git: ee1d1e38fae6 - stable/13 - pf: remove incorrect fragmentation check

The branch stable/13 has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=ee1d1e38fae65d045b113a7053651bbd7b780e1d

commit ee1d1e38fae65d045b113a7053651bbd7b780e1d
Author:     Kristof Provost <kp@FreeBSD.org>
AuthorDate: 2023-11-29 18:06:31 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2023-12-05 18:25:22 +0000

    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)
---
 sys/netpfil/pf/pf.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/sys/netpfil/pf/pf.c b/sys/netpfil/pf/pf.c
index c09f80d2f82b..e03fcbbe37a9 100644
--- a/sys/netpfil/pf/pf.c
+++ b/sys/netpfil/pf/pf.c
@@ -4780,8 +4780,7 @@ 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) {