Re: [nf:master 1/9] arch/x86/tools/insn_decoder_test: warning: ffffffff817c07c3: 0f ff e9 ud0 %ecx,%ebp

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On Wed 07-02-18 10:16:31, Wu Fengguang wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf.git master
> head:   b408c5b04f82fe4e20bceb8e4f219453d4f21f02
> commit: 0537250fdc6c876ed4cbbe874c739aebef493ee2 [1/9] netfilter: x_tables: make allocation less aggressive
> config: x86_64-rhel-7.2 (attached as .config)
> compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
> reproduce:
>         git checkout 0537250fdc6c876ed4cbbe874c739aebef493ee2
>         # save the attached .config to linux build tree
>         make ARCH=x86_64 
> 
> All warnings (new ones prefixed by >>):
> 
>    arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
>    arch/x86/tools/insn_decoder_test: warning: ffffffff817aed81:	0f ff c3             	ud0    %ebx,%eax

I really fail to see how the above patch could have made any difference.
I am even not sure what the actual bug is, to be honest.

-- 
Michal Hocko
SUSE Labs
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