Re: [PATCH v2] riscv: add support for SECCOMP and SECCOMP_FILTER

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On Fri, Aug 23, 2019 at 05:30:53PM -0700, Paul Walmsley wrote:
> On Thu, 22 Aug 2019, David Abdurachmanov wrote:
> 
> > There is one failing kernel selftest: global.user_notification_signal
> 
> Is this the only failing test?  Or are the rest of the selftests skipped 
> when this test fails, and no further tests are run, as seems to be shown 
> here:
> 
>   https://lore.kernel.org/linux-riscv/CADnnUqcmDMRe1f+3jG8SPR6jRrnBsY8VVD70VbKEm0NqYeoicA@xxxxxxxxxxxxxx/
> 
> For example, looking at the source, I'd naively expect to see the 
> user_notification_closed_listener test result -- which follows right 
> after the failing test in the selftest source.  But there aren't any 
> results?
> 
> Also - could you follow up with the author of this failing test to see if 
> we can get some more clarity about what might be going wrong here?  It 
> appears that the failing test was added in commit 6a21cc50f0c7f ("seccomp: 
> add a return code to trap to userspace") by Tycho Andersen 
> <tycho@xxxxxxxx>.

So, the original email says the riscv series is tested on top of 5.2-rc7,
but just for fun, can you confirm that you're building a tree that includes
9dd3fcb0ab73 ("selftests/seccomp: Handle namespace failures gracefully")? I
assume it does, but I suspect something similar is happening, where the
environment is slightly different than expected and the test stalls.

Does it behave the same way under emulation (i.e. can I hope to
reproduce this myself?)

-- 
Kees Cook



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