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From: Qian Cai <cai@lca.pw>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Ard Biesheuvel <ardb@kernel.org>, Ingo Molnar <mingo@redhat.com>,
	kasan-dev <kasan-dev@googlegroups.com>,
	linux-efi <linux-efi@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -next] x86/efi_64: fix a user-memory-access in runtime
Date: Sat, 18 Jan 2020 06:04:30 -0500	[thread overview]
Message-ID: <934E6F23-96FE-4C59-9387-9ABA2959DBBB@lca.pw> (raw)
In-Reply-To: <CAKv+Gu8WBSsG2e8bVpARcwNBrGtMLzUA+bbikHymrZsNQE6wvw@mail.gmail.com>



> On Jan 18, 2020, at 3:00 AM, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote:
> 
> Can't we just use READ_ONCE_NOCHECK() instead?

My understanding is that KASAN actually want to make sure there is a no dereference of user memory because it has security implications. Does that make no sense here?

  reply	other threads:[~2020-01-18 11:04 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-18  6:30 [PATCH -next] x86/efi_64: fix a user-memory-access in runtime Qian Cai
2020-01-18  8:00 ` Ard Biesheuvel
2020-01-18 11:04   ` Qian Cai [this message]
2020-01-18 13:34     ` Ard Biesheuvel
2020-01-18 13:37       ` Dmitry Vyukov
2020-01-18 13:41         ` Ard Biesheuvel
2020-01-27 23:29 ` kbuild test robot

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