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trashed after being freed. This has caused several panics including kern/42277 related to soft updates. Jim Kuhn tracked the problem down to ipfw limit rule processing. In the expiry of dynamic rules, it is possible for an O_LIMIT_PARENT rule to be removed when it still has live children. When the children eventually do expire, a pointer to the (long gone) parent is dereferenced and a count decremented. Since this memory can, and is, allocated for other purposes (in the case of kern/42277 an inodedep structure), chaos ensues. The offset in question in inodedep is the offset of the 16 bit count field in the ipfw2 ipfw_dyn_rule. Submitted by: Jim Kuhn <jkuhn@sandvine.com> Reviewed by: "Evgueni V. Gavrilov" <aquatique@rusunix.org> Reviewed by: Ben Pfountz <netprince@vt.edu> MFC after: 1 week
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