From: Pavel Shilovsky pshilov@microsoft.com
commit d243af7ab9feb49f11f2c0050d2077e2d9556f9b upstream.
When the client hits a network reconnect, it re-opens every open file with a create context to reconnect a persistent handle. All create context types should be 8-bytes aligned but the padding was missed for that one. As a result, some servers don't allow us to reconnect handles and return an error. The problem occurs when the problematic context is not at the end of the create request packet. Fix this by adding a proper padding at the end of the reconnect persistent handle context.
Cc: Stable stable@vger.kernel.org # 4.19.x Signed-off-by: Pavel Shilovsky pshilov@microsoft.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/cifs/smb2pdu.h | 1 + 1 file changed, 1 insertion(+)
--- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -777,6 +777,7 @@ struct create_durable_handle_reconnect_v struct create_context ccontext; __u8 Name[8]; struct durable_reconnect_context_v2 dcontext; + __u8 Pad[4]; } __packed;
/* See MS-SMB2 2.2.13.2.5 */