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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2019-01-07 07:56:49 +0100 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2019-01-14 19:42:23 +0100 |
| commit | d08575759e5a853e157e6e418e9fea5d5864f725 (patch) | |
| tree | 4f8789549e4aea0c2e21a665daeb53f8fe8903ce /ArmPkg/Library | |
| parent | e695e44545b41dc6321af73277a9056f5f4808d7 (diff) | |
| download | edk2-d08575759e5a853e157e6e418e9fea5d5864f725.tar.gz edk2-d08575759e5a853e157e6e418e9fea5d5864f725.tar.bz2 edk2-d08575759e5a853e157e6e418e9fea5d5864f725.zip | |
ArmPkg/ArmMmuLib ARM: disregard high memory when setting permissions
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>
Diffstat (limited to 'ArmPkg/Library')
| -rw-r--r-- | ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c b/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c index 3b3b20aa9b..bffab83d4f 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;
}
|