Hello Takashi Sakamoto,
The patch e12ec251e4db: "ALSA: seq: obsolete change of address limit" from Aug 13, 2016, leads to the following static checker warning:
sound/core/seq/seq_compat.c:61 snd_seq_call_port_info_ioctl() warn: did you mean to pass the address of 'data'
sound/core/seq/seq_compat.c 45 static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned int cmd, 46 struct snd_seq_port_info32 __user *data32) 47 { 48 int err = -EFAULT; 49 struct snd_seq_port_info *data; 50 51 data = kmalloc(sizeof(*data), GFP_KERNEL); 52 if (!data) 53 return -ENOMEM; 54 55 if (copy_from_user(data, data32, sizeof(*data32)) || 56 get_user(data->flags, &data32->flags) || 57 get_user(data->time_queue, &data32->time_queue)) 58 goto error; 59 data->kernel = NULL; 60 61 err = snd_seq_kernel_client_ctl(client->number, cmd, &data);
This should almost certainly be "cmd, data);" without the &. Have you tested this? It eventually gets passed to functions like snd_seq_ioctl_create_port().
62 if (err < 0) 63 goto error; 64 65 if (copy_to_user(data32, data, sizeof(*data32)) || 66 put_user(data->flags, &data32->flags) || 67 put_user(data->time_queue, &data32->time_queue)) 68 err = -EFAULT; 69 70 error: 71 kfree(data); 72 return err; 73 }
regards, dan carpenter