The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x 79c81d137d36f9635bbcbc3916c0cccb418a61dd # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '16781817142619@kroah.com' --subject-prefix 'PATCH 4.19.y' HEAD^..

Possible dependencies:

79c81d137d36 ("Input: exc3000 - properly stop timer on shutdown") a63d0120a2dd ("Input: exc3000 - split MT event handling from IRQ handler") d862a3068ea5 ("Input: exc3000 - add support to query model and fw_version") 3bdd21c6937a ("Input: exc3000 - add EXC80H60 and EXC80H84 support") 1053653ffadb ("dt-bindings: touchscreen: Convert EETI EXC3000 touchscreen to json-schema") deae576455bb ("Input: exc3000 - switch to i2c's probe_new API")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 79c81d137d36f9635bbcbc3916c0cccb418a61dd Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov dmitry.torokhov@gmail.com Date: Fri, 3 Feb 2023 16:43:29 -0800 Subject: [PATCH] Input: exc3000 - properly stop timer on shutdown

We need to stop the timer on driver unbind or probe failures, otherwise we get UAF/Oops.

Fixes: 7e577a17f2ee ("Input: add I2C attached EETI EXC3000 multi touch driver") Reported-by: "Stahl, Michael" mstahl@moba.de Link: https://lore.kernel.org/r/Y9dK57BFqtlf8NmN@google.com Cc: stable@vger.kernel.org Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com

diff --git a/drivers/input/touchscreen/exc3000.c b/drivers/input/touchscreen/exc3000.c index 4b7eee01c6aa..69eae79e2087 100644 --- a/drivers/input/touchscreen/exc3000.c +++ b/drivers/input/touchscreen/exc3000.c @@ -109,6 +109,11 @@ static inline void exc3000_schedule_timer(struct exc3000_data *data) mod_timer(&data->timer, jiffies + msecs_to_jiffies(EXC3000_TIMEOUT_MS)); }

+static void exc3000_shutdown_timer(void *timer) +{ + timer_shutdown_sync(timer); +} + static int exc3000_read_frame(struct exc3000_data *data, u8 *buf) { struct i2c_client *client = data->client; @@ -386,6 +391,11 @@ static int exc3000_probe(struct i2c_client *client) if (error) return error;

+ error = devm_add_action_or_reset(&client->dev, exc3000_shutdown_timer, + &data->timer); + if (error) + return error; + error = devm_request_threaded_irq(&client->dev, client->irq, NULL, exc3000_interrupt, IRQF_ONESHOT, client->name, data);