[Bug 264833] 12.3-STABLE panic on sync and reboot: panic: sleeping thread: propagate_priority() > turnstile_wait() > __mtx_lock_sleep() > softclock_call_cc()

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264833

Mark Johnston <markj@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |markj@FreeBSD.org,
                   |                            |vbox@FreeBSD.org

--- Comment #4 from Mark Johnston <markj@FreeBSD.org> ---
Probably one of these two threads.  Looks like a virtualbox bug then:

Tracing command Timer pid 135 tid 100519 td 0xfffff80006e1e740
sched_switch() at 0xffffffff80ce26e6 = sched_switch+0x606/frame
0xfffffe0013edaa70
mi_switch() at 0xffffffff80cbebdb = mi_switch+0xdb/frame 0xfffffe0013edaaa0
sleepq_timedwait() at 0xffffffff80d0e92f = sleepq_timedwait+0x2f/frame
0xfffffe0013edaae0
rtR0SemEventWait() at 0xffffffff82d3d0eb = rtR0SemEventWait+0x2ab/frame
0xfffffe0013edab50
rtTimerThread() at 0xffffffff82d37c05 = rtTimerThread+0xc5/frame
0xfffffe0013edab80
rtThreadMain() at 0xffffffff82d280dc = rtThreadMain+0x2c/frame
0xfffffe0013edaba0
rtThreadNativeMain() at 0xffffffff82d3e536 = rtThreadNativeMain+0x16/frame
0xfffffe0013edabb0
fork_exit() at 0xffffffff80c71e5e = fork_exit+0x7e/frame 0xfffffe0013edabf0
fork_trampoline() at 0xffffffff812dc80e = fork_trampoline+0xe/frame
0xfffffe0013edabf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---

Tracing command kldload pid 134 tid 100529 td 0xfffff800063ce000
sched_switch() at 0xffffffff80ce26e6 = sched_switch+0x606/frame
0xfffffe0013f0c2a0
mi_switch() at 0xffffffff80cbebdb = mi_switch+0xdb/frame 0xfffffe0013f0c2d0
sleepq_wait() at 0xffffffff80d0e05c = sleepq_wait+0x2c/frame 0xfffffe0013f0c300
rtR0SemEventMultiBsdWait() at 0xffffffff82d3d6ed =
rtR0SemEventMultiBsdWait+0x1ed/frame 0xfffffe0013f0c360
vgdrvHgcmAsyncWaitCallbackWorker() at 0xffffffff82d1e2fa =
vgdrvHgcmAsyncWaitCallbackWorker+0x14a/frame 0xfffffe0013f0c3a0
VbglR0HGCMInternalConnect() at 0xffffffff82d1f42b =
VbglR0HGCMInternalConnect+0x11b/frame 0xfffffe0013f0c3f0
VGDrvCommonIoCtl() at 0xffffffff82d1bc9d = VGDrvCommonIoCtl+0xb5d/frame
0xfffffe0013f0c470
VGDrvCommonProcessOptionsFromHost() at 0xffffffff82d1aa56 =
VGDrvCommonProcessOptionsFromHost+0x146/frame 0xfffffe0013f0c570
vgdrvFreeBSDAttach() at 0xffffffff82d1e988 = vgdrvFreeBSDAttach+0x1d8/frame
0xfffffe0013f0c5b0
device_attach() at 0xffffffff80cec593 = device_attach+0x3c3/frame
0xfffffe0013f0c600
device_probe_and_attach() at 0xffffffff80cec1b1 =
device_probe_and_attach+0x41/frame 0xfffffe0013f0c630
pci_driver_added() at 0xffffffff8087acd3 = pci_driver_added+0xf3/frame
0xfffffe0013f0c670
devclass_driver_added() at 0xffffffff80cea009 =
devclass_driver_added+0x39/frame 0xfffffe0013f0c6b0
devclass_add_driver() at 0xffffffff80ce9f8d = devclass_add_driver+0x13d/frame
0xfffffe0013f0c6f0
module_register_init() at 0xffffffff80c90e24 = module_register_init+0xa4/frame
0xfffffe0013f0c720
linker_load_module() at 0xffffffff80c8371f = linker_load_module+0xa7f/frame
0xfffffe0013f0ca40
kern_kldload() at 0xffffffff80c84fbd = kern_kldload+0xbd/frame
0xfffffe0013f0ca90
sys_kldload() at 0xffffffff80c850fb = sys_kldload+0x5b/frame 0xfffffe0013f0cac0
amd64_syscall() at 0xffffffff813042d7 = amd64_syscall+0x387/frame
0xfffffe0013f0cbf0
fast_syscall_common() at 0xffffffff812dc0fe = fast_syscall_common+0xf8/frame
0xfffffe0013f0cbf0
--- syscall (304, FreeBSD ELF64, sys_kldload), rip = 0x8002deb2a, rsp =
0x7fffffffd748, rbp = 0x7fffffffdcc0 ---

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