Re: [PATCH v5 3.1.0-rc4-tip 17/26] x86: arch specific hooks forpre/post singlestep handling.

[Peter Zijlstra]

On Tue, 2011-09-20 at 17:33 +0530, Srikar Dronamraju wrote:
> +fail:
> +       pr_warn_once("uprobes: Failed to adjust return address after"
> +               " single-stepping call instruction;"
> +               " pid=%d, sp=%#lx\n", current->pid, sp);
> +       return -EFAULT; 

So how can that happen? Single-Step while someone unmapped the stack?
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