[tiwai-sound:for-next 23/38] sound/core/pcm_compat.c:423 snd_pcm_ioctl_sync_ptr_x32() error: uninitialized symbol 'sflags'.

[tiwai-sound:for-next 23/38] sound/core/pcm_compat.c:423 snd_pcm_ioctl_sync_ptr_x32() error: uninitialized symbol 'sflags'.

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: alsa-devel@alsa-project.org
TO: Christophe Leroy <christophe.leroy@csgroup.eu>
CC: Takashi Iwai <tiwai@suse.de>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next
head:   66b338d006d75ab52b16bf05a7f4f451043199bf
commit: a9b49bf8ad5905ebd999da345dcff3b9fad43877 [23/38] ALSA: pcm: Convert SNDRV_PCM_IOCTL_SYNC_PTR to user_access_begin/user_access_end()
:::::: branch date: 15 hours ago
:::::: commit date: 2 weeks ago
config: x86_64-randconfig-161-20250630 (https://download.01.org/0day-ci/archive/20250701/202507011031.wWzbWNZP-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202507011031.wWzbWNZP-lkp@intel.com/

New smatch warnings:
sound/core/pcm_compat.c:423 snd_pcm_ioctl_sync_ptr_x32() error: uninitialized symbol 'sflags'.

Old smatch warnings:
sound/core/pcm_native.c:3210 snd_pcm_ioctl_sync_ptr_compat() error: uninitialized symbol 'sflags'.
sound/core/pcm_compat.c:21 snd_pcm_ioctl_delay_compat() error: uninitialized symbol 'delay'.

vim +/sflags +423 sound/core/pcm_compat.c

513ace79b657e2 Takashi Iwai     2016-02-28  405  
513ace79b657e2 Takashi Iwai     2016-02-28  406  static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
513ace79b657e2 Takashi Iwai     2016-02-28  407  				      struct snd_pcm_sync_ptr_x32 __user *src)
513ace79b657e2 Takashi Iwai     2016-02-28  408  {
513ace79b657e2 Takashi Iwai     2016-02-28  409  	struct snd_pcm_runtime *runtime = substream->runtime;
513ace79b657e2 Takashi Iwai     2016-02-28  410  	volatile struct snd_pcm_mmap_status *status;
513ace79b657e2 Takashi Iwai     2016-02-28  411  	volatile struct snd_pcm_mmap_control *control;
513ace79b657e2 Takashi Iwai     2016-02-28  412  	u32 sflags;
513ace79b657e2 Takashi Iwai     2016-02-28  413  	struct snd_pcm_mmap_control scontrol;
513ace79b657e2 Takashi Iwai     2016-02-28  414  	struct snd_pcm_mmap_status sstatus;
513ace79b657e2 Takashi Iwai     2016-02-28  415  	snd_pcm_uframes_t boundary;
513ace79b657e2 Takashi Iwai     2016-02-28  416  	int err;
513ace79b657e2 Takashi Iwai     2016-02-28  417  
513ace79b657e2 Takashi Iwai     2016-02-28  418  	if (snd_BUG_ON(!runtime))
513ace79b657e2 Takashi Iwai     2016-02-28  419  		return -EINVAL;
513ace79b657e2 Takashi Iwai     2016-02-28  420  
2acd83beb4d3fd Christophe Leroy 2025-06-14  421  	if (snd_pcm_sync_ptr_get_user(sflags, scontrol, src))
513ace79b657e2 Takashi Iwai     2016-02-28  422  		return -EFAULT;
513ace79b657e2 Takashi Iwai     2016-02-28 @423  	if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
513ace79b657e2 Takashi Iwai     2016-02-28  424  		err = snd_pcm_hwsync(substream);
513ace79b657e2 Takashi Iwai     2016-02-28  425  		if (err < 0)
513ace79b657e2 Takashi Iwai     2016-02-28  426  			return err;
513ace79b657e2 Takashi Iwai     2016-02-28  427  	}
513ace79b657e2 Takashi Iwai     2016-02-28  428  	status = runtime->status;
513ace79b657e2 Takashi Iwai     2016-02-28  429  	control = runtime->control;
513ace79b657e2 Takashi Iwai     2016-02-28  430  	boundary = recalculate_boundary(runtime);
513ace79b657e2 Takashi Iwai     2016-02-28  431  	if (!boundary)
513ace79b657e2 Takashi Iwai     2016-02-28  432  		boundary = 0x7fffffff;
650224fe8d5f6d Takashi Iwai     2024-02-27  433  	scoped_guard(pcm_stream_lock_irq, substream) {
513ace79b657e2 Takashi Iwai     2016-02-28  434  		/* FIXME: we should consider the boundary for the sync from app */
513ace79b657e2 Takashi Iwai     2016-02-28  435  		if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
513ace79b657e2 Takashi Iwai     2016-02-28  436  			control->appl_ptr = scontrol.appl_ptr;
513ace79b657e2 Takashi Iwai     2016-02-28  437  		else
513ace79b657e2 Takashi Iwai     2016-02-28  438  			scontrol.appl_ptr = control->appl_ptr % boundary;
513ace79b657e2 Takashi Iwai     2016-02-28  439  		if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
513ace79b657e2 Takashi Iwai     2016-02-28  440  			control->avail_min = scontrol.avail_min;
513ace79b657e2 Takashi Iwai     2016-02-28  441  		else
513ace79b657e2 Takashi Iwai     2016-02-28  442  			scontrol.avail_min = control->avail_min;
513ace79b657e2 Takashi Iwai     2016-02-28  443  		sstatus.state = status->state;
513ace79b657e2 Takashi Iwai     2016-02-28  444  		sstatus.hw_ptr = status->hw_ptr % boundary;
513ace79b657e2 Takashi Iwai     2016-02-28  445  		sstatus.tstamp = status->tstamp;
513ace79b657e2 Takashi Iwai     2016-02-28  446  		sstatus.suspended_state = status->suspended_state;
513ace79b657e2 Takashi Iwai     2016-02-28  447  		sstatus.audio_tstamp = status->audio_tstamp;
650224fe8d5f6d Takashi Iwai     2024-02-27  448  	}
a25684a956468e Takashi Iwai     2021-10-17  449  	if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
a25684a956468e Takashi Iwai     2021-10-17  450  		snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE);
2acd83beb4d3fd Christophe Leroy 2025-06-14  451  	if (snd_pcm_sync_ptr_put_user(sstatus, scontrol, src))
513ace79b657e2 Takashi Iwai     2016-02-28  452  		return -EFAULT;
513ace79b657e2 Takashi Iwai     2016-02-28  453  
513ace79b657e2 Takashi Iwai     2016-02-28  454  	return 0;
513ace79b657e2 Takashi Iwai     2016-02-28  455  }
83a44a4f47ad20 Masahiro Yamada  2022-03-14  456  #endif /* CONFIG_X86_X32_ABI */
^1da177e4c3f41 Linus Torvalds   2005-04-16  457  

:::::: The code at line 423 was first introduced by commit
:::::: 513ace79b657e2022a592e77f24074e088681ecc ALSA: pcm: Fix ioctls for X32 ABI

:::::: TO: Takashi Iwai <tiwai@suse.de>
:::::: CC: Takashi Iwai <tiwai@suse.de>

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