| 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-2022-49137: drm/amd/amdgpu/amdgpu_cs: fix refcount leak of a dma_fence obj |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/amdgpu/amdgpu_cs: fix refcount leak of a dma_fence obj |
| |
| This issue takes place in an error path in |
| amdgpu_cs_fence_to_handle_ioctl(). When `info->in.what` falls into |
| default case, the function simply returns -EINVAL, forgetting to |
| decrement the reference count of a dma_fence obj, which is bumped |
| earlier by amdgpu_cs_get_fence(). This may result in reference count |
| leaks. |
| |
| Fix it by decreasing the refcount of specific object before returning |
| the error code. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49137 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.19.238 with commit 72d77ddb2224ebc00648f4f78f8a9a259dccbdf7 |
| Fixed in 5.4.189 with commit 4009f104b02b223d1a11d74b36b1cc083bc37028 |
| Fixed in 5.10.111 with commit 927beb05aaa429c883cc0ec6adc48964b187e291 |
| Fixed in 5.15.34 with commit 3edd8646cb7c11b57c90e026bda6f21076223f5b |
| Fixed in 5.16.20 with commit b6d1f7d97c81ebaf2cda9c4c943ee2e484fffdcf |
| Fixed in 5.17.3 with commit bc2d5c0775c839e2b072884f4ee6a93ba410f107 |
| Fixed in 5.18 with commit dfced44f122c500004a48ecc8db516bb6a295a1b |
| |
| 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-2022-49137 |
| 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_cs.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/72d77ddb2224ebc00648f4f78f8a9a259dccbdf7 |
| https://git.kernel.org/stable/c/4009f104b02b223d1a11d74b36b1cc083bc37028 |
| https://git.kernel.org/stable/c/927beb05aaa429c883cc0ec6adc48964b187e291 |
| https://git.kernel.org/stable/c/3edd8646cb7c11b57c90e026bda6f21076223f5b |
| https://git.kernel.org/stable/c/b6d1f7d97c81ebaf2cda9c4c943ee2e484fffdcf |
| https://git.kernel.org/stable/c/bc2d5c0775c839e2b072884f4ee6a93ba410f107 |
| https://git.kernel.org/stable/c/dfced44f122c500004a48ecc8db516bb6a295a1b |
