> From: Stephen Hemminger [mailto:[email protected]] > Sent: Tuesday, 16 June 2026 23.06 > > The IP reassembly library tracks only a running byte total and reserved > slots for the first and last fragments, with no coverage map. As a > result > it mishandles duplicate, overlapping, oversized, and misheadered > fragments, and the IPv4 key is missing a field RFC 791 requires. There > was also no functional test to catch any of it. > > These came out of reviewing a duplicate-fragment report on the list. > > Patches 1 and 2 are interdependent: the overlap discard relies on the > duplicate handling so an exact duplicate is dropped on its own rather > than discarding the whole datagram. The rest are independent. > > Patch 6 adds a functional test modeled on the Linux selftest > ip_defrag.c. > It passes on this series; with any single fix reverted the matching > case > fails.
With patch 2/6 fixed, Series-acked-by: Morten Brørup <[email protected]>
