[Bug 259555] Fatal trap 12: page fault in vboxNetFltPortXmit

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259555

--- Comment #4 from Martin Filla <freebsd@sysctl.cz> ---
second panic 

WARNING !drm_modeset_is_locked(&plane->mutex) failed at
/wrkdirs/usr/ports/graphics/drm-fbsd12.0-kmod/work/kms-drm-8843e1fc5/drivers/gpu/drm/drm_atomic_helper.c:821
#0 0xffffffff82cdd483 at linux_dump_stack+0x23
#1 0xffffffff82c68917 at drm_atomic_helper_check_planes+0xa7
#2 0xffffffff82bb1eec at intel_atomic_check+0xd3c
#3 0xffffffff82c656bb at drm_atomic_check_only+0x2ab
#4 0xffffffff82c65a63 at drm_atomic_commit+0x13
#5 0xffffffff82c91a38 at restore_fbdev_mode_atomic+0x1c8
#6 0xffffffff82c8dd5a at drm_fb_helper_restore_fbdev_mode_unlocked+0x7a
#7 0xffffffff82cb3717 at vt_kms_postswitch+0x127
#8 0xffffffff80a2af9a at vt_window_switch+0x13a
#9 0xffffffff80a2800f at vtterm_cngrab+0x1f
#10 0xffffffff80b5eb36 at cngrab+0x16
#11 0xffffffff80bbf055 at vpanic+0xe5
#12 0xffffffff80bbef63 at panic+0x43
#13 0xffffffff8108f941 at trap_fatal+0x391
#14 0xffffffff8108edc7 at trap+0x67
#15 0xffffffff81066d48 at calltrap+0x8
#16 0xffffffff82e8ae9e at marker_response_tlv_template+0xdd42
#17 0xffffffff82eac602 at marker_response_tlv_template+0x2f4a6
<4>WARN_ON(!mutex_is_locked(&dev->struct_mutex))

<4>WARN_ON(!mutex_is_locked(&fbc->lock))WARN_ON(!mutex_is_locked(&fbc->lock))WARN_ON(!mutex_is_locked(&fbc->lock))
panic: privileged instruction fault
cpuid = 0
time = 1636986533
KDB: stack backtrace:
#0 0xffffffff80c0ae35 at kdb_backtrace+0x65
#1 0xffffffff80bbf0eb at vpanic+0x17b
#2 0xffffffff80bbef63 at panic+0x43
#3 0xffffffff8108f941 at trap_fatal+0x391
#4 0xffffffff8108edc7 at trap+0x67
#5 0xffffffff81066d48 at calltrap+0x8
#6 0xffffffff82e8ae9e at marker_response_tlv_template+0xdd42
#7 0xffffffff82eac602 at marker_response_tlv_template+0x2f4a6
#8 0xffffffff8247bf1e at supdrvIOCtlFast+0x5e
#9 0xffffffff8248c8ea at VBoxDrvFreeBSDIOCtl+0x4a
#10 0xffffffff80a793c0 at devfs_ioctl+0xb0
#11 0xffffffff8124725b at VOP_IOCTL_APV+0x7b
#12 0xffffffff80c9cffa at vn_ioctl+0x16a
#13 0xffffffff80a799ae at devfs_ioctl_f+0x1e
#14 0xffffffff80c28be7 at kern_ioctl+0x2b7
#15 0xffffffff80c2888a at sys_ioctl+0xfa
#16 0xffffffff810904f7 at amd64_syscall+0x387
#17 0xffffffff8106766e at fast_syscall_common+0xf8
Uptime: 6h52m19s
Dumping 872 out of 7838 MB:..2%..12%..21%..32%..41%..52%..61%..72%..81%..92%

__curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55
55              __asm("movq %%gs:%P1,%0" : "=r" (td) : "n" (offsetof(struct
pcpu,
(kgdb) #0  __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55
#1  doadump (textdump=<optimized out>)
    at /usr/src/sys/kern/kern_shutdown.c:371
#2  0xffffffff80bbed05 in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:451
#3  0xffffffff80bbf143 in vpanic (fmt=<optimized out>, ap=<optimized out>)
    at /usr/src/sys/kern/kern_shutdown.c:880
#4  0xffffffff80bbef63 in panic (fmt=<unavailable>)
    at /usr/src/sys/kern/kern_shutdown.c:807
#5  0xffffffff8108f941 in trap_fatal (frame=0xfffffe006370c5b0, eva=0)
    at /usr/src/sys/amd64/amd64/trap.c:921
#6  0xffffffff8108edc7 in trap (frame=0xfffffe006370c5b0)
    at /usr/src/sys/amd64/amd64/trap.c:214
#7  <signal handler called>
#8  0xffffffff82e8e3ee in ?? ()
#9  0x0000000189e56000 in ?? ()
#10 0xffff0ffffffffffc in ?? ()
#11 0x0000000000000000 in ?? ()
(kgdb)

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