---
id: CVE-2025-38335
title: 'Input: gpio-keys - fix a sleep while atomic with PREEMPT_RT'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Input: gpio-keys - fix a sleep while atomic with PREEMPT_RT

  When enabling PREEMPT_RT, the gpio_keys_irq_timer() callback runs in
  hard irq context, but the input_event(…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 019002f20cb5b9f78d39360aff244265d035e08a <
    664e5a6f541ff226621487d1280d2ec28e86be28
  - >-
    Linux >= 019002f20cb5b9f78d39360aff244265d035e08a <
    a8f01e51109f77229e426b57c5d19251b462c6aa
  - >-
    Linux >= 019002f20cb5b9f78d39360aff244265d035e08a <
    fa53beab4740c4e5fe969f218a379f9558be33dc
  - >-
    Linux >= 019002f20cb5b9f78d39360aff244265d035e08a <
    a7b79db25846459de63ca8974268f0c41c734c4b
  - >-
    Linux >= 019002f20cb5b9f78d39360aff244265d035e08a <
    ec8f5da79b425deef5aebacdd4fe645620cd4f0b
  - >-
    Linux >= 019002f20cb5b9f78d39360aff244265d035e08a <
    f4a8f561d08e39f7833d4a278ebfb12a41eef15f
  - Linux 5.13
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:54:47.420777Z'
published: '2025-07-10'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:02:33.650Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-38335'
references:
  - url: 'https://git.kernel.org/stable/c/664e5a6f541ff226621487d1280d2ec28e86be28'
  - url: 'https://git.kernel.org/stable/c/a8f01e51109f77229e426b57c5d19251b462c6aa'
  - url: 'https://git.kernel.org/stable/c/fa53beab4740c4e5fe969f218a379f9558be33dc'
  - url: 'https://git.kernel.org/stable/c/a7b79db25846459de63ca8974268f0c41c734c4b'
  - url: 'https://git.kernel.org/stable/c/ec8f5da79b425deef5aebacdd4fe645620cd4f0b'
  - url: 'https://git.kernel.org/stable/c/f4a8f561d08e39f7833d4a278ebfb12a41eef15f'
tags:
  - cve.org
epss: 0.00139
epssPercentile: 0.03309
ingestedAt: '2026-11-05T22:38:31.956Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

Input: gpio-keys - fix a sleep while atomic with PREEMPT_RT

When enabling PREEMPT_RT, the gpio_keys_irq_timer() callback runs in
hard irq context, but the input_event() takes a spin_lock, which isn't
allowed there as it is converted to a rt_spin_lock().

[ 4054.289999] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48
[ 4054.290028] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/0
...
[ 4054.290195]  __might_resched+0x13c/0x1f4
[ 4054.290209]  rt_spin_lock+0x54/0x11c
[ 4054.290219]  input_event+0x48/0x80
[ 4054.290230]  gpio_keys_irq_timer+0x4c/0x78
[ 4054.290243]  __hrtimer_run_queues+0x1a4/0x438
[ 4054.290257]  hrtimer_interrupt+0xe4/0x240
[ 4054.290269]  arch_timer_handler_phys+0x2c/0x44
[ 4054.290283]  handle_percpu_devid_irq+0x8c/0x14c
[ 4054.290297]  handle_irq_desc+0x40/0x58
[ 4054.290307]  generic_handle_domain_irq+0x1c/0x28
[ 4054.290316]  gic_handle_irq+0x44/0xcc

Considering the gpio_keys_irq_isr() can run in any context, e.g. it can
be threaded, it seems there's no point in requesting the timer isr to
run in hard irq context.

Relax the hrtimer not to use the hard context.

## Affected

- `Linux >= 019002f20cb5b9f78d39360aff244265d035e08a < 664e5a6f541ff226621487d1280d2ec28e86be28`
- `Linux >= 019002f20cb5b9f78d39360aff244265d035e08a < a8f01e51109f77229e426b57c5d19251b462c6aa`
- `Linux >= 019002f20cb5b9f78d39360aff244265d035e08a < fa53beab4740c4e5fe969f218a379f9558be33dc`
- `Linux >= 019002f20cb5b9f78d39360aff244265d035e08a < a7b79db25846459de63ca8974268f0c41c734c4b`
- `Linux >= 019002f20cb5b9f78d39360aff244265d035e08a < ec8f5da79b425deef5aebacdd4fe645620cd4f0b`
- `Linux >= 019002f20cb5b9f78d39360aff244265d035e08a < f4a8f561d08e39f7833d4a278ebfb12a41eef15f`
- `Linux 5.13`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.