Description (CNA)
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
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected df7a6d1f64056aec572162c5d35ed9ff86ece6f3 before aa998f9dcb34c28448f86e8f5490f20d5eb0eac7; affected df7a6d1f64056aec572162c5d35ed9ff86ece6f3 before 8daf9c702ee7f825f0de8600abff764acfedea13 |
| Linux / Linux | affected 6.9; unaffected 0 before 6.9; unaffected 6.9.5 through 6.9.*; unaffected 6.10 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/aa998f9dcb34c28448f86e8f5490f20d5eb0eac7
- https://git.kernel.org/stable/c/8daf9c702ee7f825f0de8600abff764acfedea13
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.