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(parent: c1ae3cf) | patch
iommu/io-pgtable-arm: Check for leaf entry before dereferencing it
authorOleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Mon, 27 Feb 2017 12:30:25 +0000 (14:30 +0200)
committerWill Deacon <will.deacon@arm.com>
Fri, 10 Mar 2017 18:23:34 +0000 (18:23 +0000)
commited46e66cc1b3d684042f92dfa2ab15ee917b4cac
treea0307607cdfb450cabc1494fd2bc9945d967bdb3tree | snapshot (tar.gz zip)
parentc1ae3cfa0e89fa1a7ecc4c99031f5e9ae99d9201commit | diff
iommu/io-pgtable-arm: Check for leaf entry before dereferencing it

Do a check for already installed leaf entry at the current level before
dereferencing it in order to avoid walking the page table down with
wrong pointer to the next level.

Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
drivers/iommu/io-pgtable-arm.c diff | blob | blame | history