| 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-2022-48791: scsi: pm8001: Fix use-after-free for aborted TMF sas_task |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| scsi: pm8001: Fix use-after-free for aborted TMF sas_task |
| |
| Currently a use-after-free may occur if a TMF sas_task is aborted before we |
| handle the IO completion in mpi_ssp_completion(). The abort occurs due to |
| timeout. |
| |
| When the timeout occurs, the SAS_TASK_STATE_ABORTED flag is set and the |
| sas_task is freed in pm8001_exec_internal_tmf_task(). |
| |
| However, if the I/O completion occurs later, the I/O completion still |
| thinks that the sas_task is available. Fix this by clearing the ccb->task |
| if the TMF times out - the I/O completion handler does nothing if this |
| pointer is cleared. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48791 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.10.102 with commit d872e7b5fe38f325f5206b6872746fa02c2b4819 |
| Fixed in 5.15.25 with commit 3c334cdfd94945b8edb94022a0371a8665b17366 |
| Fixed in 5.16.11 with commit 510b21442c3a2e3ecc071ba3e666b320e7acdd61 |
| Fixed in 5.17 with commit 61f162aa4381845acbdc7f2be4dfb694d027c018 |
| |
| 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-2022-48791 |
| 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/pm8001_sas.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/d872e7b5fe38f325f5206b6872746fa02c2b4819 |
| https://git.kernel.org/stable/c/3c334cdfd94945b8edb94022a0371a8665b17366 |
| https://git.kernel.org/stable/c/510b21442c3a2e3ecc071ba3e666b320e7acdd61 |
| https://git.kernel.org/stable/c/61f162aa4381845acbdc7f2be4dfb694d027c018 |
