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Re: CVS commit: src/tests/lib/libc/gen (address alignment)

On Fri, 20 Apr 2012 15:33:05 -0700 (PDT), Paul Goyette wrote:
On Fri, 20 Apr 2012, Paul Goyette wrote:

XXX I would appreciate if someone could test it under a real amd64 host with an up-to-date kernel, so I can reasonably assume that the culprit is Virtual Box and not our amd64 port (my test machine being off line I cannot do it myself). Results from other arches would be a plus too.

I just updated one of my machines (running a bulldozer FX-8150) to -current from an hour ago (with the most up-to-date rev of psl.h) and ran atf-run on the libc/gen tests. The machine hung solid at this point:

        t_siginfo (28/32): 8 test cases
            sigalarm: [1.006950s] Passed.

and I am no longer able to telnet into the box from elsewhere. I am not physically at the machine, so I cannot tell if it has dropped into ddb.

The machine did not drop into ddb, it simply rebooted.  Unfortunately
it did not leave a core dump behind, so I don't have much to look at
just yet.  When I get home later today, I will try to get more info.

BTW, this occurred while running the ATF test from a non-privileged
user, so if there's a bug lurking in these recent changes, it could be
considered to be a security vulnerability - non-priv user should not
be able to crash the box...


Okay, thanks for the report. So this rules out Virtual Box, it seems to happen on native amd64 too.

I am taking a look right now.

Jean-Yves Migeon

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