Linux Kernel RDMA Segment Overflow Vulnerability in SUNRPC

A vulnerability in the Linux kernel's SUNRPC component has been addressed, which involved a trap RDMA segment overflow. The issue was related to the function svc_rdma_build_writes(), which could improperly access the end of a Writechunk's segment array. This vulnerability was detected using KASAN (Kernel Address Sanitizer). The fix replaces a previous test that was invalid and may have originated from an earlier prototype of the PCL work.

Impact

Exploitation of this vulnerability could lead to a memory corruption issue, where the RDMA segment overflow could be manipulated, potentially causing a buffer overflow or other memory-related vulnerabilities.