| 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-2023-52511: spi: sun6i: reduce DMA RX transfer width to single byte |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| spi: sun6i: reduce DMA RX transfer width to single byte |
| |
| Through empirical testing it has been determined that sometimes RX SPI |
| transfers with DMA enabled return corrupted data. This is down to single |
| or even multiple bytes lost during DMA transfer from SPI peripheral to |
| memory. It seems the RX FIFO within the SPI peripheral can become |
| confused when performing bus read accesses wider than a single byte to it |
| during an active SPI transfer. |
| |
| This patch reduces the width of individual DMA read accesses to the |
| RX FIFO to a single byte to mitigate that issue. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52511 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.15.134 with commit ff05ed4ae214011464a0156f05cac1b0b46b5fbc |
| Fixed in 6.1.56 with commit e15bb292b24630ee832bfc7fd616bd72c7682bbb |
| Fixed in 6.5.6 with commit b3c21c9c7289692f4019f163c3b06d8bdf78b355 |
| Fixed in 6.6 with commit 171f8a49f212e87a8b04087568e1b3d132e36a18 |
| |
| 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-2023-52511 |
| 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/spi/spi-sun6i.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/ff05ed4ae214011464a0156f05cac1b0b46b5fbc |
| https://git.kernel.org/stable/c/e15bb292b24630ee832bfc7fd616bd72c7682bbb |
| https://git.kernel.org/stable/c/b3c21c9c7289692f4019f163c3b06d8bdf78b355 |
| https://git.kernel.org/stable/c/171f8a49f212e87a8b04087568e1b3d132e36a18 |
