* [PATCH] ArmPkg/ArmMmuLib ARM: disregard high memory when setting permissions
@ 2019-01-07 6:56 Ard Biesheuvel
2019-01-14 11:43 ` Leif Lindholm
0 siblings, 1 reply; 3+ messages in thread
From: Ard Biesheuvel @ 2019-01-07 6:56 UTC (permalink / raw)
To: edk2-devel
Ignore calls to ArmSetMemoryAttributes () when the region described
is outside of the 32-bit addressable range. This memory is not
mapped in the first place, and the current code does not deal with
the high bits correctly, resulting in hangs.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c b/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c
index 3b3b20aa9b78..bffab83d4fd0 100644
--- a/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c
+++ b/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c
@@ -744,6 +744,10 @@ ArmSetMemoryAttributes (
UINT64 ChunkLength;
BOOLEAN FlushTlbs;
+ if (BaseAddress > (UINT64)MAX_ADDRESS - Length + 1) {
+ return EFI_UNSUPPORTED;
+ }
+
if (Length == 0) {
return EFI_SUCCESS;
}
--
2.20.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] ArmPkg/ArmMmuLib ARM: disregard high memory when setting permissions
2019-01-07 6:56 [PATCH] ArmPkg/ArmMmuLib ARM: disregard high memory when setting permissions Ard Biesheuvel
@ 2019-01-14 11:43 ` Leif Lindholm
2019-01-14 18:46 ` Ard Biesheuvel
0 siblings, 1 reply; 3+ messages in thread
From: Leif Lindholm @ 2019-01-14 11:43 UTC (permalink / raw)
To: Ard Biesheuvel; +Cc: edk2-devel
On Mon, Jan 07, 2019 at 07:56:49AM +0100, Ard Biesheuvel wrote:
> Ignore calls to ArmSetMemoryAttributes () when the region described
> is outside of the 32-bit addressable range. This memory is not
> mapped in the first place, and the current code does not deal with
> the high bits correctly, resulting in hangs.
>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
> ---
> ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c b/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c
> index 3b3b20aa9b78..bffab83d4fd0 100644
> --- a/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c
> +++ b/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c
> @@ -744,6 +744,10 @@ ArmSetMemoryAttributes (
> UINT64 ChunkLength;
> BOOLEAN FlushTlbs;
>
> + if (BaseAddress > (UINT64)MAX_ADDRESS - Length + 1) {
> + return EFI_UNSUPPORTED;
> + }
> +
> if (Length == 0) {
> return EFI_SUCCESS;
> }
> --
> 2.20.1
>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] ArmPkg/ArmMmuLib ARM: disregard high memory when setting permissions
2019-01-14 11:43 ` Leif Lindholm
@ 2019-01-14 18:46 ` Ard Biesheuvel
0 siblings, 0 replies; 3+ messages in thread
From: Ard Biesheuvel @ 2019-01-14 18:46 UTC (permalink / raw)
To: Leif Lindholm; +Cc: edk2-devel@lists.01.org
On Mon, 14 Jan 2019 at 12:43, Leif Lindholm <leif.lindholm@linaro.org> wrote:
>
> On Mon, Jan 07, 2019 at 07:56:49AM +0100, Ard Biesheuvel wrote:
> > Ignore calls to ArmSetMemoryAttributes () when the region described
> > is outside of the 32-bit addressable range. This memory is not
> > mapped in the first place, and the current code does not deal with
> > the high bits correctly, resulting in hangs.
> >
> > Contributed-under: TianoCore Contribution Agreement 1.1
> > Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
>
> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
>
Thanks
Pushed as e695e44545b4..d08575759e5a
> > ---
> > ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c | 4 ++++
> > 1 file changed, 4 insertions(+)
> >
> > diff --git a/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c b/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c
> > index 3b3b20aa9b78..bffab83d4fd0 100644
> > --- a/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c
> > +++ b/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c
> > @@ -744,6 +744,10 @@ ArmSetMemoryAttributes (
> > UINT64 ChunkLength;
> > BOOLEAN FlushTlbs;
> >
> > + if (BaseAddress > (UINT64)MAX_ADDRESS - Length + 1) {
> > + return EFI_UNSUPPORTED;
> > + }
> > +
> > if (Length == 0) {
> > return EFI_SUCCESS;
> > }
> > --
> > 2.20.1
> >
^ permalink raw reply [flat|nested] 3+ messages in thread
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2019-01-07 6:56 [PATCH] ArmPkg/ArmMmuLib ARM: disregard high memory when setting permissions Ard Biesheuvel
2019-01-14 11:43 ` Leif Lindholm
2019-01-14 18:46 ` Ard Biesheuvel
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