[PATCH 5.15 131/177] ksmbd: increment reference count of parent fp

Greg Kroah-Hartman
2022-05-04T17:32:31Z

From: Namjae Jeon <linkinjeon@kernel.org>

[ Upstream commit 8510a043d334ecdf83d4604782f288db6bf21d60 ]

Add missing increment reference count of parent fp in
ksmbd_lookup_fd_inode().

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/ksmbd/smb2pdu.c | 2 ++
fs/ksmbd/vfs_cache.c | 1 +
2 files changed, 3 insertions(+)

diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index 192d8308afc2..a9fdb47c2791 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -5768,8 +5768,10 @@ static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
if (parent_fp) {
if (parent_fp->daccess & FILE_DELETE_LE) {
pr_err("parent dir is opened with delete access\n");
+ ksmbd_fd_put(work, parent_fp);
return -ESHARE;
}
+ ksmbd_fd_put(work, parent_fp);
}
next:
return smb2_rename(work, fp, user_ns, rename_info,
diff --git a/fs/ksmbd/vfs_cache.c b/fs/ksmbd/vfs_cache.c
index 29c1db66bd0f..8b873d92d785 100644
--- a/fs/ksmbd/vfs_cache.c
+++ b/fs/ksmbd/vfs_cache.c
@@ -497,6 +497,7 @@ struct ksmbd_file *ksmbd_lookup_fd_inode(struct inode *inode)
list_for_each_entry(lfp, &ci->m_fp_list, node) {
if (inode == file_inode(lfp->filp)) {
atomic_dec(&ci->m_count);
+ lfp = ksmbd_fp_get(lfp);
read_unlock(&ci->m_lock);
return lfp;
}
--
2.35.1