Re: [GIT PULL] x86/kaslr for v3.14

From: H. Peter Anvin
Date: Mon Jan 20 2014 - 18:14:23 EST

On 01/20/2014 03:12 PM, Linus Torvalds wrote:
> On Mon, Jan 20, 2014 at 2:54 PM, Linus Torvalds
> <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>> So I pulled this, but one question:
> .. oh, and since I decided to test it, and was looking for problems:
> enabling kaslr breaks "perf". The *profile* looks fine, but the
> disassembly doesn't work.
> I'm not entirely surprised. I decided I wanted to test it for a
> reason, after all. So it's not unexpected, but perhaps people hadn't
> thought about it, and clearly hadn't tested it.
> Kernel modules disassemble fine, so clearly perf knows about code that
> moves around, but apparently it gets surprised when the core vmlinux
> file disassembly doesn't match addresses.

So this is presumably something that needs to be fixed in perf?


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