| 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-2024-46709: drm/vmwgfx: Fix prime with external buffers |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/vmwgfx: Fix prime with external buffers |
| |
| Make sure that for external buffers mapping goes through the dma_buf |
| interface instead of trying to access pages directly. |
| |
| External buffers might not provide direct access to readable/writable |
| pages so to make sure the bo's created from external dma_bufs can be |
| read dma_buf interface has to be used. |
| |
| Fixes crashes in IGT's kms_prime with vgem. Regular desktop usage won't |
| trigger this due to the fact that virtual machines will not have |
| multiple GPUs but it enables better test coverage in IGT. |
| |
| The Linux kernel CVE team has assigned CVE-2024-46709 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6.29 with commit 65674218b43f2dd54587ab2b06560e17c30d8b41 and fixed in 6.6.49 with commit 9a9716bbbf3dd6b6cbefba3abcc89af8b72631f4 |
| Issue introduced in 6.9 with commit b32233accefff1338806f064fb9b62cf5bc0609f and fixed in 6.10.8 with commit 5c12391ee1ab59cb2f3be3f1f5e6d0fc0c2dc854 |
| Issue introduced in 6.9 with commit b32233accefff1338806f064fb9b62cf5bc0609f and fixed in 6.11 with commit 50f1199250912568606b3778dc56646c10cb7b04 |
| Issue introduced in 6.8.8 with commit 2cdb71c975a10b8774fcd199f16f9ea88948de50 |
| |
| 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-2024-46709 |
| 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/vmwgfx/vmwgfx_blit.c |
| drivers/gpu/drm/vmwgfx/vmwgfx_drv.h |
| drivers/gpu/drm/vmwgfx/vmwgfx_stdu.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/9a9716bbbf3dd6b6cbefba3abcc89af8b72631f4 |
| https://git.kernel.org/stable/c/5c12391ee1ab59cb2f3be3f1f5e6d0fc0c2dc854 |
| https://git.kernel.org/stable/c/50f1199250912568606b3778dc56646c10cb7b04 |
