| 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-2023-52619: pstore/ram: Fix crash when setting number of cpus to an odd number |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| pstore/ram: Fix crash when setting number of cpus to an odd number |
| |
| When the number of cpu cores is adjusted to 7 or other odd numbers, |
| the zone size will become an odd number. |
| The address of the zone will become: |
| addr of zone0 = BASE |
| addr of zone1 = BASE + zone_size |
| addr of zone2 = BASE + zone_size*2 |
| ... |
| The address of zone1/3/5/7 will be mapped to non-alignment va. |
| Eventually crashes will occur when accessing these va. |
| |
| So, use ALIGN_DOWN() to make sure the zone size is even |
| to avoid this bug. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52619 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.19.307 with commit 8b69c30f4e8b69131d92096cb296dc1f217101e4 |
| Fixed in 5.4.269 with commit e9f6ac50890104fdf8194f2865680689239d30fb |
| Fixed in 5.10.210 with commit a63e48cd835c34c38ef671d344cc029b1ea5bf10 |
| Fixed in 5.15.149 with commit 2a37905d47bffec61e95d99f0c1cc5dc6377956c |
| Fixed in 6.1.77 with commit 75b0f71b26b3ad833c5c0670109c0af6e021e86a |
| Fixed in 6.6.16 with commit 0593cfd321df9001142a9d2c58d4144917dff7ee |
| Fixed in 6.7.4 with commit cd40e43f870cf21726b22487a95ed223790b3542 |
| Fixed in 6.8 with commit d49270a04623ce3c0afddbf3e984cb245aa48e9c |
| |
| 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-2023-52619 |
| 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: |
| fs/pstore/ram.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/8b69c30f4e8b69131d92096cb296dc1f217101e4 |
| https://git.kernel.org/stable/c/e9f6ac50890104fdf8194f2865680689239d30fb |
| https://git.kernel.org/stable/c/a63e48cd835c34c38ef671d344cc029b1ea5bf10 |
| https://git.kernel.org/stable/c/2a37905d47bffec61e95d99f0c1cc5dc6377956c |
| https://git.kernel.org/stable/c/75b0f71b26b3ad833c5c0670109c0af6e021e86a |
| https://git.kernel.org/stable/c/0593cfd321df9001142a9d2c58d4144917dff7ee |
| https://git.kernel.org/stable/c/cd40e43f870cf21726b22487a95ed223790b3542 |
| https://git.kernel.org/stable/c/d49270a04623ce3c0afddbf3e984cb245aa48e9c |
