CVE-2024-26943 nouveau/dmem: handle kcalloc() allocation failure

In the Linux kernel, the following vulnerability has been resolved: nouveau/dmem: handle kcalloc allocation failure The kcalloc in nouveaudmemevictchunk will return null if the physical memory has run out. As a result, if we dereference srcpfns, dstpfns or dmaaddrs, the null pointer dereference...