| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-22049: LoongArch: Increase ARCH_DMA_MINALIGN up to 16 |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| LoongArch: Increase ARCH_DMA_MINALIGN up to 16 |
| |
| ARCH_DMA_MINALIGN is 1 by default, but some LoongArch-specific devices |
| (such as APBDMA) require 16 bytes alignment. When the data buffer length |
| is too small, the hardware may make an error writing cacheline. Thus, it |
| is dangerous to allocate a small memory buffer for DMA. It's always safe |
| to define ARCH_DMA_MINALIGN as L1_CACHE_BYTES but unnecessary (kmalloc() |
| need small memory objects). Therefore, just increase it to 16. |
| |
| The Linux kernel CVE team has assigned CVE-2025-22049 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.19 with commit fa96b57c149061f71a70bd6582d995f6424fbbf4 and fixed in 6.1.134 with commit f39af67f03b564b763b06e44cb960c10a382d54a |
| Issue introduced in 5.19 with commit fa96b57c149061f71a70bd6582d995f6424fbbf4 and fixed in 6.6.87 with commit 279ec25c2df49fba1cd9488f2ddd045d9cb2112e |
| Issue introduced in 5.19 with commit fa96b57c149061f71a70bd6582d995f6424fbbf4 and fixed in 6.12.23 with commit 1d0def2d1658666ec1f32c9495df60e7411e3c82 |
| Issue introduced in 5.19 with commit fa96b57c149061f71a70bd6582d995f6424fbbf4 and fixed in 6.13.11 with commit bfff341cac7c650e6ca8d10503725992f5564d0f |
| Issue introduced in 5.19 with commit fa96b57c149061f71a70bd6582d995f6424fbbf4 and fixed in 6.14.2 with commit 8b82aea3666f8f2c78f86148d78aea99c46e0f82 |
| Issue introduced in 5.19 with commit fa96b57c149061f71a70bd6582d995f6424fbbf4 and fixed in 6.15 with commit 4103cfe9dcb88010ae4911d3ff417457d1b6a720 |
| |
| 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-2025-22049 |
| 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: |
| arch/loongarch/include/asm/cache.h |
| |
| |
| 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/f39af67f03b564b763b06e44cb960c10a382d54a |
| https://git.kernel.org/stable/c/279ec25c2df49fba1cd9488f2ddd045d9cb2112e |
| https://git.kernel.org/stable/c/1d0def2d1658666ec1f32c9495df60e7411e3c82 |
| https://git.kernel.org/stable/c/bfff341cac7c650e6ca8d10503725992f5564d0f |
| https://git.kernel.org/stable/c/8b82aea3666f8f2c78f86148d78aea99c46e0f82 |
| https://git.kernel.org/stable/c/4103cfe9dcb88010ae4911d3ff417457d1b6a720 |
