linux-kernel - Re: [PATCH] objtool: Add fortify_panic as _

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Message-ID: <1497502161.1435.9.camel@gmail.com>
Date:   Thu, 15 Jun 2017 00:49:21 -0400
From:   Daniel Micay <danielmicay@...il.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Kees Cook <keescook@...omium.org>
Cc:     linux-kernel@...r.kernel.org, Josh Poimboeuf <jpoimboe@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] objtool: Add fortify_panic as __noreturn function

> So after that the errors (x86_64 allmodconfig build) are only:
> 
> In file included from include/linux/bitmap.h:8:0,
>                  from include/linux/cpumask.h:11,
>                  from arch/x86/include/asm/cpumask.h:4,
>                  from arch/x86/include/asm/msr.h:10,
>                  from arch/x86/include/asm/processor.h:20,
>                  from arch/x86/include/asm/cpufeature.h:4,
>                  from arch/x86/include/asm/thread_info.h:52,
>                  from include/linux/thread_info.h:37,
>                  from arch/x86/include/asm/preempt.h:6,
>                  from include/linux/preempt.h:80,
>                  from include/linux/spinlock.h:50,
>                  from include/linux/mmzone.h:7,
>                  from include/linux/gfp.h:5,
>                  from arch/x86/power/hibernate_64.c:11:
> In function 'memcpy',
>     inlined from 'relocate_restore_code' at
> arch/x86/power/hibernate_64.c:150:2,
>     inlined from 'swsusp_arch_resume' at
> arch/x86/power/hibernate_64.c:186:8:
> 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();
>     ^
> In file included from include/linux/bitmap.h:8:0,
>                  from include/linux/cpumask.h:11,
>                  from arch/x86/include/asm/cpumask.h:4,
>                  from arch/x86/include/asm/msr.h:10,
>                  from arch/x86/include/asm/processor.h:20,
>                  from arch/x86/include/asm/cpufeature.h:4,
>                  from arch/x86/include/asm/thread_info.h:52,
>                  from include/linux/thread_info.h:37,
>                  from arch/x86/include/asm/preempt.h:6,
>                  from include/linux/preempt.h:80,
>                  from include/linux/spinlock.h:50,
>                  from include/linux/mmzone.h:7,
>                  from include/linux/gfp.h:5,
>                  from include/linux/mm.h:9,
>                  from kernel/kexec_file.c:15:
> In function 'memcmp',
>     inlined from 'kexec_load_purgatory' at kernel/kexec_file.c:900:6:
> include/linux/string.h:348:4: error: call to '__read_overflow'
> declared with attribute error: detected read beyond size of object
> passed as 1st parameter
>     __read_overflow();
>     ^
> 

Kees has the remaining ones here now:

https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/log/?h=for-next/kspp

Not entirely sure what happened to the powerpc bits though.