[Bug 282399] graphics/drm-kmod: kldunload drm_managed and debugfsint amdgpu leak memory

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=282399

            Bug ID: 282399
           Summary: graphics/drm-kmod: kldunload drm_managed and
                    debugfsint amdgpu leak memory
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: x11@FreeBSD.org
          Reporter: vedran@miletic.net
          Assignee: x11@FreeBSD.org
             Flags: maintainer-feedback?(x11@FreeBSD.org)

# uname -aKU
FreeBSD afrodite 14.1-RELEASE-p5 FreeBSD 14.1-RELEASE-p5 GENERIC amd64 1401000
1401000

# pciconf -lv
(...)
vgapci0@pci0:0:1:0:     class=0x030000 rev=0xc6 hdr=0x00 vendor=0x1002
device=0x9874 subvendor=0x103c subdevice=0x805b
    vendor     = 'Advanced Micro Devices, Inc. [AMD/ATI]'
    device     = 'Wani [Radeon R5/R6/R7 Graphics]'
    class      = display
    subclass   = VGA
(...)

# kldunload amdgpu
# dmesg
(...)
iic3: detached
iicbus3: detached
lkpi_iic3: detached
iic4: detached
iicbus4: detached
lkpi_iic4: detached
iic5: detached
iicbus5: detached
lkpi_iic5: detached
Warning: can't remove non-dynamic nodes (dri)!
drmn0: amdgpu: finishing device.
drmn0: detached
Freed UMA keg (drm_buddy_block) was not empty (83 items).  Lost 3 pages of
memory.
Freed UMA keg (drm_sched_fence) was not empty (1 items).  Lost 1 pages of
memory.
Warning: memory type drm_managed leaked memory on destroy (13 allocations, 832
bytes leaked).
iic0: detached
iicbus0: <unknown card> at addr 0
iic1: detached
iicbus1: <unknown card> at addr 0
iic2: detached
iicbus2: <unknown card> at addr 0
Warning: memory type debugfsint leaked memory on destroy (2 allocations, 80
bytes leaked).

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