linux-kernel - Re: [PATCH] mmc: sdio: fix kernel panic when remove non-standard SDIO card

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Date:   Fri, 14 Oct 2022 02:22:01 +0000
From:   欧阳炜钊(Weizhao Ouyang) 
        <ouyangweizhao@...u.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        王大宇(John Wang) <wangdayu@...u.com>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        马宏伟(Matthew Ma) <mahongwei@...u.com>,
        Pierre Ossman <drzeus@...eus.cx>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: sdio: fix kernel panic when remove non-standard SDIO
 card

2022年10月12日 18:09, Ulf Hansson <ulf.hansson@...aro.org> wrote:
> 
> On Wed, 12 Oct 2022 at 03:50, 欧阳炜钊(Weizhao Ouyang)
> <ouyangweizhao@...u.com> wrote:
> >
> > 2022年10月11日 22:41, Ulf Hansson <ulf.hansson@...aro.org> wrote:
> > >
> > > On Tue, 27 Sept 2022 at 04:04, Weizhao Ouyang
> <ouyangweizhao@...u.com>
> > > wrote:
> > > >
> > > > From: Matthew Ma <mahongwei@...u.com>
> > > >
> > > > SDIO tuple is only allocated for standard SDIO card, especially it
> > > > causes memory corruption issues when the non-standard SDIO card has
> > > > removed since the card device's reference counter does not increase for
> > > > it at sdio_init_func(), but all SDIO card device reference counter has
> > > > decreased at sdio_release_func().
> > > >
> > > > Fixes: 1a632f8cdc33 ("sdio: split up common and function CIS parsing")
> > > > Signed-off-by: Matthew Ma <mahongwei@...u.com>
> > > > Reviewed-by: Weizhao Ouyang <ouyangweizhao@...u.com>
> > > > Reviewed-by: John Wang <wangdayu@...u.com>
> > >
> > > Apologize for the delay!
> > >
> > > Wow, that's a very old bug you fixed! However, it looks like the fixed
> > > commit should be changed to 6f51be3d37df ("sdio: allow non-standard
> > > SDIO cards").
> >
> > Thanks, I messed the tag.
> >
> > >
> > > I tried to apply the patch, but the patch format seems to be corrupt.
> > > Did you use git format-patch and did run ./scripts/checkpatch.pl on
> > > it?
> > >
> >
> > Yeah I used checkpatch.pl with strict mode to check this patch, and it
> > has no obvious style problems. What's the format error you got?
> 
> ERROR: patch seems to be corrupt (line wrapped?)
> #130: FILE: drivers/mmc/core/sdio_bus.c:291:
> struct sdio_func *func = dev_to_sdio_func(dev);
> 
> total: 1 errors, 0 warnings, 9 lines checked
> 

Sorry our email hosting service made some issue on formatting, I will
send an updated patch ASAP.

Thanks,
Weizhao