linux-kernel - Re: arm64: clang-nightly: net/ipv4/tcp_input.c: clang: error: clang frontend command failed with exit code 139

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Date:   Mon, 14 Feb 2022 08:35:29 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     open list <linux-kernel@...r.kernel.org>, llvm@...ts.linux.dev,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>
Subject: Re: arm64: clang-nightly: net/ipv4/tcp_input.c: clang: error: clang
 frontend command failed with exit code 139

Hi Naresh,

On Mon, Feb 14, 2022 at 12:27:17PM +0530, Naresh Kamboju wrote:
> On Linux mainline master branch with arm64 clang-nightly build failed
> due to following errors and warnings.
> 
> make --silent --keep-going --jobs=8
> O=/home/tuxbuild/.cache/tuxmake/builds/current LLVM=1 LLVM_IAS=1
> ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
> CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- HOSTCC=clang CC=clang
> PLEASE submit a bug report to
> https://github.com/llvm/llvm-project/issues/ and include the crash
> backtrace, preprocessed source, and associated run script.
> Stack dump:

<snip>

> 1. <eof> parser at end of file
> 2. Code generation
> 3. Running pass 'Function Pass Manager' on module
> '/builds/linux/net/ipv4/tcp_input.c'.

<snip>

> I have reported this a new issues on github,
> https://github.com/llvm/llvm-project/issues/53811

Thank you for the report! I found this over the weekend myself and
reverted the problematic commit in LLVM and I will make sure that if it
lands again, it can build a kernel without any issues.

https://github.com/llvm/llvm-project/commit/22eb1dae3fb20ca8ada865de1d95baab0e08a060

For the future, you may consider only sending reports of compiler
crashes to Nick, myself, and llvm@...ts.linux.dev; a compiler crash is
pretty much never the fault of the source code so CC'ing Linux
maintainers is just noise.

Cheers,
Nathan