On Tue, Aug 26, 2025 at 02:00:56PM +0530, Venkat Rao Bagalkote wrote: > Greetings!!! > > > IBM CI has reported a kernel OOPs, while running blktest suite(nvme/058 > test). > > > Kernel Repo: > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > > Traces: > > > [37496.800225] BUG: Kernel NULL pointer dereference at 0x00000000 > [37496.800230] Faulting instruction address: 0xc0000000008a34b0 > [37496.800235] Oops: Kernel access of bad area, sig: 11 [#1] ... > [37496.800365] GPR28: 0000000000000001 0000000000000001 c0000000b005c400 > 0000000000000000 > [37496.800424] NIP [c0000000008a34b0] __rq_qos_done_bio+0x3c/0x88 It looks regression from 370ac285f23a ("block: avoid cpu_hotplug_lock depedency on freeze_lock"), For nvme mpath, same bio crosses two drivers, so QUEUE_FLAG_QOS_ENABLED & q->rq_qos check can't be skipped. Thanks, Ming
