diff options
| author | Niels de Vos <ndevos@redhat.com> | 2013-07-17 14:53:53 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@suse.cz> | 2013-07-17 14:53:53 +0200 |
| commit | 53ce9a3364de0723b27d861de93bfc882f7db050 (patch) | |
| tree | 0e8d69c9544fd3c55d9c8bf198485abd07e26f1a /fs/fuse | |
| parent | ad81f0545ef01ea651886dddac4bef6cec930092 (diff) | |
| download | lwn-53ce9a3364de0723b27d861de93bfc882f7db050.tar.gz lwn-53ce9a3364de0723b27d861de93bfc882f7db050.zip | |
fuse: readdirplus: fix dentry leak
In case d_lookup() returns a dentry with d_inode == NULL, the dentry is not
returned with dput(). This results in triggering a BUG() in
shrink_dcache_for_umount_subtree():
BUG: Dentry ...{i=0,n=...} still in use (1) [unmount of fuse fuse]
[SzM: need to d_drop() as well]
Reported-by: Justin Clift <jclift@redhat.com>
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Tested-by: Brian Foster <bfoster@redhat.com>
Tested-by: Niels de Vos <ndevos@redhat.com>
CC: stable@vger.kernel.org
Diffstat (limited to 'fs/fuse')
| -rw-r--r-- | fs/fuse/dir.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 0eda52738ec4..2ae5308174e2 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -1227,9 +1227,15 @@ static int fuse_direntplus_link(struct file *file, name.hash = full_name_hash(name.name, name.len); dentry = d_lookup(parent, &name); - if (dentry && dentry->d_inode) { + if (dentry) { inode = dentry->d_inode; - if (get_node_id(inode) == o->nodeid) { + if (!inode) { + d_drop(dentry); + } else if (get_node_id(inode) != o->nodeid) { + err = d_invalidate(dentry); + if (err) + goto out; + } else { struct fuse_inode *fi; fi = get_fuse_inode(inode); spin_lock(&fc->lock); @@ -1242,9 +1248,6 @@ static int fuse_direntplus_link(struct file *file, */ goto found; } - err = d_invalidate(dentry); - if (err) - goto out; dput(dentry); dentry = NULL; } |