user namespace: make signal.c respect user namespaces (v5)
Eric W. Biederman
ebiederm at xmission.com
Sat Nov 19 04:53:12 UTC 2011
Serge Hallyn <serge.hallyn at canonical.com> writes:
> Quoting Eric W. Biederman (ebiederm at xmission.com):
>> "Serge E. Hallyn" <serge.hallyn at canonical.com> writes:
>>
>> > Quoting Eric W. Biederman (ebiederm at xmission.com):
>> >> There is a small bug here. You want to fixup q->info, not info.
>> >> Otherwise you might try dereferencing one of the special signals and get
>> >> a NULL pointer dereference.
>> >
>> > Thanks, Eric. Oddly I've not seen this happen in quite a bit of
>> > testing with the kernel, but you certainly must be right. I sent
>> > out a new patch to fix that.
>>
>> You clearly have a different test case than I do.
>
> I ran a good chunk of ltp... and it passed. I can't explain it.
I guess my test case as mostly dinking around and hitting ctrl-c because
something wasn't behaving as I would like.
Still I a tad surprised that ltp doesn't seem to test that one.
>> I managed to trigger the oops within about 5 minutes of just fooling
>> around.
>>
>> You want to say &q->info not q->info in your updated patch.
>
> Oh, yes, thanks. Sorry, I shouldn't have sent that one as I wasn't able
> to compile and test until tonight.
No problem.
Eric
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