CVE-2023-53539

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> RDMA/rxe: Fix incomplete state save in rxe_requester<br /> <br /> If a send packet is dropped by the IP layer in rxe_requester()<br /> the call to rxe_xmit_packet() can fail with err == -EAGAIN.<br /> To recover, the state of the wqe is restored to the state before<br /> the packet was sent so it can be resent. However, the routines<br /> that save and restore the state miss a significnt part of the<br /> variable state in the wqe, the dma struct which is used to process<br /> through the sge table. And, the state is not saved before the packet<br /> is built which modifies the dma struct.<br /> <br /> Under heavy stress testing with many QPs on a fast node sending<br /> large messages to a slow node dropped packets are observed and<br /> the resent packets are corrupted because the dma struct was not<br /> restored. This patch fixes this behavior and allows the test cases<br /> to succeed.