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| author | Kristof Provost <kp@FreeBSD.org> | 2023-11-29 18:06:31 +0000 |
|---|---|---|
| committer | Mark Johnston <markj@FreeBSD.org> | 2023-12-05 18:24:35 +0000 |
| commit | a47a44c0d69ce82f302b02da940538a99b47037f (patch) | |
| tree | 7b77f63c9389ddb8f52cc006b5a92d6ea19ac034 | |
| parent | 9b8515f71bd413520ba7d8e2b92a60deb2c7a528 (diff) | |
| download | src-a47a44c0d69ce82f302b02da940538a99b47037f.tar.gz src-a47a44c0d69ce82f302b02da940538a99b47037f.zip | |
pf: remove incorrect fragmentation check
We do not need to check PFDESC_IP_REAS while tracking TCP state.
Moreover, this check incorrectly considers no-data packets (e.g. RST) to
be in-window when this flag is not set.
Sponsored by: Rubicon Communications, LLC ("Netgate")
Approved by: so
Security: FreeBSD-SA-23:17.pf
(cherry picked from commit 6284d5f76d6bd2d97fe287c5adabf59c79688eda)
| -rw-r--r-- | sys/netpfil/pf/pf.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/sys/netpfil/pf/pf.c b/sys/netpfil/pf/pf.c index 84bd75276af7..e19370cc7333 100644 --- a/sys/netpfil/pf/pf.c +++ b/sys/netpfil/pf/pf.c @@ -5367,8 +5367,7 @@ pf_tcp_track_full(struct pf_kstate **state, struct pfi_kkif *kif, (ackskew <= (MAXACKWINDOW << sws)) && /* Acking not more than one window forward */ ((th->th_flags & TH_RST) == 0 || orig_seq == src->seqlo || - (orig_seq == src->seqlo + 1) || (orig_seq + 1 == src->seqlo) || - (pd->flags & PFDESC_IP_REAS) == 0)) { + (orig_seq == src->seqlo + 1) || (orig_seq + 1 == src->seqlo))) { /* Require an exact/+1 sequence match on resets when possible */ if (dst->scrub || src->scrub) { |