| 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-2021-47258: scsi: core: Fix error handling of scsi_host_alloc() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| scsi: core: Fix error handling of scsi_host_alloc() |
| |
| After device is initialized via device_initialize(), or its name is set via |
| dev_set_name(), the device has to be freed via put_device(). Otherwise |
| device name will be leaked because it is allocated dynamically in |
| dev_set_name(). |
| |
| Fix the leak by replacing kfree() with put_device(). Since |
| scsi_host_dev_release() properly handles IDA and kthread removal, remove |
| special-casing these from the error handling as well. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47258 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.9.273 with commit 8958181c1663e24a13434448e7d6b96b5d04900a |
| Fixed in 4.14.237 with commit db08ce595dd64ea9859f7d088b51cbfc8e685c66 |
| Fixed in 4.19.195 with commit 2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a |
| Fixed in 5.4.126 with commit 79296e292d67fa7b5fb8d8c27343683e823872c8 |
| Fixed in 5.10.44 with commit 7a696ce1d5d16a33a6cd6400bbcc0339b2460e11 |
| Fixed in 5.12.11 with commit 45d83db4728127944b237c0c8248987df9d478e7 |
| Fixed in 5.13 with commit 66a834d092930cf41d809c0e989b13cd6f9ca006 |
| |
| 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-2021-47258 |
| 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/hosts.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/8958181c1663e24a13434448e7d6b96b5d04900a |
| https://git.kernel.org/stable/c/db08ce595dd64ea9859f7d088b51cbfc8e685c66 |
| https://git.kernel.org/stable/c/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a |
| https://git.kernel.org/stable/c/79296e292d67fa7b5fb8d8c27343683e823872c8 |
| https://git.kernel.org/stable/c/7a696ce1d5d16a33a6cd6400bbcc0339b2460e11 |
| https://git.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7 |
| https://git.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006 |
