| 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-2024-58081: clk: mmp2: call pm_genpd_init() only after genpd.name is set |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| clk: mmp2: call pm_genpd_init() only after genpd.name is set |
| |
| Setting the genpd's struct device's name with dev_set_name() is |
| happening within pm_genpd_init(). If it remains NULL, things can blow up |
| later, such as when crafting the devfs hierarchy for the power domain: |
| |
| Unable to handle kernel NULL pointer dereference at virtual address 00000000 when read |
| ... |
| Call trace: |
| strlen from start_creating+0x90/0x138 |
| start_creating from debugfs_create_dir+0x20/0x178 |
| debugfs_create_dir from genpd_debug_add.part.0+0x4c/0x144 |
| genpd_debug_add.part.0 from genpd_debug_init+0x74/0x90 |
| genpd_debug_init from do_one_initcall+0x5c/0x244 |
| do_one_initcall from kernel_init_freeable+0x19c/0x1f4 |
| kernel_init_freeable from kernel_init+0x1c/0x12c |
| kernel_init from ret_from_fork+0x14/0x28 |
| |
| Bisecting tracks this crash back to commit 899f44531fe6 ("pmdomain: core: |
| Add GENPD_FLAG_DEV_NAME_FW flag"), which exchanges use of genpd->name |
| with dev_name(&genpd->dev) in genpd_debug_add.part(). |
| |
| The Linux kernel CVE team has assigned CVE-2024-58081 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.12 with commit 899f44531fe6cac4b024710fec647ecc127724b8 and fixed in 6.12.14 with commit eca01d5911fb34218d10a58d8d9534b758c8fd0a |
| Issue introduced in 6.12 with commit 899f44531fe6cac4b024710fec647ecc127724b8 and fixed in 6.13.3 with commit 763517124e27b07fa300b486d7d13c5d563a215e |
| Issue introduced in 6.12 with commit 899f44531fe6cac4b024710fec647ecc127724b8 and fixed in 6.14 with commit e24b15d4704dcb73920c3d18a6157abd18df08c1 |
| Issue introduced in 6.11.10 with commit 94a03c0400c9696735184c7d76630b818d0f5cca |
| |
| 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-2024-58081 |
| 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/clk/mmp/pwr-island.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/eca01d5911fb34218d10a58d8d9534b758c8fd0a |
| https://git.kernel.org/stable/c/763517124e27b07fa300b486d7d13c5d563a215e |
| https://git.kernel.org/stable/c/e24b15d4704dcb73920c3d18a6157abd18df08c1 |
