From: Eduard Zingerman <eddyz87@gmail.com>
To: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Andrii Nakryiko <andrii@kernel.org>,
bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
martin.lau@kernel.org, kernel-team@meta.com,
Tao Lyu <tao.lyu@epfl.ch>
Subject: Re: [PATCH bpf-next 2/7] bpf: support non-r10 register spill/fill to/from stack in precision tracking
Date: Sun, 12 Nov 2023 16:05:29 +0200 [thread overview]
Message-ID: <f642a19de4ee36b9ee1c08511c05fe196346d184.camel@gmail.com> (raw)
In-Reply-To: <CAEf4BzZOtAdzfBqP4H0sqhev00mCuRhbMkTX=DkPyh34s7ypeQ@mail.gmail.com>
On Sat, 2023-11-11 at 17:57 -0800, Andrii Nakryiko wrote:
[...]
> I ended up with these changes on top of this patch:
>
> diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
> index 23dbfb5022ba..d234c6f53741 100644
> --- a/kernel/bpf/verifier.c
> +++ b/kernel/bpf/verifier.c
> @@ -3167,6 +3167,21 @@ static int check_reg_arg(struct
> bpf_verifier_env *env, u32 regno,
> return 0;
> }
>
> +static int insn_stack_access_flags(int frameno, int spi)
> +{
> + return INSN_F_STACK_ACCESS | (spi << INSN_F_SPI_SHIFT) | frameno;
> +}
> +
> +static int insn_stack_access_spi(int insn_flags)
> +{
> + return (insn_flags >> INSN_F_SPI_SHIFT) & INSN_F_SPI_MASK;
> +}
> +
> +static int insn_stack_access_frameno(int insn_flags)
> +{
> + return insn_flags & INSN_F_FRAMENO_MASK;
> +}
Looks good, thank you.
next prev parent reply other threads:[~2023-11-12 14:05 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-31 5:03 [PATCH bpf-next 0/7] Complete BPF verifier precision tracking support for register spills Andrii Nakryiko
2023-10-31 5:03 ` [PATCH bpf-next 1/7] bpf: use common jump (instruction) history across all states Andrii Nakryiko
2023-11-09 15:20 ` Eduard Zingerman
2023-11-09 16:13 ` Alexei Starovoitov
2023-11-09 17:28 ` Andrii Nakryiko
2023-11-09 19:29 ` Alexei Starovoitov
2023-11-09 19:49 ` Andrii Nakryiko
2023-11-09 20:39 ` Andrii Nakryiko
2023-11-09 22:05 ` Alexei Starovoitov
2023-11-09 22:57 ` Andrii Nakryiko
2023-11-11 4:29 ` Andrii Nakryiko
2023-10-31 5:03 ` [PATCH bpf-next 2/7] bpf: support non-r10 register spill/fill to/from stack in precision tracking Andrii Nakryiko
2023-11-09 15:20 ` Eduard Zingerman
2023-11-09 17:20 ` Andrii Nakryiko
2023-11-09 18:20 ` Eduard Zingerman
2023-11-10 5:48 ` Andrii Nakryiko
2023-11-12 1:57 ` Andrii Nakryiko
2023-11-12 14:05 ` Eduard Zingerman [this message]
2023-10-31 5:03 ` [PATCH bpf-next 3/7] bpf: enforce precision for r0 on callback return Andrii Nakryiko
2023-11-09 15:20 ` Eduard Zingerman
2023-11-09 17:32 ` Andrii Nakryiko
2023-11-09 17:38 ` Eduard Zingerman
2023-11-09 17:50 ` Andrii Nakryiko
2023-11-09 17:58 ` Alexei Starovoitov
2023-11-09 18:01 ` Andrii Nakryiko
2023-11-09 18:03 ` Eduard Zingerman
2023-11-09 18:00 ` Eduard Zingerman
2023-10-31 5:03 ` [PATCH bpf-next 4/7] bpf: fix check for attempt to corrupt spilled pointer Andrii Nakryiko
2023-11-09 15:20 ` Eduard Zingerman
2023-10-31 5:03 ` [PATCH bpf-next 5/7] bpf: preserve STACK_ZERO slots on partial reg spills Andrii Nakryiko
2023-11-09 15:20 ` Eduard Zingerman
2023-11-09 17:37 ` Andrii Nakryiko
2023-11-09 17:54 ` Eduard Zingerman
2023-10-31 5:03 ` [PATCH bpf-next 6/7] bpf: preserve constant zero when doing partial register restore Andrii Nakryiko
2023-11-09 15:20 ` Eduard Zingerman
2023-11-09 17:41 ` Andrii Nakryiko
2023-11-09 19:34 ` Eduard Zingerman
2023-10-31 5:03 ` [PATCH bpf-next 7/7] bpf: track aligned STACK_ZERO cases as imprecise spilled registers Andrii Nakryiko
2023-10-31 5:22 ` Andrii Nakryiko
2023-11-01 7:56 ` Jiri Olsa
2023-11-01 16:27 ` Andrii Nakryiko
2023-11-02 9:54 ` Jiri Olsa
2023-11-09 15:21 ` Eduard Zingerman
2023-11-09 17:43 ` Andrii Nakryiko
2023-11-09 17:44 ` Eduard Zingerman
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