CVE-2026-23285 drbd: fix null-pointer dereference on local read error

In the Linux kernel, the following vulnerability has been resolved: drbd: fix null-pointer dereference on local read error In drbdrequestendio, READCOMPLETEDWITHERROR is passed to reqmod with a NULL peerdevice: reqmodreq, what, NULL, &m; The READCOMPLETEDWITHERROR handler then unconditionally...