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Subject: Re: [PATCH bpf-next] bpf/selftests: use bpf_num_possible_cpus() in
 per-cpu map allocations
From:   patchwork-bot+netdevbpf@kernel.org
Message-Id: <164926561229.23950.7869141234456390467.git-patchwork-notify@kernel.org>
Date:   Wed, 06 Apr 2022 17:20:12 +0000
References: <20220406085408.339336-1-asavkov@redhat.com>
In-Reply-To: <20220406085408.339336-1-asavkov@redhat.com>
To:     Artem Savkov <asavkov@redhat.com>
Cc:     bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
        andrii@kernel.org, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
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List-ID: <bpf.vger.kernel.org>
X-Mailing-List: bpf@vger.kernel.org

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Andrii Nakryiko <andrii@kernel.org>:

On Wed,  6 Apr 2022 10:54:08 +0200 you wrote:
> bpf_map_value_size() uses num_possible_cpus() to determine map size, but
> some of the tests only allocate enough memory for online cpus. This
> results in out-of-bound writes in userspace during bpf(BPF_MAP_LOOKUP_ELEM)
> syscalls in cases when number of online cpus is lower than the number of
> possible cpus. Fix by switching from get_nprocs_conf() to
> bpf_num_possible_cpus() when determining the number of processors in
> these tests (test_progs/netcnt and test_cgroup_storage).
> 
> [...]

Here is the summary with links:
  - [bpf-next] bpf/selftests: use bpf_num_possible_cpus() in per-cpu map allocations
    https://git.kernel.org/bpf/bpf-next/c/ebaf24c589d7

You are awesome, thank you!
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