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(parent: 9ff0119) | patch
arm64: mm: purge lazily unmapped vm regions before changing permissions
authorArd Biesheuvel <ard.biesheuvel@linaro.org>
Wed, 7 Nov 2018 10:36:19 +0000 (11:36 +0100)
committerWill Deacon <will.deacon@arm.com>
Tue, 20 Nov 2018 11:38:26 +0000 (11:38 +0000)
commitb34d2ef0c60e4d9c2bb8a4d72d4519c67363d390
treedbeb02f908943cc0c5fdcbecc87b187389b7d449tree | snapshot
parent9ff01193a20d391e8dbce4403dd5ef87c7eaaca6commit | diff
arm64: mm: purge lazily unmapped vm regions before changing permissions

Call vm_unmap_aliases() every time we apply any changes to permission
attributes of mappings in the vmalloc region. This avoids any potential
issues resulting from lingering writable or executable aliases of
mappings that should be read-only or non-executable, respectively.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/mm/pageattr.c diff | blob | history
John Crispins staging tree