Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Mon, 08 Jun 2020 09:53:30 -0400
From:   "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
Subject: Re: next-0519 on thinkpad x60: sound related? window manager crash
To:     Christoph Hellwig <hch@lst.de>
Cc:     alsa-devel@alsa-project.org, bp@alien8.de, hch@infradead.org,
        hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com,
        Pavel Machek <pavel@ucw.cz>, perex@perex.cz,
        rientjes@google.com, tglx@linutronix.de, tiwai@suse.com,
        x86@kernel.org
References: <20200520111136.GA3802@amd>
        <1591545088.74ii116nf2.none@localhost> <20200608061950.GA17476@lst.de>
In-Reply-To: <20200608061950.GA17476@lst.de>
MIME-Version: 1.0
Message-Id: <1591624340.z01ejtod28.none@localhost>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Content-Length: 811
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Excerpts from Christoph Hellwig's message of June 8, 2020 2:19 am:
> Can you do a listing using gdb where this happens?
>=20
> gdb vmlinux
>=20
> l *(snd_pcm_hw_params+0x3f3)
>=20
> ?
>=20

(gdb) l *(snd_pcm_hw_params+0x3f3)
0xffffffff817efc85 is in snd_pcm_hw_params (.../linux/sound/core/pcm_native=
.c:749).
744             while (runtime->boundary * 2 <=3D LONG_MAX - runtime->buffe=
r_size)
745                     runtime->boundary *=3D 2;
746
747             /* clear the buffer for avoiding possible kernel info leaks=
 */
748             if (runtime->dma_area && !substream->ops->copy_user)
749                     memset(runtime->dma_area, 0, runtime->dma_bytes);
750
751             snd_pcm_timer_resolution_change(substream);
752             snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
753