| 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-2021-47188: scsi: ufs: core: Improve SCSI abort handling |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| scsi: ufs: core: Improve SCSI abort handling |
| |
| The following has been observed on a test setup: |
| |
| WARNING: CPU: 4 PID: 250 at drivers/scsi/ufs/ufshcd.c:2737 ufshcd_queuecommand+0x468/0x65c |
| Call trace: |
| ufshcd_queuecommand+0x468/0x65c |
| scsi_send_eh_cmnd+0x224/0x6a0 |
| scsi_eh_test_devices+0x248/0x418 |
| scsi_eh_ready_devs+0xc34/0xe58 |
| scsi_error_handler+0x204/0x80c |
| kthread+0x150/0x1b4 |
| ret_from_fork+0x10/0x30 |
| |
| That warning is triggered by the following statement: |
| |
| WARN_ON(lrbp->cmd); |
| |
| Fix this warning by clearing lrbp->cmd from the abort handler. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47188 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.4 with commit 7a3e97b0dc4bbac2ba7803564ab0057722689921 and fixed in 5.15.5 with commit c36baca06efa833adaefba61f45fefdc49b6d070 |
| Issue introduced in 3.4 with commit 7a3e97b0dc4bbac2ba7803564ab0057722689921 and fixed in 5.16 with commit 3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566 |
| |
| 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-2021-47188 |
| 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/ufs/ufshcd.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/c36baca06efa833adaefba61f45fefdc49b6d070 |
| https://git.kernel.org/stable/c/3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566 |
