Hi On 17.11.2024 17.32, Sundtek wrote:
This patch fixes a NULL Pointer exception when a device using the XHCI controller driver is not properly initialized. It's relatively easy to reproduce with a faulty connection to a USB Harddisk / USB Ethernet adapter. The way I used for testing this patch was to short USB D+/D- and pull them to ground. We manufacture our own USB devices and use Linux for testing, lately we upgraded the system to Ubuntu noble with Kernel 6.8.0 and our system also crashed multiple times just when plugging in some devices (no commands need to be executed). We connect/disconnect devices > 100 times (eg uploading firmware, do electrical tests etc). I would rate this issue as highly critical. The problem is triggered via some fallback code in hub.c, a second patch will follow which removes the endpoint reset in the particular fallback.
2024-11-16T22:14:12.122224+08:00 sundtek-UX32VD kernel: RIP: 0010:xhci_check_bw_table+0x100/0x4d0
This looks very similar to a null pointer issue I fixed recently. Patch should be in 6.11 and recent stable releases: af8e119f52e9 xhci: Fix Panther point NULL pointer deref at full-speed re-enumeration What kernel are you running? Thanks Mathias
