| 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-2022-49100: virtio_console: eliminate anonymous module_init & module_exit |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| virtio_console: eliminate anonymous module_init & module_exit |
| |
| Eliminate anonymous module_init() and module_exit(), which can lead to |
| confusion or ambiguity when reading System.map, crashes/oops/bugs, |
| or an initcall_debug log. |
| |
| Give each of these init and exit functions unique driver-specific |
| names to eliminate the anonymous names. |
| |
| Example 1: (System.map) |
| ffffffff832fc78c t init |
| ffffffff832fc79e t init |
| ffffffff832fc8f8 t init |
| |
| Example 2: (initcall_debug log) |
| calling init+0x0/0x12 @ 1 |
| initcall init+0x0/0x12 returned 0 after 15 usecs |
| calling init+0x0/0x60 @ 1 |
| initcall init+0x0/0x60 returned 0 after 2 usecs |
| calling init+0x0/0x9a @ 1 |
| initcall init+0x0/0x9a returned 0 after 74 usecs |
| |
| The Linux kernel CVE team has assigned CVE-2022-49100 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.9.311 with commit 93e3d88321d2274fa4e26b006e19cc10fec331c2 |
| Fixed in 4.14.276 with commit 7deaddb704713608e0ae559e27185581b9af71a0 |
| Fixed in 4.19.238 with commit 0f3d824bd70a1303464d5e93ee3e7afe7832fe89 |
| Fixed in 5.4.189 with commit 3504b0a177208eda85bf472bbf7c9aa77d2b8343 |
| Fixed in 5.10.111 with commit c69b442125bf009fce26e15aa5616caf8a3673c3 |
| Fixed in 5.15.34 with commit 44c2d5fbe7b2bd1f8cb114d608a591a73a5d4ae6 |
| Fixed in 5.16.20 with commit 3fd5dee7404ce40c79cba468bb2510115639d975 |
| Fixed in 5.17.3 with commit 71612aee09ecea3475f8751dc841d75a011b1fd0 |
| Fixed in 5.18 with commit fefb8a2a941338d871e2d83fbd65fbfa068857bd |
| |
| 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-2022-49100 |
| 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/char/virtio_console.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/93e3d88321d2274fa4e26b006e19cc10fec331c2 |
| https://git.kernel.org/stable/c/7deaddb704713608e0ae559e27185581b9af71a0 |
| https://git.kernel.org/stable/c/0f3d824bd70a1303464d5e93ee3e7afe7832fe89 |
| https://git.kernel.org/stable/c/3504b0a177208eda85bf472bbf7c9aa77d2b8343 |
| https://git.kernel.org/stable/c/c69b442125bf009fce26e15aa5616caf8a3673c3 |
| https://git.kernel.org/stable/c/44c2d5fbe7b2bd1f8cb114d608a591a73a5d4ae6 |
| https://git.kernel.org/stable/c/3fd5dee7404ce40c79cba468bb2510115639d975 |
| https://git.kernel.org/stable/c/71612aee09ecea3475f8751dc841d75a011b1fd0 |
| https://git.kernel.org/stable/c/fefb8a2a941338d871e2d83fbd65fbfa068857bd |
