netdev - Re: [PATCH] powerpc/bpf: fix write protecting JIT code

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Message-Id: <163584792256.1845480.13895202988410061927.b4-ty@ellerman.id.au>
Date:   Tue, 02 Nov 2021 21:12:02 +1100
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     jniethe5@...il.com, christophe.leroy@...roup.eu,
        Hari Bathini <hbathini@...ux.ibm.com>,
        naveen.n.rao@...ux.ibm.com, daniel@...earbox.net, ast@...nel.org,
        mpe@...erman.id.au
Cc:     john.fastabend@...il.com, kpsingh@...nel.org, yhs@...com,
        bpf@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        andrii@...nel.org, paulus@...ba.org, kafai@...com,
        stable@...r.kernel.org, netdev@...r.kernel.org,
        songliubraving@...com
Subject: Re: [PATCH] powerpc/bpf: fix write protecting JIT code

On Mon, 25 Oct 2021 11:26:49 +0530, Hari Bathini wrote:
> Running program with bpf-to-bpf function calls results in data access
> exception (0x300) with the below call trace:
> 
>     [c000000000113f28] bpf_int_jit_compile+0x238/0x750 (unreliable)
>     [c00000000037d2f8] bpf_check+0x2008/0x2710
>     [c000000000360050] bpf_prog_load+0xb00/0x13a0
>     [c000000000361d94] __sys_bpf+0x6f4/0x27c0
>     [c000000000363f0c] sys_bpf+0x2c/0x40
>     [c000000000032434] system_call_exception+0x164/0x330
>     [c00000000000c1e8] system_call_vectored_common+0xe8/0x278
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/bpf: fix write protecting JIT code
      https://git.kernel.org/powerpc/c/44a8214de96bafb5210e43bfa2c97c19bf75af3d

cheers