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CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-42274

Revert "ALSA: firewire-lib: operate for period elapse event in process context"

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: Revert "ALSA: firewire-lib: operate for period elapse event in process context" Commit 7ba5ca32fe6e ("ALSA: firewire-lib: operate for period elapse event in process context") removed the process context workqueue from amdtp_domain_stream_pcm_pointer() and update_pcm_pointers() to remove its overhead. With RME Fireface 800, this lead to a regression since Kernels 5.14.0, causing an AB/BA deadlock competition for the substream lock with eventual system freeze under ALSA operation: thread 0: * (lock A) acquire substream lock by snd_pcm_stream_lock_irq() in snd_pcm_status64() * (lock B) wait for tasklet to finish by calling tasklet_unlock_spin_wait() in tasklet_disable_in_atomic() in ohci_flush_iso_completions() of ohci.c thread 1: * (lock B) enter tasklet * (lock A) attempt to acquire substream lock, waiting for it to be released: snd_pcm_stream_lock_irqsave() in snd_pcm_period_elapsed() in update_pcm_pointers() in process_ctx_payloads() in process_rx_packets() of amdtp-stream.c ? tasklet_unlock_spin_wait </NMI> <TASK> ohci_flush_iso_completions firewire_ohci amdtp_domain_stream_pcm_pointer snd_firewire_lib snd_pcm_update_hw_ptr0 snd_pcm snd_pcm_status64 snd_pcm ? native_queued_spin_lock_slowpath </NMI> <IRQ> _raw_spin_lock_irqsave snd_pcm_period_elapsed snd_pcm process_rx_packets snd_firewire_lib irq_target_callback snd_firewire_lib handle_it_packet firewire_ohci context_tasklet firewire_ohci Restore the process context work queue to prevent deadlock AB/BA deadlock competition for ALSA substream lock of snd_pcm_stream_lock_irq() in snd_pcm_status64() and snd_pcm_stream_lock_irqsave() in snd_pcm_period_elapsed(). revert commit 7ba5ca32fe6e ("ALSA: firewire-lib: operate for period elapse event in process context") Replace inline description to prevent future deadlock.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 7ba5ca32fe6e8d2e153fb5602997336517b34743 to < 7c07220cf634002f93a87ca2252a32766850f2d1affected
  • 7ba5ca32fe6e8d2e153fb5602997336517b34743 to < b239a37d68e8bc59f9516444da222841e3b13ba9affected
  • 7ba5ca32fe6e8d2e153fb5602997336517b34743 to < f5043e69aeb2786f32e84132817a007a6430aa7daffected
  • 7ba5ca32fe6e8d2e153fb5602997336517b34743 to < 36c255db5a25edd42d1aca48e38b8e95ee5fd9efaffected
  • 7ba5ca32fe6e8d2e153fb5602997336517b34743 to < 3dab73ab925a51ab05543b491bf17463a48ca323affected

Linux Linux

Default version status: affected

  • 5.14affected
  • 0 to < 5.14unaffected
  • 5.15.165 to ≤ 5.15.*unaffected
  • 6.1.104 to ≤ 6.1.*unaffected
  • 6.6.45 to ≤ 6.6.*unaffected
  • 6.10.4 to ≤ 6.10.*unaffected
  • 6.11 to ≤ *unaffected

References