In the Linux kernel, the following vulnerability has been resolved:
scsi: smartpqi: Fix smpprocessorid() call trace for preemptible kernels
Correct kernel call trace when calling smpprocessorid() when called in preemptible kernels by using rawsmpprocessor_id().
smpprocessorid() checks to see if preemption is disabled and if not, issue an error message followed by a call to dump_stack().
Brief example of call trace: kernel: checkpreemptiondisabled: 436 callbacks suppressed kernel: BUG: using smpprocessorid() in preemptible [00000000] code: kworker/u1025:0/2354 kernel: caller is pqiscsiqueuecommand+0x183/0x310 [smartpqi] kernel: CPU: 129 PID: 2354 Comm: kworker/u1025:0 kernel: ... kernel: Workqueue: writeback wbworkfn (flush-253:0) kernel: Call Trace: kernel: <TASK> kernel: dumpstacklvl+0x34/0x48 kernel: checkpreemptiondisabled+0xdd/0xe0 kernel: pqiscsiqueue_command+0x183/0x310 [smartpqi] kernel: ...