mm/smaps: fix race between smaps_hugetlb_range and migration
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.6.160, 6.12.43, 6.15.11, 6.16.2
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/smaps: fix race between smaps_hugetlb_range and migration smaps_hugetlb_range() handles the pte without holdling ptl, and may be concurrenct with migration, leaing to BUG_ON in pfn_swap_entry_to_page(). The race is as follows. smaps_hugetlb_range migrate_pages huge_ptep_get remove_migration_ptes folio_unlock pfn_swap_entry_folio BUG_ON To fix it, hold ptl lock in smaps_hugetlb_range().
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 25ee01a2fca02dfb5a3ce316e77910c468108199 · fixed in f76089018b34dbe0c2e9b67c5b7d8860668748bb; From 25ee01a2fca02dfb5a3ce316e77910c468108199 · fixed in 2a1f3663974162b8f1e098196f557cfc1d160138; From 25ee01a2fca02dfb5a3ce316e77910c468108199 · fixed in 09fc018f48871123ad5dbd7b03c956580232ed76; From 25ee01a2fca02dfb5a3ce316e77910c468108199 · fixed in b625883ccbcc2b57808db51d1375b1d7b9bcb3e5; From 25ee01a2fca02dfb5a3ce316e77910c468108199 · fixed in 45d19b4b6c2d422771c29b83462d84afcbb33f01
- Linux Linux
4.4
- KernelLinux
From 4.4.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.43; From 6.13.0 · fixed in 6.15.11; From 6.16.0 · fixed in 6.16.2