Description
In the Linux kernel, the following vulnerability has been resolved: arm64: mte: Do not warn if the page is already tagged in copy_highpage() The arm64 copy_highpage() assumes that the destination page is newly allocated and not MTE-tagged (PG_mte_tagged unset) and warns accordingly. However, following commit 060913999d7a ("mm: migrate: support poisoned recover from migrate folio"), folio_mc_copy() is called before __folio_migrate_mapping(). If the latter fails (-EAGAIN), the copy will be done again to the same destination page. Since copy_highpage() already set the PG_mte_tagged flag, this second copy will warn. Replace the WARN_ON_ONCE(page already tagged) in the arm64 copy_highpage() with a comment.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
060913999d7a9e50c283fdb15253fc27974ddadc to < 5ff5765a1fc526f07d3bbaedb061d970eb13bcf4affected060913999d7a9e50c283fdb15253fc27974ddadc to < 0bbf3fc6e9211fce9889fe8efbb89c220504d617affected060913999d7a9e50c283fdb15253fc27974ddadc to < b98c94eed4a975e0c80b7e90a649a46967376f58affected
Linux Linux
Default version status: affected
6.11affected0 to < 6.11unaffected6.12.56 to ≤ 6.12.*unaffected6.17.6 to ≤ 6.17.*unaffected6.18 to ≤ *unaffected