From: Catalin Marinas <catalin.marinas@arm.com>
To: linux-kernel@vger.kernel.org,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
linux-arm-kernel@lists.infradead.org, kasan-dev@googlegroups.com
Cc: Will Deacon <will@kernel.org>,
stable@vger.kernel.org, Mark Rutland <mark.rutland@arm.com>
Subject: Re: [PATCH] arm64: Fix kernel address detection of __is_lm_address()
Date: Wed, 27 Jan 2021 13:09:54 +0000 [thread overview]
Message-ID: <161175296410.16506.3810718723675940477.b4-ty@arm.com> (raw)
In-Reply-To: <20210126134056.45747-1-vincenzo.frascino@arm.com>
On Tue, 26 Jan 2021 13:40:56 +0000, Vincenzo Frascino wrote:
> Currently, the __is_lm_address() check just masks out the top 12 bits
> of the address, but if they are 0, it still yields a true result.
> This has as a side effect that virt_addr_valid() returns true even for
> invalid virtual addresses (e.g. 0x0).
>
> Fix the detection checking that it's actually a kernel address starting
> at PAGE_OFFSET.
Applied to arm64 (for-next/fixes), thanks!
[1/1] arm64: Fix kernel address detection of __is_lm_address()
https://git.kernel.org/arm64/c/519ea6f1c82f
--
Catalin
prev parent reply other threads:[~2021-01-27 13:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-26 13:40 [PATCH] arm64: Fix kernel address detection of __is_lm_address() Vincenzo Frascino
2021-01-26 16:36 ` Catalin Marinas
2021-01-26 18:37 ` Vincenzo Frascino
2021-01-27 13:09 ` Catalin Marinas [this message]
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