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Thu, 11 Jun 2020 14:52:02 +0000 Received: by smtp431.mail.gq1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 6c780120874f2799e5b2cd41953912c9; Thu, 11 Jun 2020 14:51:59 +0000 (UTC) Date: Thu, 11 Jun 2020 10:51:55 -0400 From: "Alex Xu (Hello71)" Subject: Re: next-0519 on thinkpad x60: sound related? window manager crash To: Takashi Iwai References: <20200520111136.GA3802@amd> <1591545088.74ii116nf2.none@localhost> <20200608061950.GA17476@lst.de> <1591624340.z01ejtod28.none@localhost> <20200609114733.GA1621@lst.de> In-Reply-To: < MIME-Version: 1.0 Message-Id: <1591885264.uk6f214o4o.none@localhost> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Mailer: WebService/1.1.16072 hermes_yahoo Apache-HttpAsyncClient/4.1.4 (Java/11.0.6) Cc: alsa-devel@alsa-project.org, x86@kernel.org, rientjes@google.com, tiwai@suse.com, linux-kernel@vger.kernel.org, hch@infradead.org, mingo@redhat.com, bp@alien8.de, Pavel Machek , hpa@zytor.com, tglx@linutronix.de, Christoph Hellwig X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Excerpts from Takashi Iwai's message of June 9, 2020 11:12 am: > On Tue, 09 Jun 2020 13:47:33 +0200, > Christoph Hellwig wrote: >>=20 >> Alex, can you try this patch? >=20 > Also could you check whether just papering over the memset() call > alone avoids the crash like below? For PulseAudio and dmix/dsnoop, > it's the only code path that accesses the vmapped buffer, I believe. >=20 > If this works more or less, I'll cook a more comprehensive fix. >=20 >=20 > thanks, >=20 > Takashi >=20 > --- a/sound/core/pcm_native.c > +++ b/sound/core/pcm_native.c > @@ -754,9 +754,11 @@ static int snd_pcm_hw_params(struct snd_pcm_substrea= m *substream, > while (runtime->boundary * 2 <=3D LONG_MAX - runtime->buffer_size) > runtime->boundary *=3D 2; > =20 > +#if 0 > /* clear the buffer for avoiding possible kernel info leaks */ > if (runtime->dma_area && !substream->ops->copy_user) > memset(runtime->dma_area, 0, runtime->dma_bytes); > +#endif > =20 > snd_pcm_timer_resolution_change(substream); > snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); >=20 Sorry, this patch doesn't work for me with SME off using abfbb29297c2.=20 David's newest submitted patch works for me, which I already replied to=20 separately. Thanks, Alex.