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    <link>https://cve.radiocsirt.org</link>
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    <lastBuildDate>Thu, 08 Oct 2026 11:47:45 +0000</lastBuildDate>
    <item>
      <title>CVE-2025-38335 — Input: gpio-keys - fix a sleep while atomic with PREEMPT_RT</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2025-38335</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;Input: gpio-keys - fix a sleep while atomic with PREEMPT_RT&lt;/p&gt;
&lt;p&gt;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&amp;#39;t
allowed there as it is converted to a rt_spin_lock().&lt;/p&gt;
&lt;p&gt;[ 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&lt;/p&gt;
&lt;p&gt;Considering the gpio_keys_irq_isr() can run in any context, e.g. it can
be threaded, it seems there&amp;#39;s no point in requesting the timer isr to
run in hard irq context.&lt;/p&gt;
&lt;p&gt;Relax the hrtimer not to use the hard context.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;Input: gpio-keys - fix a sleep while atomic with PREEMPT_RT&lt;/p&gt;
&lt;p&gt;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&amp;#39;t
allowed there as it is converted to a rt_spin_lock().&lt;/p&gt;
&lt;p&gt;[ 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&lt;/p&gt;
&lt;p&gt;Considering the gpio_keys_irq_isr() can run in any context, e.g. it can
be threaded, it seems there&amp;#39;s no point in requesting the timer isr to
run in hard irq context.&lt;/p&gt;
&lt;p&gt;Relax the hrtimer not to use the hard context.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2025-38335</guid>
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