFS: Fix missing include of list.h in sysfs.h Greg KH
2007-02-08  0:30                                               ` [PATCH 24/28] Driver core: add uevent vars for devices of a class Greg KH
2007-02-08  0:30                                                 ` [PATCH 25/28] Driver core: add device_type to struct device Greg KH
2007-02-08  0:30                                                   ` [PATCH 26/28] Driver core: allow to delay the uevent at device creation time Greg KH
2007-02-08  0:30                                                     ` [PATCH 27/28] Driver Core: Increase the default timeout value of the firmware subsystem Greg KH
2007-02-08  0:30                                                       ` [PATCH 28/28] sysfs: Shadow directory support Greg KH
2007-02-08 17:20                     ` [PATCH 10/28] SERIO: add the sysfs driver name to all modules Dmitry Torokhov
2007-02-08 18:51                       ` Greg KH

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