From 6f18493e541c690169c3b1479d47d95f624161cf Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 11 Sep 2014 18:55:50 -0400 Subject: [PATCH] move the call of __d_drop(anon) into __d_materialise_unique(dentry, anon) and lock the right list there Cc: stable@vger.kernel.org Signed-off-by: Al Viro --- fs/dcache.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/fs/dcache.c b/fs/dcache.c index d30ce699ae4b..5c6e71dc23f5 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -2656,6 +2656,12 @@ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon) dentry->d_parent = dentry; list_del_init(&dentry->d_u.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_u.d_child, &dparent->d_subdirs); write_seqcount_end(&dentry->d_seq); @@ -2714,7 +2720,6 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry) write_seqlock(&rename_lock); __d_materialise_dentry(dentry, new); write_sequnlock(&rename_lock); - __d_drop(new); _d_rehash(new); spin_unlock(&new->d_lock); spin_unlock(&inode->i_lock); @@ -2778,7 +2783,6 @@ 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 -- GitLab