panic: unlocking unlocked wait/wound mutex

[r0ller <r0ller%freemail.hu@localhost>]

Hi All,

Does anyone know a remedy to this? The relevant part of the dmesg is as 
follows:

[ 10,368692] wsdisplay0: screen 1 added (default, vt100 emulation)
[ 10,368692] wsdisplay0: screen 2 added (default, vt100 emulation)
[ 10,368692] wsdisplay0: screen 3 added (default, vt100 emulation)
[ 10,368692] wsdisplay0: screen 4 added (default, vt100 emulation)
[ 46,942227] panic: unlocking unlocked wait/wound mutex: 0xffff858023c90920
[ 46,942227] cpu0: Begin traceback...
[ 46,942227] vpanic() at netbsd:vpanic+0x183
[ 46,942227] panic() at netbsd:panic+0x3c
[ 46,942227] linux_ww_mutex_unlock() at netbsd:linux_ww_mutex_unlock+0x9e
[ 46,942227] ttm_bo_release() at netbsd:ttm_bo_release+0xf3
[ 46,942227] amdgpu_bo_unref() at netbsd:amdgpu_bo_unref+0x1d
[ 46,942227] amdgpu_vm_free_table() at netbsd:amdgpu_vm_free_table+0x53
[ 46,942227] amdgpu_vm_free_pts() at netbsd:amdgpu_vm_free_pts+0xeb
[ 46,942227] amdgpu_vm_fini() at netbsd:amdgpu_vm_fini+0x270
[ 46,942227] amdgpu_driver_postclose_kms() at 
netbsd:amdgpu_driver_postclose_kms+0x101
[ 46,942227] drm_file_free() at netbsd:drm_file_free+0x1fb
[ 46,942227] drm_close() at netbsd:drm_close+0x60
[ 46,942227] closef() at netbsd:closef+0x58
[ 46,942227] fd_close() at netbsd:fd_close+0x140
[ 46,942227] sys_close() at netbsd:sys_close+0x22
[ 46,942227] syscall() at netbsd:syscall+0x1fc
[ 46,942227] --- syscall (number 6) ---
[ 46,942227] netbsd:syscall+0x1fc:
[ 46,942227] cpu0: End traceback...

Thanks for any hint!

Best regards,
r0ller