From: Tejun Heo Date: Wed, 18 Jul 2007 07:14:45 +0000 (+0900) Subject: sysfs: kill an extra put in sysfs_create_link() failure path X-Git-Tag: v2.6.23-rc1~480^2~1 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=a1da4dfe35bc36c3bc9716d995c85b7983c38a76;p=linux-2.6-omap-h63xx.git sysfs: kill an extra put in sysfs_create_link() failure path There is a subtle bug in sysfs_create_link() failure path. When symlink creation fails because there's already a node with the same name, the target sysfs_dirent is put twice - once by failure path of sysfs_create_link() and once more when the symlink is released. Fix it by making only the symlink node responsible for putting target_sd. Signed-off-by: Tejun Heo Cc: Gabriel C Cc: Miles Lane Signed-off-by: Greg Kroah-Hartman --- diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c index 2f86e042229..d056e9695cd 100644 --- a/fs/sysfs/symlink.c +++ b/fs/sysfs/symlink.c @@ -86,7 +86,9 @@ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char sd = sysfs_new_dirent(name, S_IFLNK|S_IRWXUGO, SYSFS_KOBJ_LINK); if (!sd) goto out_put; + sd->s_elem.symlink.target_sd = target_sd; + target_sd = NULL; /* reference is now owned by the symlink */ sysfs_addrm_start(&acxt, parent_sd);