From: Namjae Jeon linkinjeon@kernel.org
[ Upstream commit 10379171f346e6f61d30d9949500a8de4336444a ]
The list_first_entry() macro never returns NULL. If the list is empty then it returns an invalid pointer. Use list_first_entry_or_null() to check if the list is empty.
Reported-by: kernel test robot lkp@intel.com Reported-by: Dan Carpenter dan.carpenter@linaro.org Closes: https://lore.kernel.org/r/202505080231.7OXwq4Te-lkp@intel.com/ Signed-off-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/smb/server/oplock.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/fs/smb/server/oplock.c b/fs/smb/server/oplock.c index 72294764d4c20..e564432643ea3 100644 --- a/fs/smb/server/oplock.c +++ b/fs/smb/server/oplock.c @@ -146,12 +146,9 @@ static struct oplock_info *opinfo_get_list(struct ksmbd_inode *ci) { struct oplock_info *opinfo;
- if (list_empty(&ci->m_op_list)) - return NULL; - down_read(&ci->m_lock); - opinfo = list_first_entry(&ci->m_op_list, struct oplock_info, - op_entry); + opinfo = list_first_entry_or_null(&ci->m_op_list, struct oplock_info, + op_entry); if (opinfo) { if (opinfo->conn == NULL || !atomic_inc_not_zero(&opinfo->refcount))