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authorNiels de Vos <ndevos@redhat.com>2013-07-17 16:53:53 +0400
committerMiklos Szeredi <mszeredi@suse.cz>2013-07-17 16:53:53 +0400
commit53ce9a3364de0723b27d861de93bfc882f7db050 (patch)
tree0e8d69c9544fd3c55d9c8bf198485abd07e26f1a /fs/fuse/dir.c
parentad81f0545ef01ea651886dddac4bef6cec930092 (diff)
downloadlinux-53ce9a3364de0723b27d861de93bfc882f7db050.tar.xz
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/dir.c')
-rw-r--r--fs/fuse/dir.c13
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;
}