netdev - Re: [PATCH bpf-next] bpf/selftests: use bpf_num_possible

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Message-Id: <164926561229.23950.7869141234456390467.git-patchwork-notify@kernel.org>
Date:   Wed, 06 Apr 2022 17:20:12 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Artem Savkov <asavkov@...hat.com>
Cc:     bpf@...r.kernel.org, ast@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next] bpf/selftests: use bpf_num_possible_cpus() in
 per-cpu map allocations

Hello:

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