CVE-2021-47424

i40e: Fix freeing of uninitialized misc IRQ vector

State: Published
Severity: Not scored
Published: May 21, 2024
Updated: May 11, 2026
Reserved: May 21, 2024

Description

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

i40e: Fix freeing of uninitialized misc IRQ vector

When VSI set up failed in i40e_probe() as part of PF switch set up driver was trying to free misc IRQ vectors in i40e_clear_interrupt_scheme and produced a kernel Oops:

Trying to free already-free IRQ 266 WARNING: CPU: 0 PID: 5 at kernel/irq/manage.c:1731 __free_irq+0x9a/0x300 Workqueue: events work_for_cpu_fn RIP: 0010:__free_irq+0x9a/0x300 Call Trace: ? synchronize_irq+0x3a/0xa0 free_irq+0x2e/0x60 i40e_clear_interrupt_scheme+0x53/0x190 [i40e] i40e_probe.part.108+0x134b/0x1a40 [i40e] ? kmem_cache_alloc+0x158/0x1c0 ? acpi_ut_update_ref_count.part.1+0x8e/0x345 ? acpi_ut_update_object_reference+0x15e/0x1e2 ? strstr+0x21/0x70 ? irq_get_irq_data+0xa/0x20 ? mp_check_pin_attr+0x13/0xc0 ? irq_get_irq_data+0xa/0x20 ? mp_map_pin_to_irq+0xd3/0x2f0 ? acpi_register_gsi_ioapic+0x93/0x170 ? pci_conf1_read+0xa4/0x100 ? pci_bus_read_config_word+0x49/0x70 ? do_pci_enable_device+0xcc/0x100 local_pci_probe+0x41/0x90 work_for_cpu_fn+0x16/0x20 process_one_work+0x1a7/0x360 worker_thread+0x1cf/0x390 ? create_worker+0x1a0/0x1a0 kthread+0x112/0x130 ? kthread_flush_work_fn+0x10/0x10 ret_from_fork+0x1f/0x40

The problem is that at that point misc IRQ vectors were not allocated yet and we get a call trace that driver is trying to free already free IRQ vectors.

Add a check in i40e_clear_interrupt_scheme for __I40E_MISC_IRQ_REQUESTED PF state before calling i40e_free_misc_vector. This state is set only if misc IRQ vectors were properly initialized.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	c17401a1dd210a5f22ab1ec7c7366037c158a14c to before 60ad4cde0ad28921f9ea25b0201c774b95ffa4b4Affected c17401a1dd210a5f22ab1ec7c7366037c158a14c to before 17063cac4088b8e2fc0f633abddca5426ed58312Affected c17401a1dd210a5f22ab1ec7c7366037c158a14c to before 97aeed72af4f83ae51534f0a2473ff52f8d66236Affected c17401a1dd210a5f22ab1ec7c7366037c158a14c to before 75099439209d3cda439a1d9b00d19a50f0066fefAffected c17401a1dd210a5f22ab1ec7c7366037c158a14c to before 2e5a20573a926302b233b0c2e1077f5debc7ab2eAffected
LinuxLinux	4.15Affected before 4.15Not affected 4.19.211 through 4.19.Not affected 5.4.153 through 5.4.Not affected 5.10.73 through 5.10.Not affected 5.14.12 through 5.14.Not affected 5.15 and laterNot affected

Product

Versions

LinuxLinux

c17401a1dd210a5f22ab1ec7c7366037c158a14c to before 60ad4cde0ad28921f9ea25b0201c774b95ffa4b4Affected
c17401a1dd210a5f22ab1ec7c7366037c158a14c to before 17063cac4088b8e2fc0f633abddca5426ed58312Affected
c17401a1dd210a5f22ab1ec7c7366037c158a14c to before 97aeed72af4f83ae51534f0a2473ff52f8d66236Affected
c17401a1dd210a5f22ab1ec7c7366037c158a14c to before 75099439209d3cda439a1d9b00d19a50f0066fefAffected
c17401a1dd210a5f22ab1ec7c7366037c158a14c to before 2e5a20573a926302b233b0c2e1077f5debc7ab2eAffected

LinuxLinux

4.15Affected
before 4.15Not affected
4.19.211 through 4.19.*Not affected
5.4.153 through 5.4.*Not affected
5.10.73 through 5.10.*Not affected
5.14.12 through 5.14.*Not affected
5.15 and laterNot affected

References

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