Description
In the Linux kernel, the following vulnerability has been resolved: iommufd: Don't overflow during division for dirty tracking If pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow to 0 and this triggers divide by 0. In this case the index should just be 0, so reorganize things to divide by shift and avoid hitting any overflows.
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
58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 to < 07105e61882ff4a7d58db63cc5f9e90c6c60506caffected58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 to < 4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69affected58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 to < de7f2c67ceb1941b05b04ac35458a03e93cc57b1affected58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 to < dbf316fc90aa954dcd5440817f4b944627ed63e0affected58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 to < cb30dfa75d55eced379a42fd67bd5fb7ec38555eaffected
Linux Linux
Default version status: affected
6.1affected0 to < 6.1unaffected6.1.159 to ≤ 6.1.*unaffected6.6.117 to ≤ 6.6.*unaffected6.12.58 to ≤ 6.12.*unaffected6.17.8 to ≤ 6.17.*unaffected6.18 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c ↗
- https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69 ↗
- https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1 ↗
- https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0 ↗
- https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e ↗