linux-kernel - linux-next: build failure after merge of the akpm-current tree

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Date:   Mon, 5 Jun 2017 17:01:17 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Daniel Micay <danielmicay@...il.com>,
        Kees Cook <keescook@...omium.org>
Subject: linux-next: build failure after merge of the akpm-current tree

Hi Andrew,

After merging the akpm-current tree, today's linux-next build (x86_64
allmodconfig) failed like this:

sound/pcmcia/pdaudiocf/pdaudiocf.o: warning: objtool: .text: unexpected end of section
arch/x86/ras/mce_amd_inj.o: warning: objtool: inj_readme_read() falls through to next function extcpu_fops_open()
sound/sound_core.o: warning: objtool: register_sound_special_device() falls through to next function register_sound_special()

and many more like those. Also:

In file included from /home/sfr/next/next/include/linux/bitmap.h:8:0,
                 from /home/sfr/next/next/include/linux/cpumask.h:11,
                 from /home/sfr/next/next/arch/x86/include/asm/cpumask.h:4,
                 from /home/sfr/next/next/arch/x86/include/asm/msr.h:10,
                 from /home/sfr/next/next/arch/x86/include/asm/processor.h:20,
                 from /home/sfr/next/next/arch/x86/include/asm/cpufeature.h:4,
                 from /home/sfr/next/next/arch/x86/include/asm/thread_info.h:52,
                 from /home/sfr/next/next/include/linux/thread_info.h:37,
                 from /home/sfr/next/next/arch/x86/include/asm/preempt.h:6,
                 from /home/sfr/next/next/include/linux/preempt.h:80,
                 from /home/sfr/next/next/include/linux/spinlock.h:50,
                 from /home/sfr/next/next/include/linux/mmzone.h:7,
                 from /home/sfr/next/next/include/linux/gfp.h:5,
                 from /home/sfr/next/next/arch/x86/power/hibernate_64.c:11:
In function 'memcpy',
    inlined from 'relocate_restore_code' at /home/sfr/next/next/arch/x86/power/hibernate_64.c:150:2,
    inlined from 'swsusp_arch_resume' at /home/sfr/next/next/arch/x86/power/hibernate_64.c:185:8:
/home/sfr/next/next/include/linux/string.h:309:4: error: call to '__read_overflow2' declared with attribute error: detected read beyond size of object passed as 2nd parameter
    __read_overflow2();
    ^

Caused by commit

  088a5ecf7581 ("include/linux/string.h: add the option of fortified string.h functions")

We really need to fix all the known problems it detects *before*
merging this commit ...

I have reverted it for today.
-- 
Cheers,
Stephen Rothwell