https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=215740
--- Comment #7 from Harald Schmalzbauer <bugzilla.free...@omnilan.de> ---
Is there anybody who has checked whether the steps to reproduce show the
reported results? Meaning, is there anybody who can confirm correct behaviour
in that case?
I observed many more, at first sight completely unrelated strange errors, but
all show up as soon as one condition is true: shutting down a bhyve-guest which
had ppt in use.
Latest example:
panic: Memory modified after free 0xfffff8002486a030(48) val=0 @
0xfffff8002486a030
cpuid = 5
KDB: stack backtrace:
#0 0xffffffff805bf327 at kdb_backtrace+0x67
#1 0xffffffff8057f266 at vpanic+0x186
#2 0xffffffff8057f2e3 at panic+0x43
#3 0xffffffff8082eaeb at trash_ctor+0x4b
#4 0xffffffff8082aaec at uma_zalloc_arg+0x52c
#5 0xffffffff813b54a6 at zio_add_child+0x26
#6 0xffffffff813b5a05 at zio_create+0x385
#7 0xffffffff813b6de2 at zio_vdev_child_io+0x232
#8 0xffffffff81396be0 at vdev_mirror_io_start+0x370
#9 0xffffffff813bc629 at zio_vdev_io_start+0x4a9
#10 0xffffffff813b76bc at zio_execute+0x36c
#11 0xffffffff813b6868 at zio_nowait+0xb8
#12 0xffffffff81396bec at vdev_mirror_io_start+0x37c
#13 0xffffffff813bc383 at zio_vdev_io_start+0x203
#14 0xffffffff813b76bc at zio_execute+0x36c
#15 0xffffffff805d10dd at taskqueue_run_locked+0x13d
#16 0xffffffff805d1e78 at taskqueue_thread_loop+0x88
#17 0xffffffff80543844 at fork_exit+0x84
#0 doadump (textdump=<value optimized out>) at pcpu.h:222
#1 0xffffffff8057ece0 in kern_reboot (howto=260) at
/usr/local/share/deploy-tools/RELENG_11/src/sys/kern/kern_shutdown.c:366
#2 0xffffffff8057f2a0 in vpanic (fmt=<value optimized out>, ap=<value
optimized out>)
at /usr/local/share/deploy-tools/RELENG_11/src/sys/kern/kern_shutdown.c:759
#3 0xffffffff8057f2e3 in panic (fmt=<value optimized out>) at
/usr/local/share/deploy-tools/RELENG_11/src/sys/kern/kern_shutdown.c:690
#4 0xffffffff8082eaeb in trash_ctor (mem=<value optimized out>, size=<value
optimized out>, arg=<value optimized out>, flags=<value optimized out>)
at /usr/local/share/deploy-tools/RELENG_11/src/sys/vm/uma_dbg.c:80
#5 0xffffffff8082aaec in uma_zalloc_arg (zone=0xfffff8001febc680,
udata=0xfffff8001ad5f340, flags=<value optimized out>)
at /usr/local/share/deploy-tools/RELENG_11/src/sys/vm/uma_core.c:2152
#6 0xffffffff813b54a6 in zio_add_child (pio=0xfffff8026f350b88,
cio=0xfffff8002478b7b0)
at
/usr/local/share/deploy-tools/RELENG_11/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:460
#7 0xffffffff813b5a05 in zio_create (pio=0xfffff8026f350b88, spa=<value
optimized out>, txg=433989, bp=<value optimized out>, data=0xfffffe0058afa000,
size=1024, type=<value optimized out>, priority=ZIO_PRIORITY_ASYNC_WRITE,
flags=<value optimized out>, vd=<value optimized out>,
offset=<value optimized out>, zb=<value optimized out>, pipeline=<value
optimized out>)
at
/usr/local/share/deploy-tools/RELENG_11/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:690
#8 0xffffffff813b6de2 in zio_vdev_child_io (pio=0xfffff8026f350b88, bp=<value
optimized out>, vd=<value optimized out>, offset=325398016,
data=<value optimized out>, size=1024, type=<value optimized out>,
flags=1048704, done=<value optimized out>)
at
/usr/local/share/deploy-tools/RELENG_11/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:1141
#9 0xffffffff81396be0 in vdev_mirror_io_start (zio=0xfffff8026f350b88)
at
/usr/local/share/deploy-tools/RELENG_11/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_mirror.c:488
#10 0xffffffff813bc629 in zio_vdev_io_start (zio=0xfffff8026f350b88)
at
/usr/local/share/deploy-tools/RELENG_11/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:3143
#11 0xffffffff813b76bc in zio_execute (zio=<value optimized out>)
at
/usr/local/share/deploy-tools/RELENG_11/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:1681
#12 0xffffffff813b6868 in zio_nowait (zio=0xfffff8026f350b88)
at
/usr/local/share/deploy-tools/RELENG_11/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:1739
#13 0xffffffff81396bec in vdev_mirror_io_start (zio=0xfffff8026f7a7b88)
at
/usr/local/share/deploy-tools/RELENG_11/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_mirror.c:488
#14 0xffffffff813bc383 in zio_vdev_io_start (zio=0xfffff8026f7a7b88)
at
/usr/local/share/deploy-tools/RELENG_11/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:3021
#15 0xffffffff813b76bc in zio_execute (zio=<value optimized out>)
at
/usr/local/share/deploy-tools/RELENG_11/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:1681
#16 0xffffffff805d10dd in taskqueue_run_locked (queue=0xfffff8001ab5a700) at
/usr/local/share/deploy-tools/RELENG_11/src/sys/kern/subr_taskqueue.c:454
#17 0xffffffff805d1e78 in taskqueue_thread_loop (arg=<value optimized out>) at
/usr/local/share/deploy-tools/RELENG_11/src/sys/kern/subr_taskqueue.c:741
#18 0xffffffff80543844 in fork_exit (callout=0xffffffff805d1df0
<taskqueue_thread_loop>, arg=0xfffff8001aa90720, frame=0xfffffe043f609ac0)
at /usr/local/share/deploy-tools/RELENG_11/src/sys/kern/kern_fork.c:1042
#19 0xffffffff808598ae in fork_trampoline () at
/usr/local/share/deploy-tools/RELENG_11/src/sys/amd64/amd64/exception.S:611
#20 0x0000000000000000 in ?? ()
I consider this as a severe problem, which shouldn't exist in 11.1-RELEASE.
If nobody can prove my findings wrong, using passthru should be disabled in
RELENG_11_1 until it can be ruled out as source of these strange problems (some
form of memory corruption).
Thanks,
-harry
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