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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=lCP1WO1+VHzaoW6B3s0gmUP2QnpBjOsDZXHhfza/ed8=; b=ceVyn1WfcdlgB8tilI+oHLoEq6JBEeAW7C4tiwMGgn6sYSaBBpDe7wiA0Iuie6Rh/8 gIm01eKx0/8Cs8xntVr1AnjTpJqvWA+u+fd6sBMi1ZuN7FYPxvRFHytuB4jgFjVkT/Aa mfimiUh3QCEZD2shLssmy/RzFu38BV9kx9OkSA1EwMUun0lF/tuPspwRl0DIWY5OaNvj IAGSKzcfjhwxGJb6pM+7702v48dba3mb3JFdq70x3GMFRfWhxFJTUsQF6ll0T0a2XjjW Muz2pYkv+mGrLWyvIbXl/5YJXX/BKS70Pklj8ByfCBRw5dhUfah92ZiuByYH85qQ9Zwb ATWg== X-Gm-Message-State: AOAM531H3CAZGzmdx3DhYV4eAGI3RCYIFlrCXhKSnkPsp2spHW1BY/gp rgI+oMroS4UCyjGRPAOhkJ6cjzBVT3MZYhetFE6byA== X-Google-Smtp-Source: ABdhPJzbQAUJk0kVFK3CtTs1GowkCphU5iW79ZzmaFBk380eaBTxf6iWXo14Dh/UKx+4MymCnOiVLxpRA+Ly/HIOhCU= X-Received: by 2002:a17:90b:807:: with SMTP id bk7mr1438790pjb.166.1604001649764; Thu, 29 Oct 2020 13:00:49 -0700 (PDT) MIME-Version: 1.0 References: <1049f02fb4132390a6a314eb21dccfe5500e69d6.1603372719.git.andreyknvl@google.com> In-Reply-To: From: Andrey Konovalov Date: Thu, 29 Oct 2020 21:00:38 +0100 Message-ID: Subject: Re: [PATCH RFC v2 05/21] kasan: allow VMAP_STACK for HW_TAGS mode To: Dmitry Vyukov X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201029_160051_992230_C053F091 X-CRM114-Status: GOOD ( 19.77 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marco Elver , Elena Petrova , Linux-MM , Catalin Marinas , Kevin Brodsky , Will Deacon , Branislav Rankov , kasan-dev , LKML , Kostya Serebryany , Alexander Potapenko , Linux ARM , Serban Constantinescu , Andrey Ryabinin , Andrew Morton , Vincenzo Frascino , Peter Collingbourne , Evgenii Stepanov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Oct 27, 2020 at 1:49 PM Dmitry Vyukov wrote: > > On Thu, Oct 22, 2020 at 3:19 PM Andrey Konovalov wrote: > > > > Even though hardware tag-based mode currently doesn't support checking > > vmalloc allocations, it doesn't use shadow memory and works with > > VMAP_STACK as is. > > > > Signed-off-by: Andrey Konovalov > > Link: https://linux-review.googlesource.com/id/I3552cbc12321dec82cd7372676e9372a2eb452ac > > --- > > arch/Kconfig | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/arch/Kconfig b/arch/Kconfig > > index af14a567b493..3caf7bcdcf93 100644 > > --- a/arch/Kconfig > > +++ b/arch/Kconfig > > @@ -868,7 +868,7 @@ config VMAP_STACK > > default y > > bool "Use a virtually-mapped stack" > > depends on HAVE_ARCH_VMAP_STACK > > - depends on !KASAN || KASAN_VMALLOC > > + depends on !(KASAN_GENERIC || KASAN_SW_TAGS) || KASAN_VMALLOC > > I find it a bit simpler to interpret: > > depends on !KASAN || KASAN_HW_TAGS || KASAN_VMALLOC > > due to simpler structure. But maybe it's just me. This looks better, will fix in the next version, thanks! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel