I would have thought that this patch upstream would have been suitable for stable series.
It seems like the bug that the patch fixes is not annotated correctly, hence it was not picked for stable updates yet. I wonder if we should try to submit to linux-stable for v5.4 v5.8 series. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1935846 Title: Sony Dualshock 4 usb dongle crashes the whole system Status in linux package in Ubuntu: New Bug description: The hid-sony driver has custom DS4 connect/disconnect logic for the DS4 dongle, which is a USB dongle acting as a proxy to Bluetooth connected DS4. The connect/disconnect logic works fine generally, however not in conjunction with Steam. Steam implements its own DS4 driver using hidraw. Both hid-sony and Steam are issuing their own HID requests and are racing each other during DS4 dongle connect/disconnect resulting in a kernel crash in hid-sony. The problem is that upon a DS4 connect to the dongle, hid-sony kicks of 'ds4_get_calibration_data' from within its dongle hotplug code. The calibration code issues raw HID feature report for reportID 0x02. When Steam is running, it issues a feature report for reportID 0x12 typically just prior to hid-sony requesting feature reportID 0x02. The result is that 'ds4_get_calibration_data' receives the data Steam requested as that's the HID report returing first. Currently this results in it processing invalid data, which ultimately results in a divide by zero upon a future 'dualshock4_parse_report'. The solution for now is to check within 'ds4_get_calibration_data' to check if we received data for the feature report we issued and if not retry. Please consider to add this patch to Ubuntu LTS kernels. Commit: https://github.com/torvalds/linux/commit/f5dc93b7875bcb8be77baa792cc9432aaf65365b To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1935846/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
