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Date:      Mon, 16 Apr 2018 16:43:57 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 227558] bhyve assertion failed when writing ACPI tables
Message-ID:  <bug-227558-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D227558

            Bug ID: 227558
           Summary: bhyve assertion failed when writing ACPI tables
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: domagoj.stolfa@gmail.com

When bhyve is run using:

bhyveload -d test.img -m <anything> test
bhyve -A -H -P -s 0:0,hostbridge -s 1:0,lpc -s 2:0,virtio-blk,./test.img -l
com1,stdio -c <any> -m <anything> -t test

the "bhyve" process aborts with an assertion:

Assertion failed: (error =3D=3D 0), function main, file
/home/dstolfa/freebsd-head/usr.sbin/bhyve/bhyverun.c, line 1096.

I have traced the error to the vfprintf in dsdt_line() inside acpi.c, howev=
er I
have not been able to use gdb from ports or lldb to debug this effectively =
due
to various freezes that I've experienced (not gaining control back in the
debugger or failing to execute the child in lldb's case).

Adding a number of printfs, namely printf("%s\n", bf->f_name); when creating
the temporary files removes the bug, but so does adding printfs when the VM
shuts down which leads me to believe that this is in fact a code segment
corruption rather than a race.

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