Re: [edk2-devel] [PATCH v2] MdeModulePkg/SdDxe: Potential NULL pointer on Token

["Guomin Jiang" <guomin.jiang@intel.com>]

Hi Ray, Hao

Could you please help review this changes.

Thanks.
> -----Original Message-----
> From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of
> GuoMinJ
> Sent: Wednesday, March 4, 2020 5:41 PM
> To: devel@edk2.groups.io
> Cc: GuoMinJ <newexplorerj@gmail.com>; Wu, Hao A
> <hao.a.wu@intel.com>; Ni, Ray <ray.ni@intel.com>
> Subject: [edk2-devel] [PATCH v2] MdeModulePkg/SdDxe: Potential NULL
> pointer on Token
> 
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2286
> 
> Token pointer may be NULL, it is should be check before use it.
> 
> Cc: Hao A Wu <hao.a.wu@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Signed-off-by: GuoMinJ <newexplorerj@gmail.com>
> ---
>  MdeModulePkg/Bus/Sd/SdDxe/SdBlockIo.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/MdeModulePkg/Bus/Sd/SdDxe/SdBlockIo.c
> b/MdeModulePkg/Bus/Sd/SdDxe/SdBlockIo.c
> index 9f42abe7e2..0cc2e70b58 100644
> --- a/MdeModulePkg/Bus/Sd/SdDxe/SdBlockIo.c
> +++ b/MdeModulePkg/Bus/Sd/SdDxe/SdBlockIo.c
> @@ -1367,7 +1367,12 @@ SdEraseBlocks (
>      return Status;
>    }
> 
> -  DEBUG ((EFI_D_ERROR, "SdEraseBlocks(): Lba 0x%x BlkNo 0x%x Event %p
> with %r\n", Lba, BlockNum, Token->Event, Status));
> +  DEBUG ((DEBUG_ERROR, "SdEraseBlocks(): Lba 0x%x BlkNo 0x%x with %r,
> + ", Lba, BlockNum, Status));  if ((Token != NULL) && (Token->Event !=
> NULL)) {
> +    DEBUG ((DEBUG_ERROR, "Event pointer is %p\n", Token->Event));  }
> + else {
> +    DEBUG ((DEBUG_ERROR, "Event is meaningless\n"));  }
> 
>    return Status;
>  }
> --
> 2.17.1
> 
> 
>