| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 093/114] arm64: Add sysfs vulnerability show for spectre-v1 | Date | Thu, 10 Oct 2019 10:36:40 +0200 |
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From: Mian Yousaf Kaukab <ykaukab@suse.de>
[ Upstream commit 3891ebccace188af075ce143d8b072b65e90f695 ]
spectre-v1 has been mitigated and the mitigation is always active. Report this to userspace via sysfs
Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de> Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Stefan Wahren <stefan.wahren@i2se.com> Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- arch/arm64/kernel/cpu_errata.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -729,3 +729,9 @@ const struct arm64_cpu_capabilities arm6 { } }; + +ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "Mitigation: __user pointer sanitization\n"); +}
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