cve-2024-39477
Vulnerability from cvelistv5
Published
2024-07-05 06:55
Modified
2024-12-19 09:06
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: do not call vma_add_reservation upon ENOMEM sysbot reported a splat [1] on __unmap_hugepage_range(). This is because vma_needs_reservation() can return -ENOMEM if allocate_file_region_entries() fails to allocate the file_region struct for the reservation. Check for that and do not call vma_add_reservation() if that is the case, otherwise region_abort() and region_del() will see that we do not have any file_regions. If we detect that vma_needs_reservation() returned -ENOMEM, we clear the hugetlb_restore_reserve flag as if this reservation was still consumed, so free_huge_folio() will not increment the resv count. [1] https://lore.kernel.org/linux-mm/0000000000004096100617c58d54@google.com/T/#ma5983bc1ab18a54910da83416b3f89f3c7ee43aa
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8daf9c702ee7f825f0de8600abff764acfedea13Mailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aa998f9dcb34c28448f86e8f5490f20d5eb0eac7Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8daf9c702ee7f825f0de8600abff764acfedea13Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/aa998f9dcb34c28448f86e8f5490f20d5eb0eac7Mailing List, Patch
Impacted products
Vendor Product Version
Linux Linux Version: df7a6d1f64056aec572162c5d35ed9ff86ece6f3
Version: df7a6d1f64056aec572162c5d35ed9ff86ece6f3
 Create a notification for this product.
   Linux Linux Version: 6.9
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