cve-2023-52455
Vulnerability from cvelistv5
Published
2024-02-23 14:46
Modified
2024-09-11 17:33
Severity
Summary
iommu: Don't reserve 0-length IOVA region
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5e23e283910c9f30248732ae0770bcb0c9438abfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/98b8a550da83cc392a14298c4b3eaaf0332ae6adPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bb57f6705960bebeb832142ce9abf43220c3eab1Patch
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu: Don\u0027t reserve 0-length IOVA region\n\nWhen the bootloader/firmware doesn\u0027t setup the framebuffers, their\naddress and size are 0 in \"iommu-addresses\" property. If IOVA region is\nreserved with 0 length, then it ends up corrupting the IOVA rbtree with\nan entry which has pfn_hi \u003c pfn_lo.\nIf we intend to use display driver in kernel without framebuffer then\nit\u0027s causing the display IOMMU mappings to fail as entire valid IOVA\nspace is reserved when address and length are passed as 0.\nAn ideal solution would be firmware removing the \"iommu-addresses\"\nproperty and corresponding \"memory-region\" if display is not present.\nBut the kernel should be able to handle this by checking for size of\nIOVA region and skipping the IOVA reservation if size is 0. Also, add\na warning if firmware is requesting 0-length IOVA region reservation."
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