From: "Alexei Starovoitov" <alexei.starovoitov@gmail.com>
To: "Henry Martin" <bsdhenrymartin@gmail.com>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"John Fastabend" <john.fastabend@gmail.com>,
"Andrii Nakryiko" <andrii@kernel.org>,
"Eduard Zingerman" <eddyz87@gmail.com>,
"Kumar Kartikeya Dwivedi" <memxor@gmail.com>,
"Martin KaFai Lau" <martin.lau@linux.dev>,
"Song Liu" <song@kernel.org>,
"Yonghong Song" <yonghong.song@linux.dev>,
"Jiri Olsa" <jolsa@kernel.org>,
"Emil Tsalapatis" <emil@etsalapatis.com>,
"Ihor Solodrai" <ihor.solodrai@linux.dev>
Cc: <bpf@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] bpf: fix out-of-bounds frame access for async callback stack args
Date: Sun, 01 Nov 2026 01:08:50 +0000 [thread overview]
Message-ID: <DMJH18O0LW66.2X5ZLK1R332QH@gmail.com> (raw)
In-Reply-To: <20261027154553.1043567-1-bsdhenrymartin@gmail.com>
On Tue, Oct 27, 2026 at 08:45 AM Henry Martin <bsdhenrymartin@gmail.com> wrote:
> Kernel helpers pass at most five callback arguments, all in
> registers, so an incoming stack argument load can never be valid in
> a callback frame. Reject such loads when the current frame has no
> caller (curframe == 0) or is a callback frame (state->in_callback_fn).
It's fixed already.
commit 90aedf8854c0 ("bpf: Validate stack arg reads against caller state")
pw-bot: cr
prev parent reply other threads:[~2026-11-01 1:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-27 15:45 Henry Martin
2026-11-01 1:08 ` Alexei Starovoitov [this message]
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