Linux Kernel Null Pointer Dereference Vulnerability in RPM Power Domain Management

A vulnerability in the Linux kernel's RPM power domain management can lead to a null pointer dereference. This issue arises because the allocation function 'devm_kcalloc' may fail, leaving 'data->domains' as a null pointer. If this null pointer is later dereferenced, it can cause a crash. The vulnerability has been addressed by adding a check for null allocations, ensuring that -ENOMEM is returned without manually releasing data if the allocation fails.

Impact

Exploitation of this vulnerability can lead to a null pointer dereference, causing a kernel crash.