From: Eduard Zingerman <eddyz87@gmail.com>
To: Ning Ding <dingning04@gmail.com>, bpf@vger.kernel.org
Cc: memxor@gmail.com, ast@kernel.org, daniel@iogearbox.net,
andrii@kernel.org, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org, shuah@kernel.org
Subject: Re: [PATCH bpf-next 1/2] bpf: Compare iterator types during state pruning
Date: Mon, 10 Aug 2026 12:35:02 -0700 [thread overview]
Message-ID: <d7f9046b1212e0b368bfde10b88549ac9ac8f63c.camel@gmail.com> (raw)
In-Reply-To: <20260807004320.134069-2-dingning04@gmail.com>
On Thu, 2026-08-06 at 17:43 -0700, Ning Ding wrote:
> An iterator stack slot can be MEM_RCU or PTR_UNTRUSTED. These states
> must not be equal, or the verifier can prune an unsafe path.
>
> Compare the pointer type for STACK_ITER slots.
>
> Fixes: dfab99df147b ("bpf: teach the verifier to enforce css_iter and task_iter in RCU CS")
> Signed-off-by: Ning Ding <dingning04@gmail.com>
> ---
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
...
next prev parent reply other threads:[~2026-08-10 19:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-07 0:43 [PATCH bpf-next 0/2] bpf: Compare iterator types during state pruning Ning Ding
2026-08-07 0:43 ` [PATCH bpf-next 1/2] " Ning Ding
2026-08-10 19:35 ` Eduard Zingerman [this message]
2026-08-07 0:43 ` [PATCH bpf-next 2/2] selftests/bpf: Test RCU iterator " Ning Ding
2026-08-10 19:36 ` Eduard Zingerman
2026-08-11 0:32 ` Ning Ding
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