From: Alexei Starovoitov <alexei.starovoitov@gmail.com>
To: Hao Luo <haoluo@google.com>
Cc: Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>, KP Singh <kpsingh@kernel.org>,
bpf <bpf@vger.kernel.org>
Subject: Re: [PATCH bpf-next v2 4/9] bpf: Replace PTR_TO_XXX_OR_NULL with PTR_TO_XXX | PTR_MAYBE_NULL
Date: Sat, 18 Dec 2021 13:48:32 -0800 [thread overview]
Message-ID: <CAADnVQJi9izQFBxebcTLpneTsec3UG1d9zTpRh0msSJtTsDc2Q@mail.gmail.com> (raw)
In-Reply-To: <20211217003152.48334-5-haoluo@google.com>
On Thu, Dec 16, 2021 at 4:32 PM Hao Luo <haoluo@google.com> wrote:
> - switch (ptr_reg->type) {
> - case PTR_TO_MAP_VALUE_OR_NULL:
> - verbose(env, "R%d pointer arithmetic on %s prohibited, null-check it first\n",
> - dst, reg_type_str[ptr_reg->type]);
> + if (ptr_reg->type & PTR_MAYBE_NULL) {
> + verbose(env, "R%d (of type %s) may be null, null-check it first\n",
> + dst, reg_type_str(env, ptr_reg->type));
> return -EACCES;
I manually fixed the merge conflict in bpf_verifier.h, since
the verifier log improvement patchset went in first.
Also reverted to the original message in the above hunk while applying,
since it says 'may be null' twice and breaks test_verifier tests
which were not updated by this patch.
next prev parent reply other threads:[~2021-12-18 21:49 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-17 0:31 [PATCH bpf-next v2 0/9] Introduce composable bpf types Hao Luo
2021-12-17 0:31 ` [PATCH bpf-next v2 1/9] bpf: Introduce composable reg, ret and arg types Hao Luo
2021-12-17 0:31 ` [PATCH bpf-next v2 2/9] bpf: Replace ARG_XXX_OR_NULL with ARG_XXX | PTR_MAYBE_NULL Hao Luo
2021-12-17 0:31 ` [PATCH bpf-next v2 3/9] bpf: Replace RET_XXX_OR_NULL with RET_XXX " Hao Luo
2021-12-17 0:31 ` [PATCH bpf-next v2 4/9] bpf: Replace PTR_TO_XXX_OR_NULL with PTR_TO_XXX " Hao Luo
2021-12-18 21:48 ` Alexei Starovoitov [this message]
2021-12-17 0:31 ` [PATCH bpf-next v2 5/9] bpf: Introduce MEM_RDONLY flag Hao Luo
2021-12-17 0:31 ` [PATCH bpf-next v2 6/9] bpf: Convert PTR_TO_MEM_OR_NULL to composable types Hao Luo
2021-12-17 0:31 ` [PATCH bpf-next v2 7/9] bpf: Make per_cpu_ptr return rdonly PTR_TO_MEM Hao Luo
2021-12-18 21:48 ` Alexei Starovoitov
2021-12-17 0:31 ` [PATCH bpf-next v2 8/9] bpf: Add MEM_RDONLY for helper args that are pointers to rdonly mem Hao Luo
2021-12-18 21:48 ` Alexei Starovoitov
2021-12-20 20:14 ` Hao Luo
2021-12-17 0:31 ` [PATCH bpf-next v2 9/9] bpf/selftests: Test PTR_TO_RDONLY_MEM Hao Luo
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