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From:   Masahiro Yamada <masahiroy@kernel.org>
Date:   Thu, 14 Jan 2021 02:57:17 +0900
Message-ID: <CAK7LNASs6dvU6D3jL2GG3jW58fXfaj6VNOe55NJnTB8UPuk2pA@mail.gmail.com>
Subject: Re: [PATCH] compiler.h: Raise minimum version of GCC to 5.1 for arm64
To:     Catalin Marinas <catalin.marinas@arm.com>
Cc:     linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        Will Deacon <will@kernel.org>, Arnd Bergmann <arnd@kernel.org>,
        Russell King <linux@armlinux.org.uk>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        "Theodore Ts'o" <tytso@mit.edu>,
        "Cc: Android Kernel" <kernel-team@android.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Florian Weimer <fweimer@redhat.com>
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On Thu, Jan 14, 2021 at 1:08 AM Catalin Marinas <catalin.marinas@arm.com> wrote:
>
> On Tue, 12 Jan 2021 22:48:32 +0000, Will Deacon wrote:
> > GCC versions >= 4.9 and < 5.1 have been shown to emit memory references
> > beyond the stack pointer, resulting in memory corruption if an interrupt
> > is taken after the stack pointer has been adjusted but before the
> > reference has been executed. This leads to subtle, infrequent data
> > corruption such as the EXT4 problems reported by Russell King at the
> > link below.
> >
> > [...]
>
> Applied to arm64 (for-next/fixes), thanks!
>
> [1/1] compiler.h: Raise minimum version of GCC to 5.1 for arm64
>       https://git.kernel.org/arm64/c/1f1244a5ddb7
>
> --
> Catalin
>


Maybe, we can raise the minimal version to gcc 5.1
for all architectures.


-- 
Best Regards
Masahiro Yamada