The Linux kernel mana driver had a flaw where mana_remove() could be called twice if a power management resume failed but the driver was not unbound immediately. The first call to mana_remove() tears down the device and sets internal pointers to NULL. Without proper NULL checks, the second call dereferences a NULL pointer, causing a kernel panic. The fix adds early returns if gdma_context or driver_data are NULL and reorders pointer assignments to avoid dereferencing NULL.

This vulnerability leads to a denial of service via kernel panic when mana_remove() is invoked a second time on a device whose context pointers have been nulled. There is no impact on confidentiality or integrity, only availability is affected.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is applied, avoid conditions that cause failed PM resume callbacks or double invocation of mana_remove().