cve-2024-49872
Vulnerability from cvelistv5
Published
2024-10-21 18:01
Modified
2024-12-19 09:27
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/gup: fix memfd_pin_folios alloc race panic If memfd_pin_folios tries to create a hugetlb page, but someone else already did, then folio gets the value -EEXIST here: folio = memfd_alloc_folio(memfd, start_idx); if (IS_ERR(folio)) { ret = PTR_ERR(folio); if (ret != -EEXIST) goto err; then on the next trip through the "while start_idx" loop we panic here: if (folio) { folio_put(folio); To fix, set the folio to NULL on error.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ce645b9fdc78ec5d28067286e92871ddae6817d5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e28f39b359c0cfdcc011603e51187085a5f1e5e3Patch
Impacted products
Vendor Product Version
Linux Linux Version: 89c1905d9c140372b7f50ef48f42378cf85d9bc5
Version: 89c1905d9c140372b7f50ef48f42378cf85d9bc5
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   Linux Linux Version: 6.11
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