6.12-stable review patch. If anyone has any objections, please let me know.
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From: Gatien Chevallier gatien.chevallier@foss.st.com
commit 8f38219fa139623c29db2cb0f17d0a197a86e344 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/input/keyboard/gpio_keys.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/input/keyboard/gpio_keys.c +++ b/drivers/input/keyboard/gpio_keys.c @@ -449,6 +449,8 @@ static enum hrtimer_restart gpio_keys_ir 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);