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| author | Catalin Marinas <catalin.marinas@arm.com> | 2016-07-01 17:22:39 (GMT) |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2017-05-27 03:17:32 (GMT) |
| commit | 02a606015d47d3c98b189dd1cfa33c7797892b4f (patch) | |
| tree | 2bc7c640bf2aaa8c5a46d89b5f33b60ba13a3164 /arch/arm64/xen/hypercall.S | |
| parent | 2a9c8df4d76ce58d1b4477aac74209843dc3f0a1 (diff) | |
| download | linux-02a606015d47d3c98b189dd1cfa33c7797892b4f.tar.xz | |
arm64: Handle faults caused by inadvertent user access with PAN enabled
When TTBR0_EL1 is set to the reserved page, an erroneous kernel access
to user space would generate a translation fault. This patch adds the
checks for the software-set PSR_PAN_BIT to emulate a permission fault
and report it accordingly.
Cc: Will Deacon <will.deacon@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit 786889636ad75296c213547d1ca656af4c59f390)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
Diffstat (limited to 'arch/arm64/xen/hypercall.S')
0 files changed, 0 insertions, 0 deletions