linux-kernel - Re: [PATCH v2 3/3] x86/fpu: reinitialize FPU registers if restoring FPU state fails

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Date:   Sat, 23 Sep 2017 01:05:48 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Eric Biggers <ebiggers3@...il.com>
Cc:     kbuild-all@...org, x86@...nel.org, linux-kernel@...r.kernel.org,
        kernel-hardening@...ts.openwall.com,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Ingo Molnar <mingo@...nel.org>, Kevin Hao <haokexin@...il.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Wanpeng Li <wanpeng.li@...mail.com>,
        Yu-cheng Yu <yu-cheng.yu@...el.com>,
        Michael Halcrow <mhalcrow@...gle.com>,
        Eric Biggers <ebiggers@...gle.com>
Subject: Re: [PATCH v2 3/3] x86/fpu: reinitialize FPU registers if restoring
 FPU state fails

Hi Eric,

[auto build test ERROR on tip/auto-latest]
[also build test ERROR on v4.14-rc1 next-20170922]
[cannot apply to tip/x86/core]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Eric-Biggers/x86-fpu-prevent-leaking-FPU-registers-via-invalid-FPU-state/20170922-225341
config: x86_64-kexec (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

>> ERROR: "__handle_bad_fpstate" [arch/x86/kvm/kvm.ko] undefined!

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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