CVE-2025-37893 LoongArch: BPF: Fix off-by-one error in build_prologue()

In the Linux kernel, the following vulnerability has been resolved: LoongArch: BPF: Fix off-by-one error in buildprologue Vincent reported that running BPF progs with tailcalls on LoongArch causes kernel hard lockup. Debugging the issues shows that the JITed image missing a jirl instruction at th...