linux-kernel - Re: [PATCH] mctp: fix use after free

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Message-ID: <CAKwvOd=ntKk7PwtYKWCV_44nf9ccCVDKiGJk_wB4yqfvPFDUbw@mail.gmail.com>
Date:   Tue, 15 Feb 2022 11:42:03 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Tom Rix <trix@...hat.com>, Jeremy Kerr <jk@...econstruct.com.au>
Cc:     matt@...econstruct.com.au, davem@...emloft.net, kuba@...nel.org,
        nathan@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] mctp: fix use after free

On Mon, Feb 14, 2022 at 6:16 PM Tom Rix <trix@...hat.com> wrote:
>
>
> On 2/14/22 4:44 PM, Jeremy Kerr wrote:
> > Hi Tom,
> >
> > Also, can you share how you're doing the clang static analysis there?
> > I'll get that included in my checks too.
>
> build clang, then use it
>
> scan-build \
>      --use-cc=clang \
>      make CC=clang

I'm pretty sure we have a make target in Kbuild, too. It uses
clang-tidy as the driver, as clang-tidy can do BOTH the static
analyses AND clang-tidy checks.

$ make LLVM=1 all clang-analyzer

>
> There are a couple of configs that aren't happy with clang, these you
> can sed away with
>
> sed -e 's/CONFIG_FRAME_WARN=2048/CONFIG_FRAME_WARN=0/;
> s/CONFIG_RETPOLINE=y/CONFIG_RETPOLINE=n/;
> s/CONFIG_READABLE_ASM=y/CONFIG_READABLE_ASM=n/;
> s/CONFIG_FORTIFY_SOURCE=y/CONFIG_FORTIFY_SOURCE=n/'
>
> I am using clang 14

-- 
Thanks,
~Nick Desaulniers