sound/soc/sof/ipc4-mtrace.c:359 sof_ipc4_priority_mask_dfs_write() warn: potential spectre issue 'priv->state_info.logs_priorities_mask' [w] (local cap)

sound/soc/sof/ipc4-mtrace.c:359 sof_ipc4_priority_mask_dfs_write() warn: potential spectre issue 'priv->state_info.logs_priorities_mask' [w] (local cap)

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
CC: Mark Brown <broonie@kernel.org>
CC: Rander Wang <rander.wang@intel.com>
CC: Bard Liao <yung-chuan.liao@linux.intel.com>
CC: "Pierre-Louis Bossart" <pierre-louis.bossart@linux.intel.com>
CC: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   fff5a5e7f528b2ed2c335991399a766c2cf01103
commit: f4ea22f7aa7536560097d765be56445933d07e0d ASoC: SOF: ipc4: Add support for mtrace log extraction
date:   6 months ago
:::::: branch date: 6 hours ago
:::::: commit date: 6 months ago
config: s390-randconfig-m031-20230321 (https://download.01.org/0day-ci/archive/20230323/202303231129.YxVuUvO2-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 12.1.0

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Link: https://lore.kernel.org/r/202303231129.YxVuUvO2-lkp@intel.com/

smatch warnings:
sound/soc/sof/ipc4-mtrace.c:359 sof_ipc4_priority_mask_dfs_write() warn: potential spectre issue 'priv->state_info.logs_priorities_mask' [w] (local cap)

vim +359 sound/soc/sof/ipc4-mtrace.c

f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  326  
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  327  static ssize_t sof_ipc4_priority_mask_dfs_write(struct file *file,
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  328  						const char __user *from,
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  329  						size_t count, loff_t *ppos)
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  330  {
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  331  	struct sof_mtrace_priv *priv = file->private_data;
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  332  	int id, ret;
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  333  	char *buf;
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  334  	u32 mask;
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  335  
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  336  	/*
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  337  	 * To update Nth mask entry, write:
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  338  	 * "N,0x1234" or "N,1234" to the debugfs file
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  339  	 * The mask will be interpreted as hexadecimal number
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  340  	 */
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  341  	buf = memdup_user_nul(from, count);
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  342  	if (IS_ERR(buf))
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  343  		return PTR_ERR(buf);
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  344  
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  345  	ret = sscanf(buf, "%d,0x%x", &id, &mask);
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  346  	if (ret != 2) {
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  347  		ret = sscanf(buf, "%d,%x", &id, &mask);
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  348  		if (ret != 2) {
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  349  			ret = -EINVAL;
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  350  			goto out;
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  351  		}
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  352  	}
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  353  
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  354  	if (id >= MAX_ALLOWED_LIBRARIES) {
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  355  		ret = -EINVAL;
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  356  		goto out;
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  357  	}
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  358  
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09 @359  	priv->state_info.logs_priorities_mask[id] = mask;
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  360  	ret = count;
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  361  
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  362  out:
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  363  	kfree(buf);
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  364  	return ret;
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  365  }
f4ea22f7aa7536 Peter Ujfalusi 2022-09-09  366  

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