linux-stable-mirror

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2026-04-03 12:05:13 +02:00

Files

Johan Hovold bae74771fc ASoC: stm32: sai: fix OF node leak on probe

commit 23261f0de0 upstream.

The reference taken to the sync provider OF node when probing the
platform device is currently only dropped if the set_sync() callback
fails during DAI probe.

Make sure to drop the reference on platform probe failures (e.g. probe
deferral) and on driver unbind.

This also avoids a potential use-after-free in case the DAI is ever
reprobed without first rebinding the platform driver.

Fixes: 5914d285f6 ("ASoC: stm32: sai: Add synchronization support")
Fixes: d4180b4c02 ("ASoC: stm32: sai: fix set_sync service")
Cc: Olivier Moysan <olivier.moysan@st.com>
Cc: stable@vger.kernel.org      # 4.16: d4180b4c02
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: olivier moysan <olivier.moysan@foss.st.com>
Link: https://patch.msgid.link/20251124104908.15754-4-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>