crypto: qat - fix IRQ cleanup on 6xxx probe failure

Overview

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

crypto: qat - fix IRQ cleanup on 6xxx probe failure

When adf_dev_up() partially completes and then fails, the IRQ handlers registered during adf_isr_resource_alloc() are not detached before the MSI-X vectors are released.

Since the device is enabled with pcim_enable_device(), calling pci_alloc_irq_vectors() internally registers pcim_msi_release() as a devres action. On probe failure, devres runs pcim_msi_release() which calls pci_free_irq_vectors(), tearing down the MSI-X vectors while IRQ handlers (for example 'qat0-bundle0') are still attached. This causes remove_proc_entry() warnings:

[   22.163964] remove_proc_entry: removing non-empty directory 'irq/143', leaking at least 'qat0-bundle0'

Moving the devm_add_action_or_reset() before adf_dev_up() does not solve the problem since devres runs in LIFO order and pcim_msi_release(), registered later inside adf_dev_up(), would still fire before adf_device_down().

Fix by calling adf_dev_down() explicitly when adf_dev_up() fails, to properly free IRQ handlers before devres releases the MSI-X vectors.

Affected

• Linux >= 17fd7514ae68c541bf952876ce2005cb4a53f283 < 27f561bf894e46bdc2d6209c50884adad79d8277
• Linux >= 17fd7514ae68c541bf952876ce2005cb4a53f283 < 7cd651f1357dcc477e6483c3a4706836b46bdc92
• Linux >= 17fd7514ae68c541bf952876ce2005cb4a53f283 < 95aed2af87ec43fa7624cc81dd13d37824ad4972
• Linux 6.16

Remediation

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