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Subject: Re: [PATCH bpf-next] bpf: Check whether or not node is NULL before free
 it in free_bulk
From:   patchwork-bot+netdevbpf@kernel.org
Message-Id: <166368661551.24945.11632224303765790563.git-patchwork-notify@kernel.org>
Date:   Tue, 20 Sep 2022 15:10:15 +0000
References: <20220919144811.3570825-1-houtao@huaweicloud.com>
In-Reply-To: <20220919144811.3570825-1-houtao@huaweicloud.com>
To:     Hou Tao <houtao@huaweicloud.com>
Cc:     bpf@vger.kernel.org, ast@kernel.org, kafai@fb.com,
        andrii@kernel.org, songliubraving@fb.com, haoluo@google.com,
        yhs@fb.com, daniel@iogearbox.net, kpsingh@kernel.org,
        davem@davemloft.net, kuba@kernel.org, sdf@google.com,
        jolsa@kernel.org, john.fastabend@gmail.com, oss@lmb.io,
        houtao1@huawei.com
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List-ID: <bpf.vger.kernel.org>
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Hello:

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

On Mon, 19 Sep 2022 22:48:11 +0800 you wrote:
> From: Hou Tao <houtao1@huawei.com>
> 
> llnode could be NULL if there are new allocations after the checking of
> c-free_cnt > c->high_watermark in bpf_mem_refill() and before the
> calling of __llist_del_first() in free_bulk (e.g. a PREEMPT_RT kernel
> or allocation in NMI context). And it will incur oops as shown below:
> 
> [...]

Here is the summary with links:
  - [bpf-next] bpf: Check whether or not node is NULL before free it in free_bulk
    https://git.kernel.org/bpf/bpf-next/c/c31b38cb948e

You are awesome, thank you!
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