linux-kernel - Re: [PATCH] bpf: don't fail kmalloc while releasing raw

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Message-ID: <20201116160651.0e2d9b63@gandalf.local.home>
Date:   Mon, 16 Nov 2020 16:06:51 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc:     paulmck <paulmck@...nel.org>, Matt Mullins <mmullins@...x.us>,
        Ingo Molnar <mingo@...hat.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>
Subject: Re: [PATCH] bpf: don't fail kmalloc while releasing raw_tp

On Mon, 16 Nov 2020 16:02:18 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> +		if (new) {
> +			for (i = 0; old[i].func; i++)
> +				if (old[i].func != tp_func->func
> +				    || old[i].data != tp_func->data)
> +					new[j++] = old[i];

Oops, need to check for old[i].func != tp_stub_func here too.

-- Steve

> +			new[nr_probes - nr_del].func = NULL;
> +		} else {