| 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-2021-47142: drm/amdgpu: Fix a use-after-free |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amdgpu: Fix a use-after-free |
| |
| looks like we forget to set ttm->sg to NULL. |
| Hit panic below |
| |
| [ 1235.844104] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b7b4b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI |
| [ 1235.989074] Call Trace: |
| [ 1235.991751] sg_free_table+0x17/0x20 |
| [ 1235.995667] amdgpu_ttm_backend_unbind.cold+0x4d/0xf7 [amdgpu] |
| [ 1236.002288] amdgpu_ttm_backend_destroy+0x29/0x130 [amdgpu] |
| [ 1236.008464] ttm_tt_destroy+0x1e/0x30 [ttm] |
| [ 1236.013066] ttm_bo_cleanup_memtype_use+0x51/0xa0 [ttm] |
| [ 1236.018783] ttm_bo_release+0x262/0xa50 [ttm] |
| [ 1236.023547] ttm_bo_put+0x82/0xd0 [ttm] |
| [ 1236.027766] amdgpu_bo_unref+0x26/0x50 [amdgpu] |
| [ 1236.032809] amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x7aa/0xd90 [amdgpu] |
| [ 1236.040400] kfd_ioctl_alloc_memory_of_gpu+0xe2/0x330 [amdgpu] |
| [ 1236.046912] kfd_ioctl+0x463/0x690 [amdgpu] |
| |
| The Linux kernel CVE team has assigned CVE-2021-47142 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.4.271 with commit 0707c3fea8102d211631ba515ef2159707561b0d |
| Fixed in 4.9.271 with commit 3293cf3513d69f00c14d43e2020826d45ea0e46a |
| Fixed in 4.14.235 with commit 952ab3f9f48eb0e8050596d41951cf516be6b122 |
| Fixed in 4.19.193 with commit a849e218556f932576c0fb1c5a88714b61709a17 |
| Fixed in 5.4.124 with commit 7398c2aab4da960761ec182d04d6d5abbb4a226e |
| Fixed in 5.10.42 with commit f98cdf084405333ee2f5be548a91b2d168e49276 |
| Fixed in 5.12.9 with commit d4ea141fd4b40636a8326df5a377d9c5cf9b3faa |
| Fixed in 5.13 with commit 1e5c37385097c35911b0f8a0c67ffd10ee1af9a2 |
| |
| 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-2021-47142 |
| 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_ttm.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/0707c3fea8102d211631ba515ef2159707561b0d |
| https://git.kernel.org/stable/c/3293cf3513d69f00c14d43e2020826d45ea0e46a |
| https://git.kernel.org/stable/c/952ab3f9f48eb0e8050596d41951cf516be6b122 |
| https://git.kernel.org/stable/c/a849e218556f932576c0fb1c5a88714b61709a17 |
| https://git.kernel.org/stable/c/7398c2aab4da960761ec182d04d6d5abbb4a226e |
| https://git.kernel.org/stable/c/f98cdf084405333ee2f5be548a91b2d168e49276 |
| https://git.kernel.org/stable/c/d4ea141fd4b40636a8326df5a377d9c5cf9b3faa |
| https://git.kernel.org/stable/c/1e5c37385097c35911b0f8a0c67ffd10ee1af9a2 |
