From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-cve-announce@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: CVE-2022-49537: scsi: lpfc: Fix call trace observed during I/O with CMF enabled
Date: Wed, 26 Feb 2025 03:13:31 +0100 [thread overview]
Message-ID: <2025022613-CVE-2022-49537-abf2@gregkh> (raw)
Description
===========
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.
The Linux kernel CVE team has assigned CVE-2022-49537 to this issue.
Affected and fixed versions
===========================
Fixed in 5.15.46 with commit ae373d66c427812754db5292eb1481b181daf9ce
Fixed in 5.17.14 with commit cd7f899de4b1b829125d72ee6fbfd878b637b815
Fixed in 5.18.3 with commit 517e0835cfb2007713ff16c4fb8479f08b16aec7
Fixed in 5.19 with commit d6d45f67a11136cb88a70a29ab22ea6db8ae6bd5
Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.
Unaffected versions might change over time as fixes are backported to
older supported kernel versions. The official CVE entry at
https://cve.org/CVERecord/?id=CVE-2022-49537
will be updated if fixes are backported, please check that for the most
up to date information about this issue.
Affected files
==============
The file(s) affected by this issue are:
drivers/scsi/lpfc/lpfc_scsi.c
Mitigation
==========
The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes. Individual
changes are never tested alone, but rather are part of a larger kernel
release. Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all. If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
https://git.kernel.org/stable/c/ae373d66c427812754db5292eb1481b181daf9ce
https://git.kernel.org/stable/c/cd7f899de4b1b829125d72ee6fbfd878b637b815
https://git.kernel.org/stable/c/517e0835cfb2007713ff16c4fb8479f08b16aec7
https://git.kernel.org/stable/c/d6d45f67a11136cb88a70a29ab22ea6db8ae6bd5
reply other threads:[~2025-02-26 2:15 UTC|newest]
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