Description
In the Linux kernel, the following vulnerability has been resolved: iommufd: Prevent ALIGN() overflow When allocating IOVA the candidate range gets aligned to the target alignment. If the range is close to ULONG_MAX then the ALIGN() can wrap resulting in a corrupted iova. Open code the ALIGN() using get_add_overflow() to prevent this. This simplifies the checks as we don't need to check for length earlier either. Consolidate the two copies of this code under a single helper. This bug would allow userspace to create a mapping that overlaps with some other mapping or a reserved range.
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
51fe6141f0f64ae0bbc096a41a07572273e8c0ef to < d19b817540c0abe84854a64ee9ee34cecc3bbeefaffected51fe6141f0f64ae0bbc096a41a07572273e8c0ef to < ebb6021560b94649bec6b8faba6fe0dca2218e81affected51fe6141f0f64ae0bbc096a41a07572273e8c0ef to < e42a046bb41dcdde4f766a17d8211842007ed537affected51fe6141f0f64ae0bbc096a41a07572273e8c0ef to < 79fad1917802c28de51a479318a056a6fbe3e2f2affected51fe6141f0f64ae0bbc096a41a07572273e8c0ef to < b42497e3c0e74db061eafad41c0cd7243c46436baffected
Linux Linux
Default version status: affected
6.2affected0 to < 6.2unaffected6.6.103 to ≤ 6.6.*unaffected6.12.43 to ≤ 6.12.*unaffected6.15.11 to ≤ 6.15.*unaffected6.16.2 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/d19b817540c0abe84854a64ee9ee34cecc3bbeef ↗
- https://git.kernel.org/stable/c/ebb6021560b94649bec6b8faba6fe0dca2218e81 ↗
- https://git.kernel.org/stable/c/e42a046bb41dcdde4f766a17d8211842007ed537 ↗
- https://git.kernel.org/stable/c/79fad1917802c28de51a479318a056a6fbe3e2f2 ↗
- https://git.kernel.org/stable/c/b42497e3c0e74db061eafad41c0cd7243c46436b ↗