# CVE-2024-53116: linux: In the Linux kernel, the following vulnerability has been resolved:  drm/panthor: Fix handling of partial GPU mapping...

CVE-2024-53116 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-53116, released December 2, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-53116
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 2, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  drm/panthor: Fix handling of partial GPU mapping of BOs  This commit fixes the bug in the handling of partial mapping of the buffer objects to the GPU, which caused kernel warnings.  Panthor didn't correctly handle the case where the partial mapping spanned multiple scatterlists and the mapping offset didn't point to the 1st page of starting scatterlist. The offset variable was not cleared after reaching the starting scatterlist.  Following warning messages were seen. WARNING: CPU: 1 PID: 650 at drivers/iommu/io-pgtable-arm.c:659 __arm_lpae_unmap+0x254/0x5a0 <snip> pc : __arm_lpae_unmap+0x254/0x5a0 lr : __arm_lpae_unmap+0x2cc/0x5a0 <snip> Call trace:  __arm_lpae_unmap+0x254/0x5a0  __arm_lpae_unmap+0x108/0x5a0  __arm_lpae_unmap+0x108/0x5a0  __arm_lpae_unmap+0x108/0x5a0  arm_lpae_unmap_pages+0x80/0xa0  panthor_vm_unmap_pages+0xac/0x1c8 [panthor]  panthor_gpuva_sm_step_unmap+0x4c/0xc8 [panthor]  op_unmap_cb.isra.23.constprop.30+0x54/0x80  __drm_gpuvm_sm_unmap+0x184/0x1c8  drm_gpuvm_sm_unmap+0x40/0x60  panthor_vm_exec_op+0xa8/0x120 [panthor]  panthor_vm_bind_exec_sync_op+0xc4/0xe8 [panthor]  panthor_ioctl_vm_bind+0x10c/0x170 [panthor]  drm_ioctl_kernel+0xbc/0x138  drm_ioctl+0x210/0x4b0  __arm64_sys_ioctl+0xb0/0xf8  invoke_syscall+0x4c/0x110  el0_svc_common.constprop.1+0x98/0xf8  do_el0_svc+0x24/0x38  el0_svc+0x34/0xc8  el0t_64_sync_handler+0xa0/0xc8  el0t_64_sync+0x174/0x178 <snip> panthor : [drm] drm_WARN_ON(unmapped_sz != pgsize * pgcount) WARNING: CPU: 1 PID: 650 at drivers/gpu/drm/panthor/panthor_mmu.c:922 panthor_vm_unmap_pages+0x124/0x1c8 [panthor] <snip> pc : panthor_vm_unmap_pages+0x124/0x1c8 [panthor] lr : panthor_vm_unmap_pages+0x124/0x1c8 [panthor] <snip> panthor : [drm] *ERROR* failed to unmap range ffffa388f000-ffffa3890000 (requested range ffffa388c000-ffffa3890000)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.11.10-1 | [DEBIAN-CVE-2024-53116](https://patchblox.com/security/data/fix/linux/debian-cve-2024-53116.md) | Dec 2, 2024 |
| Linux | linux Debian 14 | 6.11.10-1 | [DEBIAN-CVE-2024-53116](https://patchblox.com/security/data/fix/linux/debian-cve-2024-53116.md) | Dec 2, 2024 |

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