From: Chih-Yen Chang cc85nod@gmail.com
commit 443d61d1fa9faa60ef925513d83742902390100f upstream.
ksmbd_smb2_check_message allows client to return one byte more, so we need to allocate additional memory in ksmbd_conn_handler_loop to avoid out-of-bound access.
Cc: stable@vger.kernel.org Signed-off-by: Chih-Yen Chang cc85nod@gmail.com Acked-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ksmbd/connection.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/ksmbd/connection.c +++ b/fs/ksmbd/connection.c @@ -320,7 +320,8 @@ int ksmbd_conn_handler_loop(void *p) break;
/* 4 for rfc1002 length field */ - size = pdu_size + 4; + /* 1 for implied bcc[0] */ + size = pdu_size + 4 + 1; conn->request_buf = kvmalloc(size, GFP_KERNEL); if (!conn->request_buf) break;