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

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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...

CVE-2025-37893

LoongArch LoongArch: BPF vulnerability fixed in arch/loongarch/net/bpf_jit.c: build_prologue() had an off-by-one error in JIT epilogue generation when mixing bpf2bpf and tailcalls. The first pass sets flags, the second emits N+1 instructions instead of N, causing epilogue_offset to be off and pot...