From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-cve-announce@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: CVE-2022-49536: scsi: lpfc: Fix SCSI I/O completion and abort handler deadlock
Date: Wed, 26 Feb 2025 03:13:30 +0100 [thread overview]
Message-ID: <2025022613-CVE-2022-49536-db89@gregkh> (raw)
Description
===========
In the Linux kernel, the following vulnerability has been resolved:
scsi: lpfc: Fix SCSI I/O completion and abort handler deadlock
During stress I/O tests with 500+ vports, hard LOCKUP call traces are
observed.
CPU A:
native_queued_spin_lock_slowpath+0x192
_raw_spin_lock_irqsave+0x32
lpfc_handle_fcp_err+0x4c6
lpfc_fcp_io_cmd_wqe_cmpl+0x964
lpfc_sli4_fp_handle_cqe+0x266
__lpfc_sli4_process_cq+0x105
__lpfc_sli4_hba_process_cq+0x3c
lpfc_cq_poll_hdler+0x16
irq_poll_softirq+0x76
__softirqentry_text_start+0xe4
irq_exit+0xf7
do_IRQ+0x7f
CPU B:
native_queued_spin_lock_slowpath+0x5b
_raw_spin_lock+0x1c
lpfc_abort_handler+0x13e
scmd_eh_abort_handler+0x85
process_one_work+0x1a7
worker_thread+0x30
kthread+0x112
ret_from_fork+0x1f
Diagram of lockup:
CPUA CPUB
---- ----
lpfc_cmd->buf_lock
phba->hbalock
lpfc_cmd->buf_lock
phba->hbalock
Fix by reordering the taking of the lpfc_cmd->buf_lock and phba->hbalock in
lpfc_abort_handler routine so that it tries to take the lpfc_cmd->buf_lock
first before phba->hbalock.
The Linux kernel CVE team has assigned CVE-2022-49536 to this issue.
Affected and fixed versions
===========================
Fixed in 5.15.46 with commit 7625e81de2164a082810e1f27547d388406da610
Fixed in 5.17.14 with commit 21c0d469349957b5dc811c41200a2a998996ca8d
Fixed in 5.18.3 with commit 0c4eed901285b9cae36a622f32bea3e92490da6c
Fixed in 5.19 with commit 03cbbd7c2f5ee288f648f4aeedc765a181188553
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-2022-49536
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/7625e81de2164a082810e1f27547d388406da610
https://git.kernel.org/stable/c/21c0d469349957b5dc811c41200a2a998996ca8d
https://git.kernel.org/stable/c/0c4eed901285b9cae36a622f32bea3e92490da6c
https://git.kernel.org/stable/c/03cbbd7c2f5ee288f648f4aeedc765a181188553
reply other threads:[~2025-02-26 2:15 UTC|newest]
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