[LTP] ❌ FAIL: Test report for kernel 5.4.0-rc2-d6c2c23.cki (stable-next)

[Vincenzo Frascino]

On 10/16/19 5:29 AM, Will Deacon wrote:
> From 517d979e84191ae9997c9513a88a5b798af6912f Mon Sep 17 00:00:00 2001
> From: Will Deacon <will@kernel.org>
> Date: Tue, 15 Oct 2019 21:04:18 -0700
> Subject: [PATCH] arm64: tags: Preserve tags for addresses translated via TTBR1
> 
> Sign-extending TTBR1 addresses when converting to an untagged address
> breaks the documented POSIX semantics for mlock() in some obscure error
> cases where we end up returning -EINVAL instead of -ENOMEM as a direct
> result of rewriting the upper address bits.
> 
> Rework the untagged_addr() macro to preserve the upper address bits for
> TTBR1 addresses and only clear the tag bits for user addresses. This
> matches the behaviour of the 'clear_address_tag' assembly macro, so
> rename that and align the implementations at the same time so that they
> use the same instruction sequences for the tag manipulation.
> 
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Link: https://lore.kernel.org/stable/20191014162651.GF19200@arrakis.emea.arm.com/
> Reported-by: Jan Stancek <jstancek@redhat.com>
> Signed-off-by: Will Deacon <will@kernel.org>
> ---
>  arch/arm64/include/asm/asm-uaccess.h |  7 +++----
>  arch/arm64/include/asm/memory.h      | 10 ++++++++--
>  arch/arm64/kernel/entry.S            |  4 ++--
>  3 files changed, 13 insertions(+), 8 deletions(-)
> 

Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>

-- 
Regards,
Vincenzo