rom: Takashi Iwai
> Sent: Thursday, July 19, 2018 5:11 PM
> To: Zhang, Jun
> Cc: He, Bo ; alsa-de...@alsa-project.org; pe...@perex.cz;
> linux-kernel@vger.kernel.org; Zhang, Yanmin
> Subject: Re: [PATCH] ALSA: core: fix unsigned int pages overflow when comapred
>
> On Thu, 1
@vger.kernel.org; Zhang, Yanmin
Subject: Re: [PATCH] ALSA: core: fix unsigned int pages overflow when comapred
On Thu, 19 Jul 2018 08:42:14 +0200,
Takashi Iwai wrote:
>
> On Thu, 19 Jul 2018 08:08:06 +0200,
> Zhang, Jun wrote:
> >
> > Hello, Takashi
> >
> >
On Thu, 19 Jul 2018 08:42:14 +0200,
Takashi Iwai wrote:
>
> On Thu, 19 Jul 2018 08:08:06 +0200,
> Zhang, Jun wrote:
> >
> > Hello, Takashi
> >
> > I think use our patch, it's NOT possible that the returned size is over
> > sgbuf->tblsize.
> >
> > In function snd_malloc_sgbuf_pages,
> >
> > P
On Thu, 19 Jul 2018 08:08:06 +0200,
Zhang, Jun wrote:
>
> Hello, Takashi
>
> I think use our patch, it's NOT possible that the returned size is over
> sgbuf->tblsize.
>
> In function snd_malloc_sgbuf_pages,
>
> Pages is align page,
> sgbuf->tblsize is align 32*page,
> chunk is align 2^n*page,
:ti...@suse.de]
Sent: Wednesday, July 18, 2018 20:34
To: He, Bo
Cc: alsa-de...@alsa-project.org; pe...@perex.cz; linux-kernel@vger.kernel.org;
Zhang, Jun ; Zhang, Yanmin
Subject: Re: [PATCH] ALSA: core: fix unsigned int pages overflow when comapred
On Wed, 18 Jul 2018 13:52:45 +0200,
He, Bo wrot
Sent: Wednesday, July 18, 2018 8:34 PM
To: He, Bo
Cc: alsa-de...@alsa-project.org; pe...@perex.cz; linux-kernel@vger.kernel.org;
Zhang, Jun ; Zhang, Yanmin
Subject: Re: [PATCH] ALSA: core: fix unsigned int pages overflow when comapred
On Wed, 18 Jul 2018 13:52:45 +0200,
He, Bo wrote:
>
> we se
On Wed, 18 Jul 2018 13:52:45 +0200,
He, Bo wrote:
>
> we see the below kernel panic on stress suspend resume test in
> snd_malloc_sgbuf_pages(), snd_dma_alloc_pages_fallback() alloc
> chunk maybe larger than the left pages due to the pages alignment,
> which will cause the pages overflow.
>
> w
we see the below kernel panic on stress suspend resume test in
snd_malloc_sgbuf_pages(), snd_dma_alloc_pages_fallback() alloc
chunk maybe larger than the left pages due to the pages alignment,
which will cause the pages overflow.
while (pages > 0) {
...
pages -= chunk;
}
the patch
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