linux-kernel - Re: [PATCH bpf] Revert "bpf: program: Refuse non-O_RDWR flags in BPF_OBJ

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Date:   Tue, 22 Jun 2021 11:48:31 +0200
From:   Greg Kroah-Hartman <gregkh@...gle.com>
To:     Maciej Żenczykowski <zenczykowski@...il.com>,
        Maciej Żenczykowski <maze@...gle.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Cc:     Linux Network Development Mailing List <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        BPF Mailing List <bpf@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Lorenz Bauer <lmb@...udflare.com>
Subject: Re: [PATCH bpf] Revert "bpf: program: Refuse non-O_RDWR flags in
 BPF_OBJ_GET"

On 6/18/21 12:55 PM, Maciej Żenczykowski wrote:
> From: Maciej Żenczykowski <maze@...gle.com>
> 
> This reverts commit d37300ed182131f1757895a62e556332857417e5.
> 
> This breaks Android userspace which expects to be able to
> fetch programs with just read permissions.
> 
> See: https://cs.android.com/android/platform/superproject/+/master:frameworks/libs/net/common/native/bpf_syscall_wrappers/include/BpfSyscallWrappers.h;drc=7005c764be23d31fa1d69e826b4a2f6689a8c81e;l=124
> 
> Cc: Alexei Starovoitov <ast@...nel.org>
> Cc: Andrii Nakryiko <andrii@...nel.org>
> Cc: Daniel Borkmann <daniel@...earbox.net>
> Cc: Greg Kroah-Hartman <gregkh@...gle.com>
> Cc: Lorenz Bauer <lmb@...udflare.com>
> Fixes: d37300ed1821 ("bpf: program: Refuse non-O_RDWR flags in BPF_OBJ_GET")
> Signed-off-by: Maciej Żenczykowski <maze@...gle.com>
> ---

Acked-by: Greg Kroah-Hartman <gregkh@...gle.com>