The patch below does not apply to the 5.15-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-5.15.y git checkout FETCH_HEAD git cherry-pick -x 8f38219fa139623c29db2cb0f17d0a197a86e344 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025062003-wizard-hamstring-172d@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

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

From 8f38219fa139623c29db2cb0f17d0a197a86e344 Mon Sep 17 00:00:00 2001 From: Gatien Chevallier gatien.chevallier@foss.st.com Date: Fri, 30 May 2025 16:09:23 -0700 Subject: [PATCH] Input: gpio-keys - fix possible concurrent access in gpio_keys_irq_timer()

gpio_keys_irq_isr() and gpio_keys_irq_timer() access the same resources. There could be a concurrent access if a GPIO interrupt occurs in parallel of a HR timer interrupt.

Guard back those resources with a spinlock.

Fixes: 019002f20cb5 ("Input: gpio-keys - use hrtimer for release timer") Signed-off-by: Gatien Chevallier gatien.chevallier@foss.st.com Link: https://lore.kernel.org/r/20250528-gpio_keys_preempt_rt-v2-2-3fc55a9c3619@fo... Cc: stable@vger.kernel.org Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c index d884538107c9..f9db86da0818 100644 --- a/drivers/input/keyboard/gpio_keys.c +++ b/drivers/input/keyboard/gpio_keys.c @@ -449,6 +449,8 @@ static enum hrtimer_restart gpio_keys_irq_timer(struct hrtimer *t) release_timer); struct input_dev *input = bdata->input;

+ guard(spinlock_irqsave)(&bdata->lock); + if (bdata->key_pressed) { input_report_key(input, *bdata->code, 0); input_sync(input);