linux-kernel - Re: 2.6.24-rc8-mm1: old sparc64 bug

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Date:	Mon, 28 Jan 2008 12:55:09 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Mariusz Kozlowski <m.kozlowski@...land.pl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org,
	David Miller <davem@...emloft.net>, perex@...ex.cz
Subject: Re: 2.6.24-rc8-mm1: old sparc64 bug

At Fri, 25 Jan 2008 19:34:35 +0100,
Mariusz Kozlowski wrote:
> 
> Hello,
> 
> > > 	I was digging through the gentoo bugzilla and found this:
> > > 
> > > http://bugs.gentoo.org/show_bug.cgi?id=141823
> > > 
> > > As you see this bug is present since at least 2.6.17. I can reproduce
> > > that here on my hardware with 2.6.24-rc8-mm1. All you need to do is install
> > > mp3blaster on sparc64, run:
> > > 
> > > $ mp3blaster some_mp3_file.mp3 
> > > 
> > > and stop it by pressing ctrl-c. It oopses when you stop it. It doesn't happen
> > > every time but it'll oops in a few tries.
> > 
> > This looks similar like a bug I fixed ago.  Damn, it's still there.
> > 
> > Could you build with CONFIG_SND_DEBUG=y ?  It addas some sanity checks
> > and might catch the fatal condition.
> 
> Done. I don't think it changed much though :-/

OK, could you try the patch below?


thanks,

Takashi

---

diff -r edbe1b84179b sound/core/oss/pcm_oss.c
--- a/sound/core/oss/pcm_oss.c	Mon Jan 28 12:30:17 2008 +0100
+++ b/sound/core/oss/pcm_oss.c	Mon Jan 28 12:56:13 2008 +0100
@@ -1621,6 +1621,7 @@ static int snd_pcm_oss_sync(struct snd_p
 					snd_pcm_format_set_silence(runtime->format,
 								   runtime->oss.buffer,
 								   size1);
+					size1 /= runtime->channels; /* frames */
 					fs = snd_enter_user();
 					snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
 					snd_leave_user(fs);
--
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