From: Al Viro <viro@xxxxxxxxxxxxxxxxxx> commit 6f18493e541c690169c3b1479d47d95f624161cf upstream. and lock the right list there Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx> Acked-by: NeilBrown <neilb@xxxxxxxx> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> Signed-off-by: Willy Tarreau <w@xxxxxx> --- fs/dcache.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/dcache.c b/fs/dcache.c index 2d0b9d2..f4fd965 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -2405,6 +2405,12 @@ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon) dentry->d_parent = dentry; list_del_init(&dentry->d_child); anon->d_parent = dparent; + if (likely(!d_unhashed(anon))) { + hlist_bl_lock(&anon->d_sb->s_anon); + __hlist_bl_del(&anon->d_hash); + anon->d_hash.pprev = NULL; + hlist_bl_unlock(&anon->d_sb->s_anon); + } list_move(&anon->d_child, &dparent->d_subdirs); write_seqcount_end(&dentry->d_seq); @@ -2459,7 +2465,6 @@ struct dentry *d_materialise_unique(struct dentry *dentry, struct inode *inode) * could splice into our tree? */ __d_materialise_dentry(dentry, alias); write_sequnlock(&rename_lock); - __d_drop(alias); goto found; } else { /* Nope, but we must(!) avoid directory -- 2.8.0.rc2.1.gbe9624a