linux-kernel - objtool crashes on clang output (drivers/hwmon/pmbus/adm1275.o)

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Message-ID: <CAK8P3a2beBPP+KX4zTfSfFPwo+7ksWZLqZzpP9BJ80iPecg3zA@mail.gmail.com>
Date:   Thu, 11 Jul 2019 14:40:06 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Josh Poimboeuf <jpoimboe@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: objtool crashes on clang output (drivers/hwmon/pmbus/adm1275.o)

During randconfig testing with clang-9, I came across an object file
that makes objtool segfault, see attachment. Let me know if you need
more information to
debug this.

I also get a ton of objtool warnings building random configurations, but Nick
mentioned that there is still a bug related to asm-goto in the build I'm using
that may be the root cause. Once I have a fixed clang-9 build, I can have a look
at those as well.

       Arnd

Download attachment "adm1275.o" of type "application/x-object" (19592 bytes)

Download attachment "config.gz" of type "application/gzip" (33240 bytes)