Bug 2355447 (CVE-2023-53002)

Summary: CVE-2023-53002 kernel: drm/i915: Fix a memory leak with reused mmap_offset
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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OS: Linux   
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Description OSIDB Bzimport 2025-03-27 17:01:57 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/i915: Fix a memory leak with reused mmap_offset

drm_vma_node_allow() and drm_vma_node_revoke() should be called in
balanced pairs. We call drm_vma_node_allow() once per-file everytime a
user calls mmap_offset, but only call drm_vma_node_revoke once per-file
on each mmap_offset. As the mmap_offset is reused by the client, the
per-file vm_count may remain non-zero and the rbtree leaked.

Call drm_vma_node_allow_once() instead to prevent that memory leak.
Comment 1 Robb Gatica 2025-03-28 00:54:16 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025032712-CVE-2023-53002-1f76@gregkh/T