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Differential D39063

pf tests: test IPv6 fragmentation with link-local addresses
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Authored by kp on Mar 13 2023, 5:19 PM.
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Subscribers
farrokhi
glebius
imp
jlduran
melifaro

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network
pfsense
Commits
rG4b77c46dc29a: pf tests: test IPv6 fragmentation with link-local addresses
rG5e7bbde17d53: pf tests: test IPv6 fragmentation with link-local addresses
rG225e85513fd7: pf tests: test IPv6 fragmentation with link-local addresses
Summary

We've observed a panic after pf_refragment6() with link-local addresses,
because pf_refragment6() calls ip6_forward() even for a simple output
case.
That results in us entering ip6_forward() with an mbuf with a NULL
m->m_pkthdr.rcvif, which can cause a NULL deref (but seemingly not for
GUAs.

Test sending fragmented link-local packets to pf.

MFC after: 3 days
Sponsored by: Rubicon Communications, LLC ("Netgate")

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rG FreeBSD src repository
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Tests Not Applicable

Event Timeline

kp created this revision.Mar 13 2023, 5:19 PM
Herald added subscribers: glebius, melifaro, farrokhi, imp. · View Herald TranscriptMar 13 2023, 5:19 PM
kp requested review of this revision.Mar 13 2023, 5:19 PM
kp added a parent revision: D39062: pf: set scope in pf_refragment6().
Harbormaster completed remote builds in B50330: Diff 118755.Mar 13 2023, 5:19 PM
jlduran added a subscriber: jlduran.Mar 13 2023, 10:52 PM
jlduran added inline comments.
tests/sys/netpfil/pf/fragmentation.sh
128

While ping6 is still a thing, I would humbly advise to use ping -6 instead.

kp updated this revision to Diff 118789.Mar 14 2023, 7:39 AM

ping6 -> ping -6

Harbormaster completed remote builds in B50351: Diff 118789.Mar 14 2023, 7:39 AM
This revision was not accepted when it landed; it landed in state Needs Review.Mar 16 2023, 10:01 AM
Closed by commit rG225e85513fd7: pf tests: test IPv6 fragmentation with link-local addresses (authored by kp). · Explain Why
This revision was automatically updated to reflect the committed changes.
kp added a commit: rG225e85513fd7: pf tests: test IPv6 fragmentation with link-local addresses.
kp added a commit: rG5e7bbde17d53: pf tests: test IPv6 fragmentation with link-local addresses.Mar 20 2023, 9:47 AM
kp added a commit: rG4b77c46dc29a: pf tests: test IPv6 fragmentation with link-local addresses.

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Changeset List

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tests/
sys/
netpfil/
pf/
10 lines

Diff 118904

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tests/sys/netpfil/pf/fragmentation.sh

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