[PATCH bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args

[patchwork-bot+netdevbpf at kernel.org]

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel at iogearbox.net>:

On Fri, 14 Aug 2026 06:47:26 +0000 you wrote:
> From: Pu Lehui <pulehui at huawei.com>
> 
> On RV64, the ABI requires sign-extension for signed 1-byte and 2-byte
> kfunc args. However, the RV64 JIT currently does not perform
> sign-extension for such kfunc args.
> 
> Before commit 7ce090afbf72 ("bpf: Infer zext_dst based on static
> register liveness analysis"), state pruning could potentially omit
> zero-extension of 32-bit subregisters, which inadvertently masked the
> above issue by making the args appear as if they had been properly
> sign-extended. After that commit, the problem is exposed, causing the
> kfunc_call/kfunc_call_test4 selftest to fail.
> 
> [...]

Here is the summary with links:
  - [bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args
    https://git.kernel.org/bpf/bpf-next/c/f2aaa6215910

You are awesome, thank you!
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