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authorTejun Heo <tj@kernel.org>2013-11-24 02:21:47 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-11-28 01:14:43 +0400
commitae2108ad32f5ca55e9895d5597e6552be1607569 (patch)
tree29efed50ed5afcd4e2e49886ad281ba50b264fa8
parentc84a3b27798dfce928b867fa1c9f3c3fd66f0a31 (diff)
downloadlinux-ae2108ad32f5ca55e9895d5597e6552be1607569.tar.xz
sysfs: make __sysfs_add_one() fail if the parent isn't a directory
Currently the kobject based interface guarantees that a parent sysfs_dirent is always a directory; however, the planned kernfs interface will be directly based on sysfs_dirents and the caller may specify non-directory node as the parent. Add an explicit check in __sysfs_add_one() so that such attempts fail with -EINVAL. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/sysfs/dir.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index b3cf61dc57c1..98701c00b9b0 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -429,6 +429,9 @@ int __sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd,
return -EINVAL;
}
+ if (sysfs_type(parent_sd) != SYSFS_DIR)
+ return -EINVAL;
+
sd->s_hash = sysfs_name_hash(sd->s_name, sd->s_ns);
sd->s_parent = sysfs_get(parent_sd);