| 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-2024-42127: drm/lima: fix shared irq handling on driver remove |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/lima: fix shared irq handling on driver remove |
| |
| lima uses a shared interrupt, so the interrupt handlers must be prepared |
| to be called at any time. At driver removal time, the clocks are |
| disabled early and the interrupts stay registered until the very end of |
| the remove process due to the devm usage. |
| This is potentially a bug as the interrupts access device registers |
| which assumes clocks are enabled. A crash can be triggered by removing |
| the driver in a kernel with CONFIG_DEBUG_SHIRQ enabled. |
| This patch frees the interrupts at each lima device finishing callback |
| so that the handlers are already unregistered by the time we fully |
| disable clocks. |
| |
| The Linux kernel CVE team has assigned CVE-2024-42127 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.4.280 with commit 0d60c43df59ef01c08dc7b0c45495178f9d05a13 |
| Fixed in 5.10.222 with commit 25d0d9b83d855cbc5d5aa5ae3cd79d55ea0c84a8 |
| Fixed in 5.15.163 with commit 17fe8b75aaf0bb1bdc31368963446b421c22d0af |
| Fixed in 6.1.98 with commit 0a487e977cb8897ae4c51ecd34bbaa2b005266c9 |
| Fixed in 6.6.39 with commit 04d531b9a1875846d4f89953b469ad463aa7a770 |
| Fixed in 6.9.9 with commit b5daf9217a50636a969bc1965f827878aeb09ffe |
| Fixed in 6.10 with commit a6683c690bbfd1f371510cb051e8fa49507f3f5e |
| |
| 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-2024-42127 |
| 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/gpu/drm/lima/lima_gp.c |
| drivers/gpu/drm/lima/lima_mmu.c |
| drivers/gpu/drm/lima/lima_pp.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/0d60c43df59ef01c08dc7b0c45495178f9d05a13 |
| https://git.kernel.org/stable/c/25d0d9b83d855cbc5d5aa5ae3cd79d55ea0c84a8 |
| https://git.kernel.org/stable/c/17fe8b75aaf0bb1bdc31368963446b421c22d0af |
| https://git.kernel.org/stable/c/0a487e977cb8897ae4c51ecd34bbaa2b005266c9 |
| https://git.kernel.org/stable/c/04d531b9a1875846d4f89953b469ad463aa7a770 |
| https://git.kernel.org/stable/c/b5daf9217a50636a969bc1965f827878aeb09ffe |
| https://git.kernel.org/stable/c/a6683c690bbfd1f371510cb051e8fa49507f3f5e |
