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| author |   Catalin Marinas <catalin.marinas@arm.com> | 2013-05-07 16:57:06 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-05-08 10:33:16 +0100 |
| commit | 0e7f7bcc3fc87489cda5aa6aff8ce40eed912279 (patch) | |
| tree | 42256e2678fc1c4a53686cb6f701560c3d86781b /arch/arm64/lib | |
| parent | arm64: dts: fix #address-cells for foundation-v8 (diff) | |
| download | linux-dev-0e7f7bcc3fc87489cda5aa6aff8ce40eed912279.tar.xz linux-dev-0e7f7bcc3fc87489cda5aa6aff8ce40eed912279.zip | |
arm64: Ignore the 'write' ESR flag on cache maintenance faults
ESR.WnR bit is always set on data cache maintenance faults even though
the page is not required to have write permission. If a translation
fault (page not yet mapped) happens for read-only user address range,
Linux incorrectly assumes a permission fault. This patch adds the check
of the ESR.CM bit during the page fault handling to ignore the 'write'
flag.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Tim Northover <Tim.Northover@arm.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'arch/arm64/lib')
0 files changed, 0 insertions, 0 deletions