CVE-2022-49542

Summary

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().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0b3ad32e26460affc9d4b2f9c32d7c228e8b0cfb < 271725e4028559ae7974d762a8467dc9de412f2eaffected
LinuxLinux0b3ad32e26460affc9d4b2f9c32d7c228e8b0cfb < cc6501afccec55b8b6c90584cbf71f1fefa77d1eaffected
LinuxLinux0b3ad32e26460affc9d4b2f9c32d7c228e8b0cfb < 09c772557a4fd9490fed1bfb133268313ea22213affected
LinuxLinux0b3ad32e26460affc9d4b2f9c32d7c228e8b0cfb < e294647b1aed4247fe52851f3a3b2b19ae906228affected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux5.15.46 <= 5.15.*unaffected
LinuxLinux5.17.14 <= 5.17.*unaffected
LinuxLinux5.18.3 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References