CVE-2025-38335
Description
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.
How to fix
- linux linux_kernel5.15.190, 6.1.148, 6.6.101, 6.12.41, 6.15.4 or later
- git.kernel.org/stable/c/664e5a6f541ff226621487d1280d2ec28e86be28
- git.kernel.org/stable/c/a7b79db25846459de63ca8974268f0c41c734c4b
- git.kernel.org/stable/c/a8f01e51109f77229e426b57c5d19251b462c6aa
- git.kernel.org/stable/c/ec8f5da79b425deef5aebacdd4fe645620cd4f0b
- git.kernel.org/stable/c/f4a8f561d08e39f7833d4a278ebfb12a41eef15f
- git.kernel.org/stable/c/fa53beab4740c4e5fe969f218a379f9558be33dc
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.13 ≤ v < 5.15.190, 5.16 ≤ v < 6.1.148, 6.2 ≤ v < 6.6.101, 6.7 ≤ v < 6.12.41, 6.13 ≤ v < 6.15.4 | 5.15.190, 6.1.148, 6.6.101, 6.12.41, 6.15.4 |
| debian debian_linux | 11.0 | — |
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