CVE-2024-35882

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> SUNRPC: Fix a slow server-side memory leak with RPC-over-TCP<br /> <br /> Jan Schunk reports that his small NFS servers suffer from memory<br /> exhaustion after just a few days. A bisect shows that commit<br /> e18e157bb5c8 ("SUNRPC: Send RPC message on TCP with a single<br /> sock_sendmsg() call") is the first bad commit.<br /> <br /> That commit assumed that sock_sendmsg() releases all the pages in<br /> the underlying bio_vec array, but the reality is that it doesn&amp;#39;t.<br /> svc_xprt_release() releases the rqst&amp;#39;s response pages, but the<br /> record marker page fragment isn&amp;#39;t one of those, so it is never<br /> released.<br /> <br /> This is a narrow fix that can be applied to stable kernels. A<br /> more extensive fix is in the works.