CVE-2022-49542

scsi: lpfc: Move cfg_log_verbose check before calling lpfc_dmp_dbg()

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Move cfg_log_verbose check before calling lpfc_dmp_dbg() In an attempt to log message 0126 with LOG_TRACE_EVENT, the following hard lockup call trace hangs the system. Call Trace: _raw_spin_lock_irqsave+0x32/0x40 lpfc_dmp_dbg.part.32+0x28/0x220 [lpfc] lpfc_cmpl_els_fdisc+0x145/0x460 [lpfc] lpfc_sli_cancel_jobs+0x92/0xd0 [lpfc] lpfc_els_flush_cmd+0x43c/0x670 [lpfc] lpfc_els_flush_all_cmd+0x37/0x60 [lpfc] lpfc_sli4_async_event_proc+0x956/0x1720 [lpfc] lpfc_do_work+0x1485/0x1d70 [lpfc] kthread+0x112/0x130 ret_from_fork+0x1f/0x40 Kernel panic - not syncing: Hard LOCKUP The same CPU tries to claim the phba->port_list_lock twice. Move the cfg_log_verbose checks as part of the lpfc_printf_vlog() and lpfc_printf_log() macros before calling lpfc_dmp_dbg(). There is no need to take the phba->port_list_lock within lpfc_dmp_dbg().

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/271725e4028559ae7974d762a8467dc9de412f2e patch
https://git.kernel.org/stable/c/cc6501afccec55b8b6c90584cbf71f1fefa77d1e patch
https://git.kernel.org/stable/c/09c772557a4fd9490fed1bfb133268313ea22213 patch
https://git.kernel.org/stable/c/e294647b1aed4247fe52851f3a3b2b19ae906228 patch

Frequently Asked Questions

What is the severity of CVE-2022-49542?
CVE-2022-49542 has been scored as a medium severity vulnerability.
How to fix CVE-2022-49542?
To fix CVE-2022-49542, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49542 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-49542 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49542?
CVE-2022-49542 affects Linux Linux, Linux Linux.
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