From: patchwork-bot+netdevbpf@kernel.org
To: Pu Lehui <pulehui@huaweicloud.com>
Cc: bpf@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-kernel@vger.kernel.org, bjorn@kernel.org, ast@kernel.org,
daniel@iogearbox.net, andrii@kernel.org, eddyz87@gmail.com,
memxor@gmail.com, martin.lau@linux.dev, song@kernel.org,
yonghong.song@linux.dev, jolsa@kernel.org, emil@etsalapatis.com,
ihor.solodrai@linux.dev, puranjay@kernel.org, pjw@kernel.org,
palmer@dabbelt.com, alex@ghiti.fr, pulehui@huawei.com
Subject: Re: [PATCH bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args
Date: Fri, 14 Aug 2026 16:40:05 +0000 [thread overview]
Message-ID: <178672560540.3871347.8662836444766849077.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260814064726.3607615-1-pulehui@huaweicloud.com>
Hello:
This patch was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel@iogearbox.net>:
On Fri, 14 Aug 2026 06:47:26 +0000 you wrote:
> From: Pu Lehui <pulehui@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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prev parent reply other threads:[~2026-08-14 16:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-14 6:47 [PATCH bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args Pu Lehui
2026-08-14 16:40 ` patchwork-bot+netdevbpf [this message]
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