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Change History

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

ice: ice_adapter: release xa entry on adapter allocation failure

When ice_adapter_new() fails, the reserved XArray entry created by
xa_insert() is not released. This causes subsequent insertions at
the same index to return -EBUSY, potentially leading to
NULL pointer dereferences.

Reorder the operations as suggested by Przemek Kitszel:
1. Check if adapter already exists (xa_load)
2. Reserve the XArray slot (xa_reserve)
3. Allocate the adapter (ice_adapter_new)
4. Store the adapter (xa_store)

https://git.kernel.org/stable/c/2db687f3469dbc5c59bc53d55acafd75d530b497

https://git.kernel.org/stable/c/794abb265de3e792167fe3ea0440c064c722bb84

https://git.kernel.org/stable/c/7b9269de9815fc34d93dab90bd5169bacbe78e70