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[23.88.128.2]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-435570ad8f4sm12296325fac.4.2026.05.12.05.03.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 May 2026 05:03:57 -0700 (PDT) From: Maxwell Doose To: jic23@kernel.org Cc: David Lechner , =?UTF-8?q?Nuno=20S=C3=A1?= , Andy Shevchenko , Daniel Baluta , linux-iio@vger.kernel.org (open list:IIO SUBSYSTEM AND DRIVERS), linux-kernel@vger.kernel.org (open list) Subject: [PATCH] iio: imu: kmx61: Fix TOCTOU race condition Date: Tue, 12 May 2026 07:03:55 -0500 Message-ID: <20260512120356.40839-1-m32285159@gmail.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit A Time-of-check to Time-of-use race condition is present in kmx61_write_event_config(). Move the mutex_lock() call above it to fix it. Fixes: fd3ae7a9f21c ("iio: imu: kmx61: Add support for any motion trigger") Signed-off-by: Maxwell Doose --- drivers/iio/imu/kmx61.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/iio/imu/kmx61.c b/drivers/iio/imu/kmx61.c index 3cd91d8a89ee..9aa00acc7f14 100644 --- a/drivers/iio/imu/kmx61.c +++ b/drivers/iio/imu/kmx61.c @@ -942,11 +942,13 @@ static int kmx61_write_event_config(struct iio_dev *indio_dev, struct kmx61_data *data = kmx61_get_data(indio_dev); int ret = 0; - if (state && data->ev_enable_state) - return 0; - mutex_lock(&data->lock); + if (state && data->ev_enable_state) { + ret = 0; + goto err_unlock; + } + if (!state && data->motion_trig_on) { data->ev_enable_state = false; goto err_unlock; -- 2.54.0