linux-kernel - Re: [PATCH v2] arch: fix broken BuildID for arm64 and riscv

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Message-ID: <bb976dd2-490c-a2a0-6c46-65ab79a413b2@leemhuis.info>
Date:   Mon, 2 Jan 2023 08:08:17 +0100
From:   "Linux kernel regression tracking (#info)" 
        <regressions@...mhuis.info>
To:     Nathan Chancellor <nathan@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-arch@...r.kernel.org, linux-kbuild@...r.kernel.org,
        linux-kernel@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, Dennis Gilmore <dennis@...il.us>,
        Albert Ou <aou@...s.berkeley.edu>,
        Arnd Bergmann <arnd@...db.de>,
        Jisheng Zhang <jszhang@...nel.org>,
        Nicolas Schier <nicolas@...sle.eu>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>, llvm@...ts.linux.dev
Subject: Re: [PATCH v2] arch: fix broken BuildID for arm64 and riscv

[TLDR: I'm adding this report to the list of tracked Linux kernel
regressions; all text you find below is based on a few templates
paragraphs you might have encountered already already in similar form.
See link in footer if these mails annoy you.]

On 02.01.23 05:16, Nathan Chancellor wrote:
> On Tue, Dec 27, 2022 at 03:45:37AM +0900, Masahiro Yamada wrote:
>> Dennis Gilmore reports that the BuildID is missing in the arm64 vmlinux
>> since commit 994b7ac1697b ("arm64: remove special treatment for the
>> link order of head.o").
> [...]
> I just bisected this change as the cause of a few link failures that we
> now see in CI with Debian's binutils (2.35.2):
> 
> https://storage.tuxsuite.com/public/clangbuiltlinux/continuous-integration2/builds/2Jjl88DXc3YRi2RtvXAzlS8NQ4p/build.log
> 
> This does not appear to be related to clang/LLVM because I can easily
> reproduce it with Debian's s390x GCC and binutils building defconfig:
> 
> [...]
> 
> I ended up bisecting binutils for the fix, as I could not reproduce it
> with 2.36+. My bisect landed on commit 21401fc7bf6 ("Duplicate output
> sections in scripts"):
> 
> https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=21401fc7bf67dbf73f4a3eda4bcfc58fa4211584
> 
> Unfortunately, I cannot immediately grok why this commit cause the above
> issue nor why the binutils commit resolves it so I figured I would
> immediately report it for public investigation's sake and quicker
> resolution.

Thanks for the report. To be sure the issue doesn't fall through the
cracks unnoticed, I'm adding it to regzbot, the Linux kernel regression
tracking bot:

#regzbot ^introduced 99cb0d917ffa1ab628bb67364ca9b162c07699b1
#regzbot title arch: link failures in CI with Debian's binutils
#regzbot ignore-activity

This isn't a regression? This issue or a fix for it are already
discussed somewhere else? It was fixed already? You want to clarify when
the regression started to happen? Or point out I got the title or
something else totally wrong? Then just reply and tell me -- ideally
while also telling regzbot about it, as explained by the page listed in
the footer of this mail.

Reminder for developers: When fixing the issue, add 'Link:' tags
pointing to the report (see page linked in footer for details).

Ciao, Thorsten
-- 
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