linux-kernel - Re: /tmp/ccTcF8pg.s: Error: .size expression for aes_p8_set_encrypt

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Date:	Mon, 18 Apr 2016 17:08:41 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	kbuild test robot <fengguang.wu@...el.com>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: /tmp/ccTcF8pg.s: Error: .size expression for
	aes_p8_set_encrypt_key does not evaluate to a constant

On 04/17, kbuild test robot wrote:
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   b9f5dba225aede4518ab0a7374c2dc38c7c049ce
> commit: 5eeb50de42fd3251845d03c556db012267c72b3f uprobes: Change handle_trampoline() to flush the frames invalidated by longjmp()
> date:   9 months ago

and this patch changed the single function in arch-neutral kernel/events/uprobes.c,
this certainly looks like a false positive.

> config: powerpc-allyesconfig (attached as .config)
> reproduce:
>         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git checkout 5eeb50de42fd3251845d03c556db012267c72b3f
>         # save the attached .config to linux build tree
>         make.cross ARCH=powerpc 
> 
> All errors (new ones prefixed by >>):
> 
>    /tmp/ccTcF8pg.s: Assembler messages:
> >> /tmp/ccTcF8pg.s: Error: .size expression for aes_p8_set_encrypt_key does not evaluate to a constant
> >> /tmp/ccTcF8pg.s: Error: .size expression for .aes_p8_set_encrypt_key does not evaluate to a constant
> >> /tmp/ccTcF8pg.s: Error: .size expression for aes_p8_set_decrypt_key does not evaluate to a constant
> >> /tmp/ccTcF8pg.s: Error: .size expression for .aes_p8_set_decrypt_key does not evaluate to a constant
> >> /tmp/ccTcF8pg.s: Error: .size expression for aes_p8_encrypt does not evaluate to a constant
> >> /tmp/ccTcF8pg.s: Error: .size expression for .aes_p8_encrypt does not evaluate to a constant
> >> /tmp/ccTcF8pg.s: Error: .size expression for aes_p8_decrypt does not evaluate to a constant
> >> /tmp/ccTcF8pg.s: Error: .size expression for .aes_p8_decrypt does not evaluate to a constant
> >> /tmp/ccTcF8pg.s: Error: .size expression for aes_p8_cbc_encrypt does not evaluate to a constant
> >> /tmp/ccTcF8pg.s: Error: .size expression for .aes_p8_cbc_encrypt does not evaluate to a constant
> >> /tmp/ccTcF8pg.s: Error: .size expression for aes_p8_ctr32_encrypt_blocks does not evaluate to a constant
> >> /tmp/ccTcF8pg.s: Error: .size expression for .aes_p8_ctr32_encrypt_blocks does not evaluate to a constant
> --
>    /tmp/ccB2I6Jo.s: Assembler messages:
> >> /tmp/ccB2I6Jo.s: Error: .size expression for gcm_init_p8 does not evaluate to a constant
> >> /tmp/ccB2I6Jo.s: Error: .size expression for .gcm_init_p8 does not evaluate to a constant
> >> /tmp/ccB2I6Jo.s: Error: .size expression for gcm_gmult_p8 does not evaluate to a constant
> >> /tmp/ccB2I6Jo.s: Error: .size expression for .gcm_gmult_p8 does not evaluate to a constant
> >> /tmp/ccB2I6Jo.s: Error: .size expression for gcm_ghash_p8 does not evaluate to a constant
> >> /tmp/ccB2I6Jo.s: Error: .size expression for .gcm_ghash_p8 does not evaluate to a constant
> 
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
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