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[PATCH] namespace.c: fix mnt_namespace zeroing for expired mounts

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This patch clears mnt_namespace in an expired mount.

If mnt_namespace is not cleared, it's possible to attach a new mount to the
already detached mount, because check_mnt() can return true.

The effect is a resource leak, since the resulting tree will never be
freed.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Miklos Szeredi 2005-07-07 17:57:27 -07:00 committed by Linus Torvalds
parent ed42c879b7
commit ac0811538b
1 changed files with 1 additions and 0 deletions
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fs/namespace.c
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@ -847,6 +847,7 @@ static void expire_mount(struct vfsmount *mnt, struct list_head *mounts)
/* delete from the namespace */
list_del_init(&mnt->mnt_list);
mnt->mnt_namespace = NULL;
detach_mnt(mnt, &old_nd);
spin_unlock(&vfsmount_lock);
path_release(&old_nd);