On 2025-08-11 00:05:49 [+0900], Yunseong Kim wrote: > While running a PREEMPT_RT-enabled kernel I observed a sleepable > spinlock (rt_spin_lock) being taken from a softirq context within > the USB core framework. On PREEMPT_RT, spin_lock() may sleep when > contended. This is unsafe in softirq context and can cause hangs or > deadlocks. > … > I believe this requires a change in the USB core framework rather than > just in individual drivers. > > Kernel config, full logs, and reproduction steps can be provided on > request. > > This bug was uncovered during my work to fixing KCOV for PREEMPT_RT awareness. > Link: https://lore.kernel.org/all/ee26e7b2-80dd-49b1-bca2-61e460f73c2d@xxxxxxxxxxx/t/#u I'm confused. Is this new or this the same bug that was reported by you in the thread you linked? The kcov issue should be fixed by https://lore.kernel.org/all/20250811082745.ycJqBXMs@xxxxxxxxxxxxx/ > Best Regards, > Yunseong Kim Sebastian
