From: Leon Hwang <leon.hwang@linux.dev>
To: Yonghong Song <yonghong.song@linux.dev>, bpf@vger.kernel.org
Cc: Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Eduard Zingerman <eddyz87@gmail.com>,
kernel-team@fb.com
Subject: Re: [PATCH bpf-next v3 0/3] bpf: Fix trampoline handling of 128-bit values
Date: Sat, 11 Jul 2026 20:18:07 +0800 [thread overview]
Message-ID: <e5a9125a-6966-4eef-af52-f8c5318d3496@linux.dev> (raw)
In-Reply-To: <20260710225206.4013062-1-yonghong.song@linux.dev>
On 2026/7/11 06:52, Yonghong Song wrote:
> The BPF trampoline preserves only 8 bytes of a target function's return
> value (R0), and its register save area under-allocates space for 128-bit
> arguments for x86_64. These two problems lead to memory corruption or
> incorrect values observed by BPF programs and the real caller.
>
> This series fixes both issues and adds two selftests, otherwise, each of
> them will fail if without the corresponding fix.
lgtm,
Acked-by: Leon Hwang <leon.hwang@linux.dev>
[...]
prev parent reply other threads:[~2026-07-11 12:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-10 22:52 [PATCH bpf-next v3 0/3] bpf: Fix trampoline handling of 128-bit values Yonghong Song
2026-07-10 22:52 ` [PATCH bpf-next v3 1/3] bpf: Reject >8 byte return values on return-reading trampoline paths Yonghong Song
2026-07-10 22:52 ` [PATCH bpf-next v3 2/3] bpf, x86: Fix trampoline stack size for 128-bit arguments Yonghong Song
2026-07-10 22:52 ` [PATCH bpf-next v3 3/3] selftests/bpf: Add tests for >8 byte return value and " Yonghong Song
2026-07-11 1:02 ` [PATCH bpf-next v3 0/3] bpf: Fix trampoline handling of 128-bit values Kumar Kartikeya Dwivedi
2026-07-11 3:58 ` Yonghong Song
2026-07-11 12:18 ` Leon Hwang [this message]
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