| 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-2024-44982: drm/msm/dpu: cleanup FB if dpu_format_populate_layout fails |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/msm/dpu: cleanup FB if dpu_format_populate_layout fails |
| |
| If the dpu_format_populate_layout() fails, then FB is prepared, but not |
| cleaned up. This ends up leaking the pin_count on the GEM object and |
| causes a splat during DRM file closure: |
| |
| msm_obj->pin_count |
| WARNING: CPU: 2 PID: 569 at drivers/gpu/drm/msm/msm_gem.c:121 update_lru_locked+0xc4/0xcc |
| [...] |
| Call trace: |
| update_lru_locked+0xc4/0xcc |
| put_pages+0xac/0x100 |
| msm_gem_free_object+0x138/0x180 |
| drm_gem_object_free+0x1c/0x30 |
| drm_gem_object_handle_put_unlocked+0x108/0x10c |
| drm_gem_object_release_handle+0x58/0x70 |
| idr_for_each+0x68/0xec |
| drm_gem_release+0x28/0x40 |
| drm_file_free+0x174/0x234 |
| drm_release+0xb0/0x160 |
| __fput+0xc0/0x2c8 |
| __fput_sync+0x50/0x5c |
| __arm64_sys_close+0x38/0x7c |
| invoke_syscall+0x48/0x118 |
| el0_svc_common.constprop.0+0x40/0xe0 |
| do_el0_svc+0x1c/0x28 |
| el0_svc+0x4c/0x120 |
| el0t_64_sync_handler+0x100/0x12c |
| el0t_64_sync+0x190/0x194 |
| irq event stamp: 129818 |
| hardirqs last enabled at (129817): [<ffffa5f6d953fcc0>] console_unlock+0x118/0x124 |
| hardirqs last disabled at (129818): [<ffffa5f6da7dcf04>] el1_dbg+0x24/0x8c |
| softirqs last enabled at (129808): [<ffffa5f6d94afc18>] handle_softirqs+0x4c8/0x4e8 |
| softirqs last disabled at (129785): [<ffffa5f6d94105e4>] __do_softirq+0x14/0x20 |
| |
| Patchwork: https://patchwork.freedesktop.org/patch/600714/ |
| |
| The Linux kernel CVE team has assigned CVE-2024-44982 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 5.15.166 with commit 9b8b65211a880af8fe8330a101e1e239a2d4008f |
| Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 6.1.107 with commit 7ecf85542169012765e4c2817cd3be6c2e009962 |
| Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 6.6.48 with commit a3c5815b07f4ee19d0b7e2ddf91ff9f03ecbf27d |
| Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 6.10.7 with commit 02193c70723118889281f75b88722b26b58bf4ae |
| Issue introduced in 4.19 with commit 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef and fixed in 6.11 with commit bfa1a6283be390947d3649c482e5167186a37016 |
| |
| 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-2024-44982 |
| 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/msm/disp/dpu1/dpu_plane.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/9b8b65211a880af8fe8330a101e1e239a2d4008f |
| https://git.kernel.org/stable/c/7ecf85542169012765e4c2817cd3be6c2e009962 |
| https://git.kernel.org/stable/c/a3c5815b07f4ee19d0b7e2ddf91ff9f03ecbf27d |
| https://git.kernel.org/stable/c/02193c70723118889281f75b88722b26b58bf4ae |
| https://git.kernel.org/stable/c/bfa1a6283be390947d3649c482e5167186a37016 |
