| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: 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(). |
| |
| The Linux kernel CVE team has assigned CVE-2022-49542 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.15.46 with commit 271725e4028559ae7974d762a8467dc9de412f2e |
| Fixed in 5.17.14 with commit cc6501afccec55b8b6c90584cbf71f1fefa77d1e |
| Fixed in 5.18.3 with commit 09c772557a4fd9490fed1bfb133268313ea22213 |
| Fixed in 5.19 with commit e294647b1aed4247fe52851f3a3b2b19ae906228 |
| |
| 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-2022-49542 |
| 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_init.c |
| drivers/scsi/lpfc/lpfc_logmsg.h |
| |
| |
| 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/271725e4028559ae7974d762a8467dc9de412f2e |
| https://git.kernel.org/stable/c/cc6501afccec55b8b6c90584cbf71f1fefa77d1e |
| https://git.kernel.org/stable/c/09c772557a4fd9490fed1bfb133268313ea22213 |
| https://git.kernel.org/stable/c/e294647b1aed4247fe52851f3a3b2b19ae906228 |
