On 13/12/2018 04.24, David Gibson wrote: > On Thu, Aug 30, 2018 at 04:33:48PM +0200, Marc-André Lureau wrote: >> Remove -sandbox option if the host is not capable of TSYNC, since the >> sandbox will fail at setup time otherwise. This will help libvirt, for >> ex, to figure out if -sandbox will work. >> >> Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com> > > This seems to have introduced a regression, which I found when > preparing a ppc pull request. Specifically when running with RHEL7 on > a POWER host, using "-sandbox off" which one of my tests did, causes a > cryptic error followed by a SEGV: > > $ ./ppc64-softmmu/qemu-system-ppc64 -sandbox off > qemu-system-ppc64: -sandbox off: There is no option group 'sandbox' > Segmentation fault > $ ./x86_64-softmmu/qemu-system-x86_64 -sandbox off > qemu-system-x86_64: -sandbox off: There is no option group 'sandbox' > Segmentation fault > > I think the problem is that while this wrapped one use of the sandbox > option group to produce a sensible error, it didn't do the same for > another call to qemu_opts_parse_noisily(): > > (gdb) bt > #0 0x00000000105b36d8 in opts_parse (list=0x0, params=0x3ffffffffab5 "off", > permit_abbrev=true, defaults=false, errp=0x3ffffffff080) > at util/qemu-option.c:829 > #1 0x00000000105b3b74 in qemu_opts_parse_noisily (list=<optimized out>, > params=<optimized out>, permit_abbrev=<optimized out>) at > util/qemu-option.c:890 > #2 0x0000000010024964 in main (argc=<optimized out>, argv=<optimized out>, > envp=<optimized out>) at vl.c:3589 > > I'm guessing RHEL7 triggers it because that has a version of > libseccomp that doesn't support the feature needed to complete > registration (maybe on ppc host only; I haven't had a chance to try on > an x86 RHEL7 host).
Andrea reported the same issue again today with QEMU v4.0 ... Marc-André, have you ever had another look into this issue? Thomas
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