From 411b8c4b274737c3bf08e1e025801161603cfffc Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Fri, 22 May 2026 10:29:04 -0700 Subject: [PATCH] Input: ims-pcu - fix race condition in reset_device sysfs callback The ims_pcu_reset_device() sysfs callback calls ims_pcu_execute_command() without acquiring pcu->cmd_mutex. This can lead to data races and corruption of the shared command buffer if triggered concurrently with other commands. Acquire pcu->cmd_mutex before calling ims_pcu_execute_command(). Fixes: 628329d52474 ("Input: add IMS Passenger Control Unit driver") Cc: stable@vger.kernel.org Reported-by: Sashiko bot Assisted-by: Gemini:gemini-3.1-pro Signed-off-by: Dmitry Torokhov --- drivers/input/misc/ims-pcu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/input/misc/ims-pcu.c b/drivers/input/misc/ims-pcu.c index 4f8265c0772f..39bc02ef3e53 100644 --- a/drivers/input/misc/ims-pcu.c +++ b/drivers/input/misc/ims-pcu.c @@ -1153,6 +1153,8 @@ static ssize_t ims_pcu_reset_device(struct device *dev, dev_info(pcu->dev, "Attempting to reset device\n"); + guard(mutex)(&pcu->cmd_mutex); + error = ims_pcu_execute_command(pcu, PCU_RESET, &reset_byte, 1); if (error) { dev_info(pcu->dev,