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Date:   Thu, 12 May 2022 04:30:12 +0000
To:     Yuntao Wang <>
Subject: Re: [PATCH bpf-next] bpf: Fix potential array overflow in


This patch was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <>:

On Sat, 30 Apr 2022 21:08:03 +0800 you wrote:
> The cnt value in the 'cnt >= BPF_MAX_TRAMP_PROGS' check does not
> include BPF_TRAMP_MODIFY_RETURN bpf programs, so the number of
> the attached BPF_TRAMP_MODIFY_RETURN bpf programs in a trampoline
> can exceed BPF_MAX_TRAMP_PROGS.
> When this happens, the assignment '*progs++ = aux->prog' in
> bpf_trampoline_get_progs() will cause progs array overflow as the
> progs field in the bpf_tramp_progs struct can only hold at most
> BPF_MAX_TRAMP_PROGS bpf programs.
> [...]

Here is the summary with links:
  - [bpf-next] bpf: Fix potential array overflow in bpf_trampoline_get_progs()

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