linux-kernel - Re: [BUG] NULL pointer dereference probably caused by kernel/trace/ring

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Message-ID: <CAM6WdxfsP13aS62=xWNTFEEzAekAuDwFTpnONP9qF3br-65KWQ@mail.gmail.com>
Date:   Tue, 1 Nov 2022 23:01:38 +0100
From:   Roland Ruckerbauer <roland.rucky@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Masami Hiramatsu <mhiramat@...nel.org>,
        linux-kernel@...r.kernel.org, Takashi Iwai <tiwai@...e.de>,
        regressions@...ts.linux.dev,
        Steven Noonan <steven.noonan@...il.com>
Subject: Re: [BUG] NULL pointer dereference probably caused by kernel/trace/ring_buffer.c

Just figured out something, the poll() errors starting at fd 29 (which
is CPU 24).
But I only have 24 cores. Looked at
/sys/kernel/debug/tracing/instances/rasdaemon/per_cpu/, and voila, it
lists 32 cpus not 24.