Description
In the Linux kernel, the following vulnerability has been resolved: riscv: Prevent a bad reference count on CPU nodes When populating cache leaves we previously fetched the CPU device node at the very beginning. But when ACPI is enabled we go through a specific branch which returns early and does not call 'of_node_put' for the node that was acquired. Since we are not using a CPU device node for the ACPI code anyways, we can simply move the initialization of it just passed the ACPI block, and we are guaranteed to have an 'of_node_put' call for the acquired node. This prevents a bad reference count of the CPU device node. Moreover, the previous function did not check for errors when acquiring the device node, so a return -ENOENT has been added for that case.
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
ebccacb0b599fa788a16eff35a7de14621f56804 to < 80aec5a855106c668b5978c48e789f010198b832affected604f32ea6909b0ebb8ab0bf1ab7dc66ee3dc8955 to < 303846a3dc275e35fbb556d72f1e356ba669e4f8affected604f32ea6909b0ebb8ab0bf1ab7dc66ee3dc8955 to < 37233169a6ea912020c572f870075a63293b786aaffected
Linux Linux
Default version status: affected
6.11affected0 to < 6.11unaffected6.11.7 to ≤ 6.11.*unaffected6.12 to ≤ *unaffected