CVE-2022-49537

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> scsi: lpfc: Fix call trace observed during I/O with CMF enabled<br /> <br /> The following was seen with CMF enabled:<br /> <br /> BUG: using smp_processor_id() in preemptible<br /> code: systemd-udevd/31711<br /> kernel: caller is lpfc_update_cmf_cmd+0x214/0x420 [lpfc]<br /> kernel: CPU: 12 PID: 31711 Comm: systemd-udevd<br /> kernel: Call Trace:<br /> kernel: <br /> kernel: dump_stack_lvl+0x44/0x57<br /> kernel: check_preemption_disabled+0xbf/0xe0<br /> kernel: lpfc_update_cmf_cmd+0x214/0x420 [lpfc]<br /> kernel: lpfc_nvme_fcp_io_submit+0x23b4/0x4df0 [lpfc]<br /> <br /> this_cpu_ptr() calls smp_processor_id() in a preemptible context.<br /> <br /> Fix by using per_cpu_ptr() with raw_smp_processor_id() instead.