In the Linux kernel, the following vulnerability has been resolved:
net: dsa: sja1105: round up PTP perout pin duration
pin_duration is converted from the user-provided period to SJA1105 clock ticks and is later passed as the cycle_time argument to future_base_time().
Very small period values may become zero after the conversion, which can lead to a division by zero in future_base_time().
Round zero pin_duration up to 1 tick so that the smallest unsupported periods use the minimum non-zero hardware duration instead of passing zero to future_base_time().
References
- https://git.kernel.org/stable/c/09efce96c909dff1a9317ec3714b7ddb4751b7af
- https://git.kernel.org/stable/c/201dcbbfb27f3db85c8cf125a75f3164a83ceb32
- https://git.kernel.org/stable/c/28d13a89a211cc07caeef32069eaa847131b7351
- https://git.kernel.org/stable/c/410629528067029096dba7ad7bc49e4a5e92708d
- https://git.kernel.org/stable/c/9952291db7125b8a62bf19800b93dcac81fc70c0
- https://git.kernel.org/stable/c/aaf446099ca497c8d9a8e511fedf5d0e547bf8ec
- https://git.kernel.org/stable/c/aee5836273b07b439fb245fb43930664d8b78518
- https://git.kernel.org/stable/c/fc62bfd30d30af07356f0f7121c826e1e753582f