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ALSA: pcm: Fix ioctls for X32 ABI
X32 ABI uses the 64bit timespec in addition to 64bit alignment of 64bit values. This leads to incompatibilities in some PCM ioctls involved with snd_pcm_channel_info, snd_pcm_status and snd_pcm_sync_ptr structs. Fix the PCM compat ABI for these ioctls like the previous commit for ctl API. Reported-by: Steven Newbury <steve@snewbury.org.uk> Cc: <stable@vger.kernel.org> # v3.4+ Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
parent
6236d8bb2a
commit
513ace79b6
@ -183,6 +183,14 @@ static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream
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return err;
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}
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#ifdef CONFIG_X86_X32
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/* X32 ABI has the same struct as x86-64 for snd_pcm_channel_info */
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static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
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struct snd_pcm_channel_info __user *src);
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#define snd_pcm_ioctl_channel_info_x32(s, p) \
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snd_pcm_channel_info_user(s, p)
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#endif /* CONFIG_X86_X32 */
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struct snd_pcm_status32 {
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s32 state;
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struct compat_timespec trigger_tstamp;
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@ -243,6 +251,71 @@ static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
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return err;
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}
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#ifdef CONFIG_X86_X32
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/* X32 ABI has 64bit timespec and 64bit alignment */
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struct snd_pcm_status_x32 {
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s32 state;
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u32 rsvd; /* alignment */
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struct timespec trigger_tstamp;
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struct timespec tstamp;
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u32 appl_ptr;
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u32 hw_ptr;
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s32 delay;
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u32 avail;
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u32 avail_max;
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u32 overrange;
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s32 suspended_state;
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u32 audio_tstamp_data;
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struct timespec audio_tstamp;
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struct timespec driver_tstamp;
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u32 audio_tstamp_accuracy;
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unsigned char reserved[52-2*sizeof(struct timespec)];
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} __packed;
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#define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
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static int snd_pcm_status_user_x32(struct snd_pcm_substream *substream,
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struct snd_pcm_status_x32 __user *src,
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bool ext)
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{
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struct snd_pcm_status status;
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int err;
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memset(&status, 0, sizeof(status));
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/*
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* with extension, parameters are read/write,
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* get audio_tstamp_data from user,
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* ignore rest of status structure
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*/
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if (ext && get_user(status.audio_tstamp_data,
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(u32 __user *)(&src->audio_tstamp_data)))
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return -EFAULT;
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err = snd_pcm_status(substream, &status);
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if (err < 0)
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return err;
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if (clear_user(src, sizeof(*src)))
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return -EFAULT;
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if (put_user(status.state, &src->state) ||
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put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
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put_timespec(&status.tstamp, &src->tstamp) ||
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put_user(status.appl_ptr, &src->appl_ptr) ||
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put_user(status.hw_ptr, &src->hw_ptr) ||
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put_user(status.delay, &src->delay) ||
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put_user(status.avail, &src->avail) ||
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put_user(status.avail_max, &src->avail_max) ||
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put_user(status.overrange, &src->overrange) ||
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put_user(status.suspended_state, &src->suspended_state) ||
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put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
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put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
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put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
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put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
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return -EFAULT;
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return err;
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}
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#endif /* CONFIG_X86_X32 */
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/* both for HW_PARAMS and HW_REFINE */
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static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
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int refine,
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@ -469,6 +542,93 @@ static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
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return 0;
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}
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#ifdef CONFIG_X86_X32
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/* X32 ABI has 64bit timespec and 64bit alignment */
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struct snd_pcm_mmap_status_x32 {
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s32 state;
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s32 pad1;
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u32 hw_ptr;
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u32 pad2; /* alignment */
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struct timespec tstamp;
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s32 suspended_state;
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struct timespec audio_tstamp;
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} __packed;
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struct snd_pcm_mmap_control_x32 {
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u32 appl_ptr;
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u32 avail_min;
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};
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struct snd_pcm_sync_ptr_x32 {
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u32 flags;
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u32 rsvd; /* alignment */
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union {
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struct snd_pcm_mmap_status_x32 status;
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unsigned char reserved[64];
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} s;
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union {
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struct snd_pcm_mmap_control_x32 control;
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unsigned char reserved[64];
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} c;
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} __packed;
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static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
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struct snd_pcm_sync_ptr_x32 __user *src)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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volatile struct snd_pcm_mmap_status *status;
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volatile struct snd_pcm_mmap_control *control;
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u32 sflags;
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struct snd_pcm_mmap_control scontrol;
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struct snd_pcm_mmap_status sstatus;
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snd_pcm_uframes_t boundary;
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int err;
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if (snd_BUG_ON(!runtime))
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return -EINVAL;
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if (get_user(sflags, &src->flags) ||
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get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
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get_user(scontrol.avail_min, &src->c.control.avail_min))
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return -EFAULT;
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if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
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err = snd_pcm_hwsync(substream);
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if (err < 0)
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return err;
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}
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status = runtime->status;
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control = runtime->control;
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boundary = recalculate_boundary(runtime);
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if (!boundary)
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boundary = 0x7fffffff;
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snd_pcm_stream_lock_irq(substream);
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/* FIXME: we should consider the boundary for the sync from app */
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if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
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control->appl_ptr = scontrol.appl_ptr;
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else
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scontrol.appl_ptr = control->appl_ptr % boundary;
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if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
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control->avail_min = scontrol.avail_min;
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else
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scontrol.avail_min = control->avail_min;
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sstatus.state = status->state;
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sstatus.hw_ptr = status->hw_ptr % boundary;
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sstatus.tstamp = status->tstamp;
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sstatus.suspended_state = status->suspended_state;
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sstatus.audio_tstamp = status->audio_tstamp;
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snd_pcm_stream_unlock_irq(substream);
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if (put_user(sstatus.state, &src->s.status.state) ||
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put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
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put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
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put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
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put_timespec(&sstatus.audio_tstamp, &src->s.status.audio_tstamp) ||
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put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
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put_user(scontrol.avail_min, &src->c.control.avail_min))
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return -EFAULT;
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return 0;
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}
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#endif /* CONFIG_X86_X32 */
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/*
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*/
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@ -487,7 +647,12 @@ enum {
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SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
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SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
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SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
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#ifdef CONFIG_X86_X32
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SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
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SNDRV_PCM_IOCTL_STATUS_X32 = _IOR('A', 0x20, struct snd_pcm_status_x32),
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SNDRV_PCM_IOCTL_STATUS_EXT_X32 = _IOWR('A', 0x24, struct snd_pcm_status_x32),
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SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
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#endif /* CONFIG_X86_X32 */
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};
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static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
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@ -559,6 +724,16 @@ static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned l
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return snd_pcm_ioctl_rewind_compat(substream, argp);
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case SNDRV_PCM_IOCTL_FORWARD32:
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return snd_pcm_ioctl_forward_compat(substream, argp);
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#ifdef CONFIG_X86_X32
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case SNDRV_PCM_IOCTL_STATUS_X32:
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return snd_pcm_status_user_x32(substream, argp, false);
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case SNDRV_PCM_IOCTL_STATUS_EXT_X32:
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return snd_pcm_status_user_x32(substream, argp, true);
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case SNDRV_PCM_IOCTL_SYNC_PTR_X32:
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return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
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case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
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return snd_pcm_ioctl_channel_info_x32(substream, argp);
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#endif /* CONFIG_X86_X32 */
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}
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return -ENOIOCTLCMD;
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