| 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-2022-48792: scsi: pm8001: Fix use-after-free for aborted SSP/STP sas_task |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| scsi: pm8001: Fix use-after-free for aborted SSP/STP sas_task |
| |
| Currently a use-after-free may occur if a sas_task is aborted by the upper |
| layer before we handle the I/O completion in mpi_ssp_completion() or |
| mpi_sata_completion(). |
| |
| In this case, the following are the two steps in handling those I/O |
| completions: |
| |
| - Call complete() to inform the upper layer handler of completion of |
| the I/O. |
| |
| - Release driver resources associated with the sas_task in |
| pm8001_ccb_task_free() call. |
| |
| When complete() is called, the upper layer may free the sas_task. As such, |
| we should not touch the associated sas_task afterwards, but we do so in the |
| pm8001_ccb_task_free() call. |
| |
| Fix by swapping the complete() and pm8001_ccb_task_free() calls ordering. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48792 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.10.102 with commit fe9ac3eaa2e387a5742b380b73a5a6bc237bf184 |
| Fixed in 5.15.25 with commit d9d93f32534a0a80a1c26bdb0746d90a7b19c2c2 |
| Fixed in 5.16.11 with commit f61f9fccb2cb4bb275674a79d638704db6bc2171 |
| Fixed in 5.17 with commit df7abcaa1246e2537ab4016077b5443bb3c09378 |
| |
| 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-2022-48792 |
| 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/pm8001/pm80xx_hwi.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/fe9ac3eaa2e387a5742b380b73a5a6bc237bf184 |
| https://git.kernel.org/stable/c/d9d93f32534a0a80a1c26bdb0746d90a7b19c2c2 |
| https://git.kernel.org/stable/c/f61f9fccb2cb4bb275674a79d638704db6bc2171 |
| https://git.kernel.org/stable/c/df7abcaa1246e2537ab4016077b5443bb3c09378 |
