回复: edk2-stable202111 Re: [edk2-devel] [PATCH] MdeModulePkg AtaAtapiPassThru: Skip the potential NULL pointer access

["gaoliming" <gaoliming@byosoft.com.cn>]

Leif:
  Thanks for your suggestion. I am OK to merge this patch into stable
tag20211.

Thanks
Liming
> -----邮件原件-----
> 发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Leif Lindholm
> 发送时间: 2021年11月23日 21:19
> 收件人: Rebecca Cran <rebecca@nuviainc.com>; gaoliming@byosoft.com.cn
> 抄送: devel@edk2.groups.io; Hao A Wu <hao.a.wu@intel.com>; Ray Ni
> <ray.ni@intel.com>; Andrew Fish <afish@apple.com>; Michael D Kinney
> <michael.d.kinney@intel.com>
> 主题: edk2-stable202111 Re: [edk2-devel] [PATCH] MdeModulePkg
> AtaAtapiPassThru: Skip the potential NULL pointer access
> 
> Since BZ3732 has been triggered by a standard build of a platform in
> edk2-platforms, I would request that this fix is brought into the
> upcoming stable tag.
> 
> SbsaQemu isn't a "real" platform, so I don't consider that in itself
> sufficient reason, but I feel the risk of it affecting other
> (including out-of-tree) platforms justifies it.
> 
> Best Regards,
> 
> Leif
> 
> On Tue, Nov 23, 2021 at 06:10:14 -0700, Rebecca Cran wrote:
> > Acked-by: Rebecca Cran <rebecca@nuviainc.com>
> >
> >
> > I've confirmed that this patch fixes the exception I was seeing when
running
> > the DEBUG build of SbsaQemu.
> >
> >
> > --
> >
> > Rebecca Cran
> >
> >
> > On 11/15/21 7:53 PM, gaoliming wrote:
> > > BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3732
> > > Recent change c974257821208fc6191779d1ddea918499f165b8 exposes
> this potential issue.
> > >
> > > Signed-off-by: Liming Gao <gaoliming@byosoft.com.cn>
> > > Cc: Hao A Wu <hao.a.wu@intel.com>
> > > Cc: Ray Ni <ray.ni@intel.com>
> > > ---
> > >   MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c | 7 +++++++
> > >   1 file changed, 7 insertions(+)
> > >
> > > diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
> b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
> > > index 7626bac38d..bda900a161 100644
> > > --- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
> > > +++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
> > > @@ -885,6 +885,13 @@ AhciPrintStatusBlock (
> > >     IN UINT32                DebugLevel
> > >     )
> > >   {
> > > +  //
> > > +  // Skip NULL pointer
> > > +  //
> > > +  if (AtaStatusBlock == NULL) {
> > > +    return;
> > > +  }
> > > +
> > >     //
> > >     // Only print status and error since we have all of the rest
printed as
> > >     // a part of command block print.
> 
> 
> 
>