[edk2-devel] [PATCH 1/1] UefiCpuPkg/PiSmmCpuDxeSmm: fix format string

[Michael D Kinney]

1) Keep %d and change BufferPages to type UINT32.
2) Change to %Ld and change BufferPages to type UINT64.

Mike

> -----Original Message-----
> From: Ni, Ray <ray.ni at intel.com>
> Sent: Friday, March 24, 2023 7:00 AM
> To: Gerd Hoffmann <kraxel at redhat.com>; devel at edk2.groups.io; Kinney, Michael D <michael.d.kinney at intel.com>
> Cc: Dong, Eric <eric.dong at intel.com>; Oliver Steffen <osteffen at redhat.com>; Kumar, Rahul R <rahul.r.kumar at intel.com>;
> Pawel Polawski <ppolawsk at redhat.com>; Laszlo Ersek <lersek at redhat.com>
> Subject: RE: [PATCH 1/1] UefiCpuPkg/PiSmmCpuDxeSmm: fix format string
> 
> Gerd,
> "%d" tells "int" type value is in the stack.
> This actually works in both 32bit and 64bit case assuming the BufferPages is less than MAX_UINT32.
> 
> But if using "%Lu", it tells that "uint_64" type value is in the stack.
> This precisely describes the stack content in 64bit mode.
> But it may print random value in the stack as high-32 bit in 32bit mode.
> 
> @Kinney, Michael D, any comments?
> 
> Thanks,
> Ray
> 
> 
> > -----Original Message-----
> > From: Gerd Hoffmann <kraxel at redhat.com>
> > Sent: Friday, March 24, 2023 9:42 PM
> > To: devel at edk2.groups.io
> > Cc: Dong, Eric <eric.dong at intel.com>; Gerd Hoffmann <kraxel at redhat.com>;
> > Oliver Steffen <osteffen at redhat.com>; Kumar, Rahul R
> > <rahul.r.kumar at intel.com>; Ni, Ray <ray.ni at intel.com>; Pawel Polawski
> > <ppolawsk at redhat.com>; Laszlo Ersek <lersek at redhat.com>
> > Subject: [PATCH 1/1] UefiCpuPkg/PiSmmCpuDxeSmm: fix format string
> >
> > BufferPages is UINTN, so we need "%Lu" when printing it.
> >
> > Fixes: 4f441d024bee ("UefiCpuPkg/PiSmmCpuDxeSmm: fix error handling")
> > Reported-by: Laszlo Ersek <lersek at redhat.com>
> > Signed-off-by: Gerd Hoffmann <kraxel at redhat.com>
> > ---
> >  UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
> > b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
> > index cf69161caa4b..08663b1b1ab4 100644
> > --- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
> > +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
> > @@ -880,7 +880,7 @@ PiCpuSmmEntry (
> >      BufferPages = EFI_SIZE_TO_PAGES (SIZE_32KB + TileSize *
> > (mMaxNumberOfCpus - 1));
> >      Buffer      = AllocateAlignedCodePages (BufferPages, SIZE_4KB);
> >      if (Buffer == NULL) {
> > -      DEBUG ((DEBUG_ERROR, "Failed to allocate %d pages.\n", BufferPages));
> > +      DEBUG ((DEBUG_ERROR, "Failed to allocate %Lu pages.\n",
> > BufferPages));
> >        CpuDeadLoop ();
> >        return EFI_OUT_OF_RESOURCES;
> >      }
> > --
> > 2.39.2



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