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Avoid undefined behavior.

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The 'pktid' variable is modified while being used twice between
sequence points, probably due to htonl() is macro.

Reported by:	PVS-Studio
MFC after:	1 week
This commit is contained in:
Andrey V. Elsukov 2017-04-14 11:58:41 +00:00
parent ba3e1361b0
commit da62ffd9cd
1 changed files with 2 additions and 1 deletions
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3
sys/netpfil/ipfw/nat64/nat64stl.c
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@ -75,7 +75,8 @@ nat64stl_log(struct pfloghdr *plog, struct mbuf *m, sa_family_t family,
plog->action = PF_NAT;
plog->dir = PF_IN;
plog->rulenr = htonl(kidx);
plog->subrulenr = htonl(++pktid);
pktid++;
plog->subrulenr = htonl(pktid);
plog->ruleset[0] = '\0';
strlcpy(plog->ifname, "NAT64STL", sizeof(plog->ifname));
ipfw_bpf_mtap2(plog, PFLOG_HDRLEN, m);