Bug 2348079 (CVE-2022-49537) - CVE-2022-49537 kernel: scsi: lpfc: Fix call trace observed during I/O with CMF enabled
Summary: CVE-2022-49537 kernel: scsi: lpfc: Fix call trace observed during I/O with CM...
Keywords:
Status: NEW
Alias: CVE-2022-49537
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-02-26 03:16 UTC by OSIDB Bzimport
Modified: 2025-05-21 15:43 UTC (History)
4 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2025-02-26 03:16:53 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: lpfc: Fix call trace observed during I/O with CMF enabled

The following was seen with CMF enabled:

BUG: using smp_processor_id() in preemptible
code: systemd-udevd/31711
kernel: caller is lpfc_update_cmf_cmd+0x214/0x420  [lpfc]
kernel: CPU: 12 PID: 31711 Comm: systemd-udevd
kernel: Call Trace:
kernel: <TASK>
kernel: dump_stack_lvl+0x44/0x57
kernel: check_preemption_disabled+0xbf/0xe0
kernel: lpfc_update_cmf_cmd+0x214/0x420 [lpfc]
kernel: lpfc_nvme_fcp_io_submit+0x23b4/0x4df0 [lpfc]

this_cpu_ptr() calls smp_processor_id() in a preemptible context.

Fix by using per_cpu_ptr() with raw_smp_processor_id() instead.
Comment 1 Avinash Hanwate 2025-02-26 21:53:46 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022613-CVE-2022-49537-abf2@gregkh/T
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