In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Fix memory leak in dm_sw_fini()

After destroying dmub_srv, the memory associated with it is
not freed, causing a memory leak:

unreferenced object 0xffff896302b45800 (size 1024):
comm "(udev-worker)", pid 222, jiffies 4294894636
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 6265fd77):
[] kmalloc_trace+0x29d/0x340
[] dm_dmub_sw_init+0xb4/0x450 [amdgpu]
[] dm_sw_init+0x15/0x2b0 [amdgpu]
[] amdgpu_device_init+0x1417/0x24e0 [amdgpu]
[] amdgpu_driver_load_kms+0x15/0x190 [amdgpu]
[] amdgpu_pci_probe+0x187/0x4e0 [amdgpu]
[] local_pci_probe+0x3e/0x90
[] pci_device_probe+0xc3/0x230
[] really_probe+0xe2/0x480
[] __driver_probe_device+0x78/0x160
[] driver_probe_device+0x1f/0x90
[] __driver_attach+0xce/0x1c0
[] bus_for_each_dev+0x70/0xc0
[] bus_add_driver+0x112/0x210
[] driver_register+0x55/0x100
[] do_one_initcall+0x41/0x300

Fix this by freeing dmub_srv after destroying it.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-26833
• https://git.kernel.org/stable/c/10c6b90e975358c17856a578419dc449887899c2
• https://git.kernel.org/stable/c/33f649f1b1cea39ed360e6c12bba4fac83118e6e
• https://git.kernel.org/stable/c/541e79265ea7e339a7c4a462feafe9f8f996e04b
• https://git.kernel.org/stable/c/58168005337eabef345a872be3f87d0215ff3b30
• https://git.kernel.org/stable/c/b49b022f7dfce85eb77d0d987008fde5c01d7857
• https://git.kernel.org/stable/c/bae67893578d608e35691dcdfa90c4957debf1d3
• https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html