From: Mark Rutland <mark.rutland@arm.com>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Kees Cook <keescook@chromium.org>,
kernel-hardening@lists.openwall.com, andre.przywara@arm.com,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Will Deacon <will.deacon@arm.com>,
AKASHI Takahiro <takahiro.akashi@linaro.org>,
James Morse <james.morse@arm.com>,
suzuki.poulose@arm.com, linux-arm-kernel@lists.infradead.org
Subject: [kernel-hardening] Re: [PATCH v3 0/7] arm64: Privileged Access Never using TTBR0_EL1 switching
Date: Thu, 15 Sep 2016 17:41:14 +0100 [thread overview]
Message-ID: <20160915164114.GC19214@leverpostej> (raw)
In-Reply-To: <20160915162044.GB19214@leverpostej>
On Thu, Sep 15, 2016 at 05:20:45PM +0100, Mark Rutland wrote:
> Don't we need to fix up do_sysinstr() (which performs raw cache
> maintenance ops on __user addresses) with
> uaccess_{enable,disable}_not_uao()?
Actually, we don't even need to do anything in the case of PAN since
cache ops aren't affected by PAN/UAO; we just need to map/unmap in the
TTBR0-switching case to ensure we don't get stup fixing things up
forever.
/me commences name bikeshedding.
Thanks,
Mark.
WARNING: multiple messages have this Message-ID (diff)
From: mark.rutland@arm.com (Mark Rutland)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/7] arm64: Privileged Access Never using TTBR0_EL1 switching
Date: Thu, 15 Sep 2016 17:41:14 +0100 [thread overview]
Message-ID: <20160915164114.GC19214@leverpostej> (raw)
In-Reply-To: <20160915162044.GB19214@leverpostej>
On Thu, Sep 15, 2016 at 05:20:45PM +0100, Mark Rutland wrote:
> Don't we need to fix up do_sysinstr() (which performs raw cache
> maintenance ops on __user addresses) with
> uaccess_{enable,disable}_not_uao()?
Actually, we don't even need to do anything in the case of PAN since
cache ops aren't affected by PAN/UAO; we just need to map/unmap in the
TTBR0-switching case to ensure we don't get stup fixing things up
forever.
/me commences name bikeshedding.
Thanks,
Mark.
next prev parent reply other threads:[~2016-09-15 16:41 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-13 17:46 [kernel-hardening] [PATCH v3 0/7] arm64: Privileged Access Never using TTBR0_EL1 switching Catalin Marinas
2016-09-13 17:46 ` Catalin Marinas
2016-09-13 17:46 ` [kernel-hardening] [PATCH v3 1/7] arm64: Factor out PAN enabling/disabling into separate uaccess_* macros Catalin Marinas
2016-09-13 17:46 ` Catalin Marinas
2016-09-15 15:10 ` [kernel-hardening] " Mark Rutland
2016-09-15 15:10 ` Mark Rutland
2016-09-13 17:46 ` [kernel-hardening] [PATCH v3 2/7] arm64: Factor out TTBR0_EL1 post-update workaround into a specific asm macro Catalin Marinas
2016-09-13 17:46 ` Catalin Marinas
2016-09-15 15:19 ` [kernel-hardening] " Mark Rutland
2016-09-15 15:19 ` Mark Rutland
2016-09-13 17:46 ` [kernel-hardening] [PATCH v3 3/7] arm64: Introduce uaccess_{disable,enable} functionality based on TTBR0_EL1 Catalin Marinas
2016-09-13 17:46 ` [PATCH v3 3/7] arm64: Introduce uaccess_{disable, enable} " Catalin Marinas
2016-09-13 20:45 ` [kernel-hardening] Re: [PATCH v3 3/7] arm64: Introduce uaccess_{disable,enable} " Kees Cook
2016-09-13 20:45 ` Kees Cook
2016-09-14 8:52 ` [kernel-hardening] " Mark Rutland
2016-09-14 8:52 ` Mark Rutland
2016-09-14 16:27 ` [kernel-hardening] " Kees Cook
2016-09-14 16:27 ` Kees Cook
2016-09-13 17:46 ` [kernel-hardening] [PATCH v3 4/7] arm64: Disable TTBR0_EL1 during normal kernel execution Catalin Marinas
2016-09-13 17:46 ` Catalin Marinas
2016-09-14 16:45 ` [kernel-hardening] " Will Deacon
2016-09-14 16:45 ` Will Deacon
2016-09-13 17:46 ` [kernel-hardening] [PATCH v3 5/7] arm64: Handle faults caused by inadvertent user access with PAN enabled Catalin Marinas
2016-09-13 17:46 ` Catalin Marinas
2016-09-16 11:33 ` [kernel-hardening] " Mark Rutland
2016-09-16 11:33 ` Mark Rutland
2016-09-16 15:55 ` [kernel-hardening] " Catalin Marinas
2016-09-16 15:55 ` Catalin Marinas
2016-09-13 17:46 ` [kernel-hardening] [PATCH v3 6/7] arm64: xen: Enable user access before a privcmd hvc call Catalin Marinas
2016-09-13 17:46 ` Catalin Marinas
2016-09-13 17:46 ` [kernel-hardening] [PATCH v3 7/7] arm64: Enable CONFIG_ARM64_SW_TTBR0_PAN Catalin Marinas
2016-09-13 17:46 ` Catalin Marinas
2016-09-14 10:13 ` [kernel-hardening] Re: [PATCH v3 0/7] arm64: Privileged Access Never using TTBR0_EL1 switching Ard Biesheuvel
2016-09-14 10:13 ` Ard Biesheuvel
2016-09-14 10:27 ` [kernel-hardening] " Mark Rutland
2016-09-14 10:27 ` Mark Rutland
2016-09-14 10:30 ` [kernel-hardening] " Ard Biesheuvel
2016-09-14 10:30 ` Ard Biesheuvel
2016-09-14 10:36 ` [kernel-hardening] " Mark Rutland
2016-09-14 10:36 ` Mark Rutland
2016-09-14 10:48 ` [kernel-hardening] " Mark Rutland
2016-09-14 10:48 ` Mark Rutland
2016-09-14 20:54 ` [kernel-hardening] " David Brown
2016-09-14 20:54 ` David Brown
2016-09-15 9:52 ` Catalin Marinas
2016-09-15 9:52 ` Catalin Marinas
2016-09-15 16:20 ` [kernel-hardening] " Mark Rutland
2016-09-15 16:20 ` Mark Rutland
2016-09-15 16:41 ` Mark Rutland [this message]
2016-09-15 16:41 ` Mark Rutland
2016-09-29 22:44 ` [kernel-hardening] " Sami Tolvanen
2016-09-29 22:44 ` Sami Tolvanen
2016-09-30 18:42 ` Kees Cook
2016-09-30 18:42 ` Kees Cook
2016-10-27 14:54 ` Catalin Marinas
2016-10-27 14:54 ` Catalin Marinas
2016-10-27 21:23 ` Kees Cook
2016-10-27 21:23 ` Kees Cook
2016-10-14 21:44 ` Kees Cook
2016-10-14 21:44 ` Kees Cook
2016-10-15 14:35 ` [kernel-hardening] " Catalin Marinas
2016-10-15 14:35 ` Catalin Marinas
2016-10-16 2:04 ` [kernel-hardening] " Kees Cook
2016-10-16 2:04 ` Kees Cook
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