From: Tejun Heo <htejun@gmail.com>
Date: Wed, 13 Jun 2007 18:45:13 +0000 (+0900)
Subject: sysfs: make sysfs_put() ignore NULL sd
X-Git-Tag: Ubuntu-5.4-5.4.0-11.14~44528^2~37
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=7a23ad44047b1084a032bc0d127fe08af024593a;p=mirror_ubuntu-focal-kernel.git

sysfs: make sysfs_put() ignore NULL sd

Make sysfs_put() ignore NULL sd instead of oopsing.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 687d959f606d..f4fdbbffd571 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -111,7 +111,7 @@ static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
 
 static inline void sysfs_put(struct sysfs_dirent * sd)
 {
-	if (atomic_dec_and_test(&sd->s_count))
+	if (sd && atomic_dec_and_test(&sd->s_count))
 		release_sysfs_dirent(sd);
 }