https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240135
Bug ID: 240135
Summary: Correctness issue in IPv6 extension headers input
processing routines
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
There seems to be a correctness issue in pr_inputs defined for various
extension header processing routines for IPv6.
The routines call IP6_EXTHDR_* macros which may end up releasing the mbuf
passed to the routine.
Even though the functions are passed pointer to the pointer to mbuf, the
pointer is not updated before returning from the routine even for the cases
that may not return IPPROTO_DONE.
Change would be to simply update the mbuf pointer along with updating the
offset.
Please refer to implementation of route6_input/dest6_input
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