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SubjectRe: [Uclinux-dist-devel] [PATCH -mm 1/1] ptrace: PTRACE_GETFDPIC: fix the unsafe usage of child->mm
On Mon, May 24, 2010 at 19:42, Roland McGrath wrote:
>> You mean, pass it to arch_ptrace() ?
>>
>> grep, grep, grep. I guess I understand you. We have more unsafe code
>> like this in arch/*/kernel/ptrace.c. Of course, it can be fixed without
>> doing get_task_mm() in sys_ptrace(), but perhaps it would be more clean
>> to do what you suggest.
>>
>> Roland, what do you think?
>
> The mm pointer is only used by these uncommon ptrace operations that exist
> only in certain unusual arch's (and they're all ill-advised old arch ptrace
> ABI additions, at that).

are you suggesting the FDPIC additions are ill-advised as well ?
curious how you would have implemented this if that's the case ...
-mike


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