From d22e6338db7f613dd4f6095c190682fcc519e4b7 Mon Sep 17 00:00:00 2001 From: Oleg Drokin Date: Fri, 31 Jan 2014 15:41:58 -0500 Subject: [PATCH] Fix mountpoint reference leakage in linkat Recent changes to retry on ESTALE in linkat (commit 442e31ca5a49e398351b2954b51f578353fdf210) introduced a mountpoint reference leak and a small memory leak in case a filesystem link operation returns ESTALE which is pretty normal for distributed filesystems like lustre, nfs and so on. Free old_path in such a case. [AV: there was another missing path_put() nearby - on the previous goto retry] Signed-off-by: Oleg Drokin: Signed-off-by: Al Viro --- fs/namei.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/namei.c b/fs/namei.c index 445d9bbc21eb..d580df2e6804 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -3926,10 +3926,13 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname, done_path_create(&new_path, new_dentry); if (delegated_inode) { error = break_deleg_wait(&delegated_inode); - if (!error) + if (!error) { + path_put(&old_path); goto retry; + } } if (retry_estale(error, how)) { + path_put(&old_path); how |= LOOKUP_REVAL; goto retry; }