From 4919c5e45a91b5db5a41695fe0357fbdff0d5767 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 3 Mar 2010 14:13:08 -0500 Subject: [PATCH] fix race in d_splice_alias() rehashing the negative placeholder opens a race with d_lookup(); we unhash it almost immediately (by d_move()), but the race window is there. Since d_move() doesn't rely on target being hashed, we don't need that d_rehash() at all. Signed-off-by: Al Viro --- fs/dcache.c | 1 - 1 file changed, 1 deletion(-) diff --git a/fs/dcache.c b/fs/dcache.c index 74da947b160b..f1358e5c3a59 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1222,7 +1222,6 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry) BUG_ON(!(new->d_flags & DCACHE_DISCONNECTED)); spin_unlock(&dcache_lock); security_d_instantiate(new, inode); - d_rehash(dentry); d_move(new, dentry); iput(inode); } else { -- GitLab