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platform/x86: dell-privacy: Fix race condition

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Accessing priv->features_present needs to happen with the list mutex
being held, otherwise priv can be freed at any moment.

Fixes: 8af9fa37b8 ("platform/x86: dell-privacy: Add support for Dell hardware privacy")
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://patch.msgid.link/20260612173451.467629-2-W_Armin@gmx.de
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Armin Wolf 2026-06-12 19:34:48 +02:00 committed by Ilpo Järvinen
parent dcabd63cd1
commit ca9338dbc6
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GPG Key ID: 59AC4F6153E5CE31
1 changed files with 2 additions and 2 deletions
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4
drivers/platform/x86/dell/dell-wmi-privacy.c
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@ -92,11 +92,11 @@ bool dell_privacy_has_mic_mute(void)
{
struct privacy_wmi_data *priv;
mutex_lock(&list_mutex);
guard(mutex)(&list_mutex);
priv = list_first_entry_or_null(&wmi_list,
struct privacy_wmi_data,
list);
mutex_unlock(&list_mutex);
return priv && (priv->features_present & BIT(DELL_PRIVACY_TYPE_AUDIO));
}