| 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-2021-47144: drm/amd/amdgpu: fix refcount leak |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/amdgpu: fix refcount leak |
| |
| [Why] |
| the gem object rfb->base.obj[0] is get according to num_planes |
| in amdgpufb_create, but is not put according to num_planes |
| |
| [How] |
| put rfb->base.obj[0] in amdgpu_fbdev_destroy according to num_planes |
| |
| The Linux kernel CVE team has assigned CVE-2021-47144 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.19.193 with commit 599e5d61ace952b0bb9bd942b198bbd0cfded1d7 |
| Fixed in 5.4.124 with commit dde2656e0bbb2ac7d83a7bd95a8d5c3c95bbc009 |
| Fixed in 5.10.42 with commit 9fdb8ed37a3a44f9c49372b69f87fd5f61cb3240 |
| Fixed in 5.12.9 with commit 95a4ec905e51a30c64cf2d78b04a7acbeae5ca94 |
| Fixed in 5.13 with commit fa7e6abc75f3d491bc561734312d065dc9dc2a77 |
| |
| 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-2021-47144 |
| 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/amd/amdgpu/amdgpu_fb.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/599e5d61ace952b0bb9bd942b198bbd0cfded1d7 |
| https://git.kernel.org/stable/c/dde2656e0bbb2ac7d83a7bd95a8d5c3c95bbc009 |
| https://git.kernel.org/stable/c/9fdb8ed37a3a44f9c49372b69f87fd5f61cb3240 |
| https://git.kernel.org/stable/c/95a4ec905e51a30c64cf2d78b04a7acbeae5ca94 |
| https://git.kernel.org/stable/c/fa7e6abc75f3d491bc561734312d065dc9dc2a77 |
