linux-kernel - Re: [PATCH] ARM: ubsan: select ARCH_HAS_UBSAN_SANITIZE

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Message-ID: <2d9fb6c3-c331-b663-1789-b4c9d7f75483@gmail.com>
Date:   Wed, 12 Oct 2022 12:46:31 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Florian Fainelli <f.fainelli@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Seung-Woo Kim <sw0312.kim@...sung.com>,
        Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>,
        Ard Biesheuvel <ardb@...nel.org>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        "Steven Rostedt (Google)" <rostedt@...dmis.org>,
        Nick Hawkins <nick.hawkins@....com>,
        John Crispin <john@...ozen.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Nicolas Schier <n.schier@....de>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        open list <linux-kernel@...r.kernel.org>,
        bcm-kernel-feedback-list@...adcom.com, anand.gore@...adcom.com,
        william.zhang@...adcom.com
Subject: Re: [PATCH] ARM: ubsan: select ARCH_HAS_UBSAN_SANITIZE_ALL

On 10/4/22 01:51, Linus Walleij wrote:
> On Wed, Sep 28, 2022 at 7:47 PM Florian Fainelli <f.fainelli@...il.com> wrote:
> 
>> From: Seung-Woo Kim <sw0312.kim@...sung.com>
>>
>> To enable UBSAN on ARM, this patch enables ARCH_HAS_UBSAN_SANITIZE_ALL
>> from arm confiuration. Basic kernel bootup test is passed on arm with
>> CONFIG_UBSAN_SANITIZE_ALL enabled.
>>
>> Signed-off-by: Seung-Woo Kim <sw0312.kim@...sung.com>
>> [florian: rebased against v6.0-rc7]
>> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
> 
> Pretty cool that it "just works", I was thinking to myself that I
> should try this one
> day. Sorry I was late to look at the patch.
> 
> Have you also looked at KCSAN?

Not yet, that would be next. Most often, at least for ARCH_BRCMSTB the 
same hardware and set of drivers run on ARM64 which is typically much 
more feature full, so we get coverage on *SAN features that way.
--
Florian