| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-46843: scsi: ufs: core: Remove SCSI host only if added |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| scsi: ufs: core: Remove SCSI host only if added |
| |
| If host tries to remove ufshcd driver from a UFS device it would cause a |
| kernel panic if ufshcd_async_scan fails during ufshcd_probe_hba before |
| adding a SCSI host with scsi_add_host and MCQ is enabled since SCSI host |
| has been defered after MCQ configuration introduced by commit 0cab4023ec7b |
| ("scsi: ufs: core: Defer adding host to SCSI if MCQ is supported"). |
| |
| To guarantee that SCSI host is removed only if it has been added, set the |
| scsi_host_added flag to true after adding a SCSI host and check whether it |
| is set or not before removing it. |
| |
| The Linux kernel CVE team has assigned CVE-2024-46843 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.3 with commit 0cab4023ec7b49b18145f74ab8389678d6d58878 and fixed in 6.6.51 with commit 2f49e05d6b58d660f035a75ff96b77071b4bd5ed |
| Issue introduced in 6.3 with commit 0cab4023ec7b49b18145f74ab8389678d6d58878 and fixed in 6.10.10 with commit 3844586e9bd9845140e1078f1e61896b576ac536 |
| Issue introduced in 6.3 with commit 0cab4023ec7b49b18145f74ab8389678d6d58878 and fixed in 6.11 with commit 7cbff570dbe8907e23bba06f6414899a0fbb2fcc |
| |
| 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-2024-46843 |
| 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/ufs/core/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/2f49e05d6b58d660f035a75ff96b77071b4bd5ed |
| https://git.kernel.org/stable/c/3844586e9bd9845140e1078f1e61896b576ac536 |
| https://git.kernel.org/stable/c/7cbff570dbe8907e23bba06f6414899a0fbb2fcc |
