CVE-2025-40108

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

serial: qcom-geni: Fix blocked task

Revert commit 1afa70632c39 ("serial: qcom-geni: Enable PM runtime for serial driver") and its dependent commit 86fa39dd6fb7 ("serial: qcom-geni: Enable Serial on SA8255p Qualcomm platforms") because the first one causes regression - hang task on Qualcomm RB1 board (QRB2210) and unable to use serial at all during normal boot:

INFO: task kworker/u16:0:12 blocked for more than 42 seconds. Not tainted 6.17.0-rc1-00004-g53e760d89498 #9 "echo 0 > /proc/sys/kernel/hungtasktimeoutsecs" disables this message. task:kworker/u16:0 state:D stack:0 pid:12 tgid:12 ppid:2 taskflags:0x4208060 flags:0x00000010 Workqueue: async asyncrunentryfn Call trace: _switchto+0xe8/0x1a0 (T) _schedule+0x290/0x7c0 schedule+0x34/0x118 rpmresume+0x14c/0x66c rpmresume+0x2a4/0x66c rpmresume+0x2a4/0x66c rpmresume+0x2a4/0x66c _pmruntimeresume+0x50/0x9c _driverprobedevice+0x58/0x120 driverprobedevice+0x3c/0x154 _driverattachasynchelper+0x4c/0xc0 asyncrunentryfn+0x34/0xe0 processonework+0x148/0x290 workerthread+0x2c4/0x3e0 kthread+0x118/0x1c0 retfromfork+0x10/0x20

The issue was reported on 12th of August and was ignored by author of commits introducing issue for two weeks. Only after complaining author produced a fix which did not work, so if original commits cannot be reliably fixed for 5 weeks, they obviously are buggy and need to be dropped.